| 00:00 | missing scholar. Yeah. If you about missing any class material, there's |
|
| 00:08 | so you can rely toe. In words, you should focus on money |
|
| 00:13 | than worry about taking notes. so I think we're still waiting for |
|
| 00:19 | people. I think I'm still like, three, maybe maybe |
|
| 00:23 | Uh, anybody. Any questions for , You know? And how we |
|
| 00:27 | is okay. And if you don't how low pronounce my first name? |
|
| 00:33 | , uh, my suggestion is how Do this. How way. Do |
|
| 00:39 | . Okay. Right. So, , I wanna tell you that |
|
| 00:45 | all those not as good as a to face in many situation. It |
|
| 00:50 | a lot of energy because we have . Uh, we're on the same |
|
| 00:55 | , were forced to, right. you can take a break if you |
|
| 00:58 | to. On also, actually, best. Making all my files class |
|
| 01:04 | ahead of time. So you can can see my all my slides a |
|
| 01:11 | off to before the class. for example. Uh, next |
|
| 01:17 | This is a very fast paced Right. So we cover today. |
|
| 01:22 | day tomorrow, tomorrow, Hobday were down. That's crazy. But that's |
|
| 01:29 | point. That's the reason why you take this. Because give me very |
|
| 01:34 | . However lending take time, Lending always takes more time than you |
|
| 01:40 | . Uh, you don't want to grab the surface scratch surface. You |
|
| 01:47 | want to know by comparison, Contrasting connecting the dots, Uh, kind |
|
| 01:56 | digesting discussion on so on. So very critical for everyone. Toe be |
|
| 02:06 | bring your questions to class. especially in those situations. So |
|
| 02:12 | Pace eso before I go to details waiting for other people. It's one |
|
| 02:17 | now. We're starting officially. We started recording. I want to make |
|
| 02:22 | you guys know that I have no at all Actually. Welcome. People |
|
| 02:27 | questions in class. Okay, I tell you this exactly how I |
|
| 02:34 | You know, I remember even today I was three my master degree courses |
|
| 02:42 | those courses also that you guys very I had eighties like you know, |
|
| 02:49 | pm to 10 pm classes you can't . You know you got to |
|
| 02:53 | You can You can help. Initially have coffee. Everything. Not even |
|
| 02:58 | wouldn't help me. So my solution asking questions. Eso that time My |
|
| 03:07 | for asking questions. Just keep me . Uh, if I ask question |
|
| 03:12 | I'm not interesting anymore. Well, was not dating. That's that evening |
|
| 03:15 | . And so that's between me So, uh, yeah, Onda |
|
| 03:26 | few freed us question. So if ask me any tapes of the class |
|
| 03:33 | slides that you feel you have some or questions making nos eso you can |
|
| 03:42 | questions. You in class. All , that's the key. That's That's |
|
| 03:48 | only thing I suggest you don't be of asking. Um, I think |
|
| 03:52 | are people. Let me put this . I say to tell people asking |
|
| 03:57 | in class. Typically, one very cases are people who truly don't know |
|
| 04:02 | . Very few cases. Most people questions the ones who are really |
|
| 04:07 | they asked question Now toe in a of Understand that question, sir. |
|
| 04:12 | meaning. Please try to digest. started looking for other people's angle. |
|
| 04:20 | , it's very important to ask Hey, asked me any advice for |
|
| 04:25 | successful told me. The only advises question class Andi also get to know |
|
| 04:32 | teachers, Your T A s. the very beginning, use the time |
|
| 04:36 | our use of time for one more . You know, you pay time |
|
| 04:42 | money to take horses. You need make all your investment. You |
|
| 04:47 | pay back to you as soon as can. All right. So, |
|
| 04:52 | , any questions? Anyone here? think we're full cause not everybody |
|
| 04:56 | Now, Anybody have any questions for and auto? Maria, you're a |
|
| 05:03 | free speech are. If nothing, going to starting with the to |
|
| 05:07 | uh ah. Lecture notes. Everybody see it. Right? So I'm |
|
| 05:16 | to go through the requirement off the so that if anyone has ah, |
|
| 05:23 | question we can discuss about it? , on. So we have |
|
| 05:30 | but you're not required to buy I mean, it's optional. I |
|
| 05:33 | this book published six years ago. , seven years ago now. So |
|
