KR20170018952A - 빠른 비스코어쿠스틱 및 점탄성 풀-파동장 반전 - Google Patents
빠른 비스코어쿠스틱 및 점탄성 풀-파동장 반전 Download PDFInfo
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Abstract
Description
도 2는 도 1의 일반화된 맥스웰 물체 모델에 대한 1, 2, 3, 및 5 완화 메커니즘들에 의해 계산된 예시적인 속도 분산 곡선들을 도시하는 도면.
도 3은 2.5 ㎐ 내지 40 ㎐의 대역에 걸쳐 선형으로 변하는 품질 팩터에 대해 최적화된 일반화된 맥스웰 물체 모델에 대한 1, 2, 3, 및 5 완화 메커니즘들에 기초한 예시적인 품질-팩터 모델들을 도시하는 도면.
도 4는 도 3의 일반화된 맥스웰 물체 모델에 대한 1, 2, 3, 및 5 완화 메커니즘들에 의해 계산된 예시적인 속도 분산 곡선들을 도시하는 도면.
도 5는 L = 3 및 L = 5 완화 메커니즘들에 대하여 종래의 3D 비스코어쿠스틱에 대한 전방에 관하여 수반의 비용(부동소수점 연산들-플롭들에 의해)의 비제한적인 예를 도시하는 도면.
도 6은 비스코어쿠스틱 풀-파동장 반전에 대한 일 예시적인 방법을 도시하는 도면.
도 7은 점탄성 풀-파동장 반전에 대한 일 예시적인 방법을 도시하는 도면.
도 8은 3 개의 완화 메커니즘 감쇠 모델에 의해 종래의 음향 전방 수식들의 해를 구하기 위한 비용에 관하여 본 기술적 진보에 따라 3-D 비스코어쿠스틱 전방 및 수반 수식들의 해를 구하기 위한 비용의 비제한적인 예를 도시하는 도면.
도 9는 L = 2, L = 3, 및 L = 5 완화 메커니즘 감쇠 모델들에 대해 종래의 수반에 대해 본 기술적인 진보에 따라 3-D 비스코어쿠스틱 수반에 대해 속도 향상의 비제한적인 예를 도시하는 도면.
도 10은 말모우시 속도 모델(스칼라 유닛은 ㎞/s이다)의 일 예를 도시하는 도면.
도 11은 품질-팩터 모델(스칼라 유닛은 품질 팩터의 역수에 대한 것이다)의 일 예를 도시하는 도면.
도 12는 반전된 속도 모델(스칼라 유닛은 ㎞/s이다)의 일 예를 도시하는 도면.
도 13은 반전된 품질-팩터 모델(스칼라 유닛은 품질 팩터의 역수에 대한 것이다)의 일 예를 도시하는 도면.
도 14는 반복들의 수에 의해 목적 함수(데이터 불일치의 최소 제곱 평균)의 변화의 일 예를 도시하는 도면.
도 15는 본 기술적인 진보를 구현하는 방법들을 실행할 수 있는 컴퓨터의 일 예를 도시하는 도면.
Claims (14)
- 방법에 있어서,
컴퓨터에 의해 초기 지구물리학적 모델을 획득하는 단계,
상기 컴퓨터에 의해, 비스코어쿠스틱(viscoacoustic) 또는 점탄성 파동식들로 전방 파동장을 모델링하는 단계,
상기 컴퓨터에 의해, 수반 비스코어쿠스틱(adjoint viscoacoustic) 또는 수반 점탄성 파동식들로 수반 파동장을 모델링하는 단계로서, 각각, 상기 수반 비스코어쿠스틱 파동식들은 압력 및 메모리 변수의 함수인 보조 변수에 기초하거나 상기 수반 점탄성 파동식들은 각각 응력 및 메모리 변수의 조합에 기초하는, 상기 수반 파동장을 모델링하는 단계;
상기 컴퓨터에 의해, 상기 전방 파동장의 모델 및 상기 수반 파동장의 모델의 조합에 기초하여 비용 함수의 기울기를 획득하는 단계; 및
상기 컴퓨터에 의해 상기 초기 지구물리학적 모델을 갱신하고 갱신된 지구물리학적 모델을 획득하기 위해 상기 비용 함수의 상기 기울기를 사용하는 단계를 포함하는, 방법. - 제 1 항에 있어서,
메모리 변수들의 공간 도함수들을 상기 수반 비스코어쿠스틱 또는 점탄성 파동식들로부터 빼기 위해 상기 보조 변수를 사용하는 단계를 추가로 포함하는, 방법. - 제 1 항 또는 제 2 항에 있어서,
상기 지구물리학적 모델을 획득하는 단계는 초기 유동학적 모델 및 음향 또는 탄성 매체 파라미터들을 사용하여 제공된 품질 팩터에 대해 완화 파라미터들을 획득하는 단계를 포함하는, 방법. - 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,
상기 수반 파동장은 상기 수반 비스코어쿠스틱 수식들을 사용하여 모델링되는, 방법. - 제 1 항 내지 제 6 항 중 어느 한 항에 있어서,
상기 수반 파동장은 상기 수반 점탄성 수식들을 사용하여 모델링되는, 방법. - 제 8 항에 있어서,
상기 수반 점탄성 식들은
이고,
t는 시간이고,
는 수반 응력이고, ,
는 수반 속도이고,
는 메커니즘(l)에 대한 수반 메모리 필드이고,
이고,
는 메커니즘(l)에 대해 명확하게 규정된 변수이고,
이고,
ρ는 질량 밀도이고,
및 는 응력 및 속도 각각에 관한 목적 함수()의 도함수들이고,
, 이는 라메 상수들(Lame constants; λ, μ)에 관해 등방성 긴장 시스템에 대한 탄성 구조 관계이고,
, 이는 상기 메모리 시스템에 대한 구조 관계이고(는 식(9)을 사용하여 압축 및 왜파(shear wave) 품질 팩터로부터 계산된다), = 스트레인 연산자이고,
이고,