| 05:39 | assessment part, we will have one at the end of every half day |
|
| 05:46 | , probably around 4. 30. , so every half this material are |
|
| 05:54 | toe three sections about one hour Right? So we do one hour |
|
| 06:01 | discussion everything or exercise and everything. we take a 10 minutes break. |
|
| 06:07 | 10 minutes. So roughly said today started 1 p.m. Maybe two PM We'll |
|
| 06:12 | our first grade. You can whatever , you know, restaurant or |
|
| 06:17 | Now we start saying to hand roughly , roughly then then we have three |
|
| 06:24 | than 4. 30. We do place. All the crazies on exams |
|
| 06:31 | be open. Book. All We'll be open book for the crease |
|
| 06:36 | . Small place. Just most of just have to kind of question both |
|
| 06:42 | . First time is I give you statement. You circle tools off T |
|
| 06:46 | f. That's that's That's the first . So basically, I'm trying to |
|
| 06:52 | sure you you see the concept. see the material as a review On |
|
| 06:57 | second tab, I might give you of terms that were similar and ask |
|
| 07:04 | toe compare or contrast. Okay, open book, you know, whatever |
|
| 07:10 | want to do, Andi Limiting the for the place to be 25 |
|
| 07:18 | In my experience, uh, I've institution cause of many, many |
|
| 07:24 | of course, wanted to physical Most people down in 20 minutes or |
|
| 07:28 | minutes. So you should have ample to finish. If you wanna worry |
|
| 07:32 | by some checking 25 minutes should be . Okay. And the reason I |
|
| 07:37 | that is because after you got to , you can submit to me by |
|
| 07:43 | if you can. Or you can by. Uh huh. Blackboard blackboard |
|
| 07:49 | a port. You can submit your . The good thing about Blackboard is |
|
| 07:54 | you will be able to see the . Everything the ta can easily greater |
|
| 07:59 | orderly fashion. Okay, but first , if you have a trouble sending |
|
| 08:04 | uploading by blackboard off Chris result you send me off Maria by by |
|
| 08:13 | That's the first thing on, for your submitting fire. Also |
|
| 08:17 | American relations First double use the video by pdf files. I'm hiding me |
|
| 08:26 | . A single peter file. so maybe it has resolved We're |
|
| 08:33 | I was wrong zone, actually. huh. Blackboard where? B |
|
| 08:40 | See, I found my error Blackboard. We're blackboard or email blackboard |
|
| 08:47 | as a pdf file. If you know how to do that, we |
|
| 08:51 | ask. We can figure out how help you, okay? And I |
|
| 08:56 | label the foul name using my I d like a Q one, |
|
| 09:04 | . One my skin 80. Your even. Why? The reason is |
|
| 09:08 | easier to identify who you are. questions? We're happy, right? |
|
| 09:14 | hope you guys heavy. You I'm trying to be happy. A |
|
| 09:19 | , you are. Okay, so me continue on. So you I'm |
|
| 09:27 | about the quick, quick time limited minutes each. The exams. I |
|
| 09:33 | give you more time because there is time to go through the answer that |
|
| 09:37 | . So if you look a schedule , our first exam is Friday next |
|
| 09:44 | . Okay, today's 22nd Friday next on tonight. Let me give myself |
|
| 09:50 | pointer. So 29th, we will our first exam at the end at |
|
| 09:57 | end of lecture. Okay, like I said, they were gonna |
|
| 10:02 | , uh, two sections, which about two hours plus 20 minutes off |
|
| 10:09 | time. So we started one. so roughly 3. 30 we got |
|
| 10:17 | the exam. Why? Okay, I will give you a lot more |
|
| 10:24 | for exam. So you have a . Either you want to go or |
|
| 10:31 | . You want to finish by five answers or your water, You |
|
| 10:36 | review more material and good exam after up to you. Uh, my |
|
| 10:42 | , Uh, most of them want prefer the letter in Other verses Do |
|
| 10:45 | want to do, like to you know, our and a half |
|
| 10:49 | limit. Most people try to say I hear from before is open for |
|
| 10:54 | online courses. I heard people like see more time, for example. |
|
| 11:00 | I plan to give you until next . Can you mind? We have |
|
| 11:07 | next morning. Next morning is So you knew 20 year exam by |
|
| 11:14 | beginning of next morning. If you're person you want to some more review |
|
| 11:20 | , you want to let you have have ample time that I'm sure the |
|
| 11:25 | . So your time for the queen's ? More quiet. More tied than |
|
| 11:29 | time for exams. Anything unclear? you want me to go through. |
|
| 11:36 | . All right. So feel free come back. Ask the same |
|
| 11:38 | That's OK. I understand something. have You want to speak out. |
|
| 11:43 | speak out. I notice most of guys are geologists in master program. |
|
| 11:51 | I try to reduce my equal exposure equations. So my purpose for you |
|
| 11:59 | learn is the focus on the physical First concept on ideas. Okay. |
|
| 12:07 | you don't even know something about the about questions whatsoever. If you cannot |
|
| 12:13 | great. So the I'm not emphasizing trying to give you the best score |
|
| 12:18 | you. I'm trying emphasizing you really the concept. I'll be able to |
|
| 12:23 | it for your career. Okay, your involvement into the discussion or questioning |
|
| 12:33 | critical. So here are the three today. Uh, I spent 10 |
|
| 12:38 | on interpretation for the class information Right. So everyone on board |
|
| 12:45 | So let me talk about it. we're gonna talk about introduction, my |
|
| 12:49 | to show you what is the petroleum ? What we're doing basically, and |
|
| 12:56 | we'll all this data we deal how do we measure the quality signal |
|
| 13:02 | noise ratio SLR signal noise ratio. the ways resolution. Okay. And |
|
| 13:11 | also detail about seismic attributes. Those the most important ones, and I'm |
|
| 13:18 | on the face. I'm gonna show some examples. For example, you |
|
| 13:22 | to do a video interpretation for reservoir on, You need to know what |
|
| 13:28 | amplitude, What's the right issues involved the face issue involved on clearly with |
|
| 13:34 | , uh, 10.5 days you cannot to cover everything. So I'm kind |
|
| 13:41 | selective here. I give more slides that I might be ableto cover. |
|
| 13:48 | on how many question you guys rises election time. So I want I |
|
| 13:54 | not cover every side. But my is covered apiece lines, which I |
|
| 14:00 | ask questions were cooking over some, know, examples or some exercise. |
|
| 14:06 | you want any small thing we can together. Okay, So first of |
|
| 14:14 | , let's define as example in some questions in the past, when we |
|
| 14:18 | a closed book test, I often question about definitions. Okay, Tomi |
|
| 14:25 | is very important because is the basic off communication between professionals. If you |
|
| 14:35 | terms differently differently from other people, miscommunicated. Basically, people were thinking |
|
| 14:42 | they know, but they don't that's causing trouble. Practically, I can |
|
| 14:49 | you that most questions I don't know you agree or not. If you |
|
| 14:53 | to interview a job interview. Most job interview about definitions in my |
|
| 15:03 | Okay, so they ask you something you know, something about Sacre called |
|
| 15:08 | . That's kind of definition. Years ago in the nineties, I |
|
| 15:15 | working for Exxon working. I was for Exxon production company on part of |
|
| 15:20 | job business. They called a resource . It's a nice name, but |
|
| 15:24 | means I'm the one giving questions for . Sure, actually, could a |
|
| 15:29 | people who act on that time before was there very briefly, less than |
|
| 15:32 | years roughing year and a half. I I helped recruit several key people |
|
| 15:38 | , including a formal manager. I know what he's doing now, |
|
| 15:42 | Anyway, so this is definition as . What is petroleum, seismology or |
|
| 15:49 | ? Uh, I'm just saying, among the most among the major technical |
|
| 15:54 | supporting petroleum exploration and exploitation I didn't . I'm just saying they use it |
|
| 15:59 | a way. Okay, this is difficulty of definition it It's like your |
|
| 16:04 | dictionaries for same term there, like list off meaning so you choose the |
|
| 16:10 | relevant. So we talked your your definition for manager pretty different from your |
|
| 16:17 | for technicians. Right? So it's different. Eso some example here way |
|
| 16:23 | on technology, but they're actually a of other relevant the field, like |
|
| 16:28 | , production, gravity, magnetic, and so a lot of relevant |
|
| 16:35 | So to start with, I'm sure know this There are five preconditions for |
|