는 비용 함수이고, 는 모델 파라미터들(즉, QP, QS 또는 , λ, μ 및 ρ의 몇몇 조합)인, 방법 - 제 1 항 내지 제 9 항 중 어느 한 항에 있어서,
탄화 수소들을 관리하기 위해 갱신된 지표 아래 모델을 사용하는 단계를 추가로 포함하는, 방법. - 제 1 항 내지 제 10 항 중 어느 한 항에 있어서,
상기 지구물리학적 모델은 속도 모델을 포함하는, 방법. - 제 1 항 내지 제 11 항 중 어느 한 항에 있어서,
상기 지구물리학적 모델은 품질 팩터 모델을 포함하는, 방법. - 제 1 항 내지 제 12 항 중 어느 한 항에 있어서,
상기 보조 변수는 복수의 완화 메커니즘들에 기초하는, 방법. - 제 1 항 내지 제 13 항 중 어느 한 항에 있어서,
상기 비스코어쿠스틱 또는 점탄성 파동식들은 상기 보조 변수에 기초하는, 방법.
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| Application Number | Priority Date | Filing Date | Title |
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| US201462013455P | 2014-06-17 | 2014-06-17 | |
| US62/013,455 | 2014-06-17 | ||
| PCT/US2015/027087 WO2015199800A1 (en) | 2014-06-17 | 2015-04-22 | Fast viscoacoustic and viscoelastic full-wavefield inversion |
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| EP (1) | EP3158367A1 (ko) |
| KR (1) | KR20170018952A (ko) |
| CN (1) | CN106662664A (ko) |
| AU (1) | AU2015280633B2 (ko) |
| BR (1) | BR112016024506A2 (ko) |
| CA (1) | CA2947410A1 (ko) |
| MX (1) | MX362753B (ko) |
| RU (1) | RU2016150545A (ko) |
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| US10067254B2 (en) | 2015-02-16 | 2018-09-04 | Pgs Geophysical As | Removal of an estimated acquisition effect from a marine survey measurement |
| US10670751B2 (en) * | 2015-03-27 | 2020-06-02 | Cgg Services Sas | Full waveform inversion method for seismic data processing using preserved amplitude reverse time migration |
| KR102020759B1 (ko) * | 2015-10-02 | 2019-09-11 | 엑손모빌 업스트림 리서치 캄파니 | Q-보상된 전 파동장 반전 |
| CN105549080B (zh) * | 2016-01-20 | 2017-08-25 | 中国石油大学(华东) | 一种基于辅助坐标系的起伏地表波形反演方法 |
| WO2018013257A1 (en) | 2016-07-13 | 2018-01-18 | Exxonmobil Upstream Research Company | Joint full wavefield inversion of p-wave velocity and attenuation using an efficient first order optimization |
| MX2019001685A (es) * | 2016-08-19 | 2019-06-03 | Halliburton Energy Services Inc | Inversion de forma de onda completa de datos de pefil sismico vertical para velocidades anisotropicas usando ecuaciones de ondas pseudo-acusticas. |
| US11487036B2 (en) * | 2017-01-12 | 2022-11-01 | Cgg Services Sas | Reflection full waveform inversion methods with density and velocity models updated separately |
| US11237283B2 (en) * | 2017-07-13 | 2022-02-01 | Exxonmobil Upstream Research Company | Visco-pseudo-elastic TTI FWI/RTM formulation and implementation |
| US10788597B2 (en) * | 2017-12-11 | 2020-09-29 | Saudi Arabian