| 16:43 | . Gas reservoirs. Right. So are five, uh, preconditions. |
|
| 16:51 | , I putting in usually in blue . Some keywords, like source |
|
| 16:57 | as you know, eating, reservoir rocks capable conceal on track. |
|
| 17:07 | as a review, I'm telling Petronius Technology place in What are you |
|
| 17:11 | away those fire conditions? Just as first one was discussion. Can anyone |
|
| 17:18 | me the difference between, uh, and track? You guys geologists, |
|
| 17:29 | . Many of you can you tell difference between sale and track? A |
|
| 17:36 | is one element of a trap. , good. Anybody else? When |
|
| 17:42 | that. Thank you. For for that anyone else had any, |
|
| 17:49 | opening or input on? What about differences? I'm gonna tell you I |
|
| 17:56 | Okay, Go ahead. Anybody want say anything? Uh, trap usually |
|
| 18:01 | a structure seal is the mineral or rock that is sealing the poorest |
|
| 18:09 | Mhm. Yeah. Okay, Let me let me add that. |
|
| 18:13 | is a part of the learning. ? You ready? I I really |
|
| 18:17 | expert, you know, more detail subtle details. Okay. English |
|
| 18:23 | of course, is going to You know, you close your tie |
|
| 18:27 | , but keep in mind a our aerial war. It's not a |
|
| 18:32 | is a 40 right? There's time so trapped here, Tomi including not |
|
| 18:41 | especially also time parolee is evolving. tribe, also including timing elements. |
|
| 18:53 | , why they make it to, know, for if I should be |
|
| 18:55 | same thing, why they're making extra off course. This is my |
|
| 19:00 | but I'm just telling you, really geological features are 40. You |
|
| 19:07 | have a right time. Right place have the right reservoir. Right? |
|
| 19:12 | . Okay. And let's keep Whoops. How come I'm stocked? |
|
| 19:22 | right. So this one shows you example that if you look in the |
|
| 19:27 | off one reservoir, one oilfield from , for example first well before first |
|
| 19:35 | drill. You do exploration global things your discovery, man, and then |
|
| 19:42 | development and all the way until ending begins on, then face out. |
|
| 19:48 | ? I'm sorry. I go too . The only decent plan that are |
|
| 19:52 | forever is geophysics or especially petroleum. seismology is from the very beginning, |
|
| 19:59 | the way to the very ending. we have replay rule all the way |
|
| 20:03 | exploited exploration to exploitation, even toe engineers. So, in a |
|
| 20:09 | off the usage off the knowledge we today I mean the class we can |
|
| 20:15 | an entire lifetime. I will tell also even beyond So you can use |
|
| 20:20 | same thing. For example, of videos or geology toe help you go |
|
| 20:24 | petroleum. If you're looking for engineering off government, Okay. Even for |
|
| 20:32 | example, detecting, uh, subsurface or poodles. You can You can |
|
| 20:40 | it clearly. Okay, if you you're working for working on government branches |
|
| 20:46 | monitoring subsidence or one of the other , So it's way beyond just |
|
| 20:54 | and I'm going, I'm not going spend time on those on those slides |
|
| 20:58 | because your novels, so I'm just down. Basic idea about seismic |
|
| 21:05 | The key point here I wanna show is the most that our using for |
|
| 21:09 | Imaging the oil field most of them Reflection is which means other data. |
|
| 21:16 | probably think they're not. They're We're actually are much more strict. |
|
| 21:21 | times most companies so far on Lee primary reflections What is the primary |
|
| 21:29 | Those are reflections only bounds by only is responsibly by once. If you're |
|
| 21:38 | that the waves like a ping pong ping pong bouncing between your play on |
|
| 21:43 | world example you can bouncing more than , right? So when I'm wanting |
|
| 21:47 | than once, that's multiples we call reflections. Eso Onley signal we're using |
|
| 21:54 | most cases are just only primary And also the land survey the source |
|
| 22:02 | Okay, on this is Marine survey streamer survey most time using air guns |
|
| 22:10 | times the frequent events of data I say about high five hertz upto something |
|
| 22:17 | 100 most common 70 80 years. , most oil oil explorations situation. |
|
| 22:26 | , sometimes some people using speaker, it's very rare. Most time we're |
|
| 22:30 | just air guns and here's I cartoon showing the cross section off Ideal re |
|
| 22:38 | is the top one. We call both top and bottom. We call |
|
| 22:42 | , uh, common shot. Gather common target. There is a single |
|
| 22:47 | or source received by multiple receivers right? But even then, we |
|
| 22:54 | have two situations. We can have speed spray or, in the on |
|
| 22:58 | , the Indian sprays situation. for Marine Reserve, you have bolt |
|
| 23:04 | a source or air guns arrayed behind boat. Then you have a |
|
| 23:09 | right? So it's only end Only one side has a shot. |
|
| 23:15 | contrast, the receivers on the landed typically displayed spray. So you have |
|
| 23:22 | have receivers are around the shot, I only show you the two D |
|
| 23:28 | I only draw through the But it's very similar. We're similar in three |
|
| 23:32 | case, okay, and you notice issue about those natural way off construct |
|
| 23:41 | . That is something called the spring . The spray. What spray |
|
| 23:47 | You might think it's a spray The receivers actually spray in. Seismology |
|
| 23:52 | means it means the the range off range off reflections. So you have |
|
| 23:58 | shot, the rate of reflection spread a wide distance, which is, |
|
| 24:04 | , good and bad, depending on you're doing. If you're forming, |
|
| 24:08 | you wanna forming a result image resolved one location, for example, then |
|
| 24:15 | spray will help you with redundancy or the signals ratio. Give you different |
|
| 24:23 | , especially one the reflectors, not . Then they may not even on |
|
| 24:27 | same death. Maybe, you upper down sweet up. That's no |
|
| 24:33 | in many situations. So early days people worry about enhanced in the |
|
| 24:40 | enhance the multiple exposures off subsidies people to solve. This saw this into |
|
| 24:47 | else called Calling Me the Point Getter C D. P gathers. I'll |
|
| 24:52 | you in a moment. So in d survey we have, you |
|
| 24:56 | we have a land data geometry vary on one. A headache for land |
|
| 25:03 | is the new service because your the material, are often not the |
|
| 25:08 | week. There just, you like loose sand in this case, |
|
| 25:11 | symptoms. And they have lots of blasting channels, galleys, fractures and |
|
| 25:18 | on. caverns. So there are of near surface complications, in a |
|
| 25:23 | , is like 30 glass on the are preventing other fancy. Better picture |
|
| 25:29 | service. All right, so that's another issue we have. So we'll |
|
| 25:34 | to discuss uh ah. Theoretical advantages cross bearing on some examples about land |
|
| 25:46 | . This is called a bottom Geometry. Okay, mostly patches on |
|
| 25:52 | patches of receivers. Not a because naturally we fire one shot recorded |
|
| 25:58 | many receivers. So most of the of other receiver patches okay, you |
|
| 26:03 | why there's a black, white like . That's because if you grew up |
|
| 26:08 | this, this is one shot A lot of receivers. All this |
|
| 26:13 | cause effective management management. You if we don't have limits on time |
|
| 26:18 | , we can produce it everywhere. this way we see half of the |
|
| 26:24 | so we can cover more spaces with time, Right? So that's the |
|
| 26:30 | eso land they have most likely like one direction we know solves nothing or |
|
| 26:37 | in that kind of geometry on. is the same they have. Once |
|
| 26:43 | done with the middle point, this every class. Here is the mid |
|
| 26:48 | . What's the point? Means that you're taking Let me change this to |
|
| 26:56 | . Paying options. I'm using the . Amusing shining color, maybe paying |
|
| 27:03 | . Uh huh. The red Maybe that will work better. So |
|
| 27:08 | my shot. Okay. If I any of you sure, I don't |
|
| 27:12 | which one. I'm just take Okay? This river is a |
|
| 27:15 | Are if I draw a straight line the two? The point. The |
|
| 27:23 | . It's called the point. So broke cost there. Alright. So |
|
| 27:30 | points for every trees. One one trees way. Put that trace |
|
| 27:35 | the middle point. So when you this shot you have receivers you put |
|
| 27:41 | point together. You hear something like ? All right, this is this |
|
| 27:45 | a big point. Even wondering how they're not even? Well, they're |
|
| 27:49 | even because a lot of reasons because topography. There's a missing traces on |
|
| 27:55 | also. All right, so this a midpoint plot notice a midpoint part |
|
| 28:01 | our coordinates. Dimension becomes offset. of a sudden simply means the distance |
|
| 28:10 | shot on receiver. That's kind of zero here. Zero there means the |
|
| 28:20 | off shop. So in other relocation rarely middle in this case that that's |
|
| 28:26 | shot location. So if you have good point here that that that made |
|
| 28:32 | point that have zero offset So you a near offset here I have father |
|
| 28:39 | there on where far farther offset There Makes sense is actually very straightforward in |
|
| 28:48 | sense. But this are gradually You're in your situation, you |
|
| 28:52 | more and more as you go in very beginning which is the factual information |
|
| 28:57 | definition in terms. As we we got more you know, conceptual |
|
| 29:04 | issues involved As we go Take your . No hurry again. Like I |
|
| 29:08 | , feel free. Do you have questions? OK, bring up. |
|
| 29:14 | we deserve a We have neither as White House, muse, Multiartha, |
|
| 29:19 | and so on. But you can can even have ah you know both |
|
| 29:24 | swing Go circle right? They can that too that in order to achieve |
|
| 29:30 | , uh, mutual direction But that's very difficult to do because you have |
|
| 29:35 | behind a streamer very long. So times those circle very large. It's |
|
| 29:40 | typical. Streamer time. Miles That's that's very typical. We also |
|
| 29:47 | a marine bottom Ocean bottom receivers can cable can B O B s, |
|
| 29:54 | , bottom seismographs. Okay, this more more common now on this here |
|
| 30:00 | marine situation, the left is the mapping view off the shot to shot |
|
| 30:05 | the streamers right Is corresponding. the point of location. The same |
|
| 30:12 | . Zero offset coordinates. North, , east, west. The Russians |
|
| 30:18 | there's a There's England. Russian. across land. Direction in line simply |
|
| 30:24 | the dancer direction off receivers. Typically long streamer sitting locations. Good. |
|
| 30:34 | more example. You notice the curvature the receivers streymur due to currents. |
|
| 30:40 | , Their current is pushing this So the curve are on notice that |
|
| 30:45 | brought here spread out because the curve on. This is called a favoring |
|
| 30:50 | feathers. Like a bird feeder. , Federally. Okay. The one |
|
| 30:58 | we always talk about is the quality off, you see? Okay, |
|
| 31:03 | always important QC recording whatever anomalies parameters, the values, eso there |
|
| 31:11 | lots of issues. My class is focus on opposition at all. I'm |
|
| 31:15 | on processing. So I But I imagine it's because they're all tied together |
|
| 31:21 | degree. If you're looking for you got no of them. Maybe |
|
| 31:26 | expertly want to area. Bunch of everything else in general. General level |
|
| 31:31 | know that. Okay, multiple here survey design. So most issue in |
|
| 31:38 | design trying to give the best That's the sculpture off the potential target |
|
| 31:45 | at the same time, saving money time on time and money are very |
|
| 31:51 | issue, Right? Very often times worthwhile than money. So a lot |
|
| 31:58 | efficiencies for time. So I just you a moment ago. But that |
|
| 32:02 | now here's different on this one uh, changing toe common midpoint |
|
| 32:09 | See em together. Come with me find Gator, which is lower |
|
| 32:14 | Okay, this is coming upon CNPC together and the top one the |
|
| 32:22 | better. Or this is common in Gator Common Interrogator, this is coming |
|
| 32:26 | natural trace. But the c N is not natural. You don't? |
|
| 32:30 | cannot have, you know, create one just by one shot. You |
|
| 32:34 | many, many shots. Give you one, CMP Good. So we |
|
| 32:41 | to see MP for the reason that wanna make imagery of this location or |
|
| 32:47 | location. All this location. So have reflectors along the year. Zero |
|
| 32:52 | location are CCMP. The CNN people you tohave multiple angles, viewing the |
|
| 32:59 | locational reflectors. That way you can the location, the geometry, a |
|
| 33:06 | of factors. Okay, so this very critical. This also the essential |
|
| 33:13 | the same coordinates for you to producing of you gather everyone was the same |
|
| 33:20 | . I was looking the same location relativity, empathy use as function of |
|
| 33:27 | . Right. So here on top , offset zero. Then also the |
|
| 33:33 | off the foul set. Right? follow Seth up there, so zero |
|
| 33:39 | . You're upset. Fall set So can if you plot the amplitude |
|
| 33:43 | Reflections are functional. Offset. You're the idea basically, so you can |
|
| 33:51 | the situation. What happened? If reflectors, not layer cake, we |
|
| 33:56 | have little kick one like left We can have a deep in line |
|
| 33:59 | right side. Notice that the activation spray debated from middle to left. |
|
| 34:09 | ? Okay, depend on which way different but regardless, if you |
|
| 34:14 | regardless of the dipping angles, if have a CMP the spray, which |
|
| 34:19 | a ways off the mid points away the middle point million from middle, |
|
| 34:24 | sprays minimized because using your using CMP comparison for example, using this, |
|
| 34:32 | , common receive together see Hawaii spread is how mutable spray. That way |
|
| 34:40 | have less influence from other issues away your CNPF points. So you have |
|
| 34:46 | better chance to have a true imagery produced. Even though you have no |
|
| 34:54 | on the sub certain information, no what happens, you're more likely close |
|
| 34:59 | the true occasion. All right, I'm gonna give you example. Here |
|
| 35:08 | the map view. This is a survey happening along. We condone |
|
| 35:15 | I don't know how many I'm sure of you guys have been travel |
|
| 35:18 | I tend away from here toe in name right off Florida. This town's |
|
| 35:23 | after you left the Texas. When go beyond Beaumont, go beyond |
|
| 35:29 | You Louisiana. The very first time see Winton is coming. There's a |
|
| 35:35 | called Clinton. No, I was working this project. So that's why |
|
| 35:40 | give you an example that ourselves. me ask the question first. I'm |
|
| 35:45 | make sure you guys are following I have to color here. The |
|
| 35:49 | colors that's on the black color Which one is a shot? Which |
|
| 35:56 | as well Shot pink. One one another one must be receiver. |
|
| 36:00 | one would think, for example, pink ones pink one shots or |
|
| 36:08 | Anybody Shut up shut. Okay, . Thank you, Um, or |
|
| 36:15 | else? I guess we're voting for about shots. Think about the |
|
| 36:27 | All right, let me spend to . This is there's logic here. |
|
| 36:31 | . On paper Doesn't matter which because everyone occupy. Okay, but |
|
| 36:37 | we're using Pink line or Black one shot. There's a huge difference on |
|
| 36:42 | cost. What's the cost? I , kind our money. The reason |
|
| 36:49 | that that your fans, unless using , if using regular gee opens Joe |
|
| 36:55 | not come by as a single point time. The real geophones, that |
|
| 37:00 | er's. There's a cable power cable all the job stream. I got |
|
| 37:06 | telling them. Okay, so I 1000 job on stream. You want |
|
| 37:13 | deploy in the field. It is easier to deploy them a straight |
|
| 37:18 | It's very hard employment of the We have a lot of issues |
|
| 37:25 | you know, obstacles. Who else what's in the point? So that's |
|
| 37:33 | the purple actually used streamers. I'm sorry, the streamer Geo Fong |
|
| 37:40 | because they're very easy to deploy to line. Okay, so practically those |
|
| 37:47 | the issues involved in the survey design have to worry about. How do |
|
| 37:51 | deploy them? How do you harvest afterwards? How can you guarantee the |
|
| 37:58 | ? You know, during the how can you guarantee the minimum laws |
|
| 38:02 | equipment on error and easy to So you have all about all of |
|
| 38:08 | , all these issues. So if do a survey design, lots of |
|
| 38:12 | should go toe worry about it. like organized today for the magazine off |
|
| 38:19 | is a lot of logistics you have . Not sure there is no any |
|
| 38:24 | the chance of mistake. Okay, that's the hard case. I'm hypothetically |
|
| 38:32 | this being on top. I call a c p. p r c |
|
| 38:37 | p beaning. This is a so I'm not gonna be inside very |
|
| 38:43 | so I can see the boxes. can see the being reality. The |
|
| 38:47 | inside will be like about half of space in between between geophones so they |
|
| 38:53 | lot smaller. But I'll give you hypothetical example. Remember, I just |
|
| 39:00 | in last few slides if you have shot, every receiver development points, |
|
| 39:05 | for so for every single being for example, I'm taking opportunity. |
|
| 39:09 | , for example, I'm taking this . Here's one. Be okay. |
|
| 39:15 | you can collect the traces. Who's points are in this being right? |
|
| 39:24 | everything here you can you can organizing see where the big point into this |
|
| 39:30 | . Because you have a example that on to the receiver. This is |
|
| 39:38 | here. Many point goes through the on that one. Okay, that |
|
| 39:43 | inside. So you're collecting all the that has said the midpoint inside that |
|
| 39:50 | being we call that a CBP together sitting together. So every being here |
|
| 39:59 | have one gator. That's how you together on the number of middle points |
|
| 40:05 | number of trace for that being is of fold. Okay, so for |
|
| 40:12 | means the number off CDP comedy channels that CDP in that being got |
|
| 40:21 | That's always very simple. If you textbook textbook anywhere, most of them |
|
| 40:26 | tell you the equation. There's some there. I'm not going to get |
|
| 40:31 | equation. Just Well, I might to. Sometime later on, I'll |
|
| 40:35 | to focus on the concept. All , so basically, it is a |
|
| 40:43 | off the head. Come. How traces? Pretty location. Remember every |
|
| 40:50 | here, maybe even going downwards will many, many reflectors. So every |
|
| 40:57 | beneath this will show you basically roughly reflections, pouncing, pounding on that |
|
| 41:03 | on the letters, that kind of . Show us the quality of data |
|
| 41:09 | the more traces person per being, more chance you can enhance the |
|
| 41:16 | The most video when you do for example. Okay, So here's |
|
| 41:25 | example of the house, as you on a typical day, have a |
|
| 41:30 | on the left. Then we have space. All right? What we |
|
| 41:34 | where it came from, I'm not spend time on this one today. |
|
| 41:38 | later on more more time. We come back about this issue. |
|
| 41:44 | There's always know your business. So ? That I said maybe spend by |
|
| 41:49 | models. This is an issue in business in general. Another issue about |
|
| 41:55 | and cost. We often have quality you Here arises that how much is |
|
| 42:05 | much? Okay, in this I give you two example One finally |
|
| 42:11 | on the left. Your brother was 25 between the right chaotic difference in |
|
| 42:20 | . I thought you can So this the case is overdone. How many |
|
| 42:26 | over, don't you think? Five over. Down five times of |
|
| 42:34 | No, it's at least five square at least 100 times difference in money |
|
| 42:40 | time and money five times in one . Okay, there's another dimension. |
|
| 42:47 | dimension X y and Z South It's a fight toe. Third power |
|
| 42:54 | say so. It's very, very . The slight increase in intensity on |
|
| 43:02 | display issues here you can see we're worry about it around, but they're |
|
| 43:07 | Well displayed, like white color. , mhm This place you again. |
|
| 43:17 | this figure is show. But you , the three components opposition processing interpretation |
|
| 43:24 | will tie together very tightly tied together Here's some examples off processing interpretation. |
|
| 43:47 | , this one's plot of the velocity the heavy. Okay, different mythologies |
|
| 43:52 | there. The trouble is, however most time you have two different anthology |
|
| 43:58 | you the same velocity and same So it's very not unique on this |
|
| 44:09 | is very busy, but I want show you the issue Here were often |
|
| 44:12 | have many sections we can cop. right, We can track in the |
|
| 44:18 | reflections across for one place. Next , the next one on tie with |
|
| 44:25 | great columns on wall off. If lucky, you have well of |
|
| 44:33 | Yeah. Okay. Why is you ? I think What will first break |
|
| 44:41 | today? Because I need to go restroom. Sorry. So let's stop |
|
| 44:46 | on. Welcome back. About 10 . All right. Sorry about |
|
| 44:54 | I got much T Maria, you to try a recording? Stop. |
|
| 45:09 | . Okay. Thank you so |
|
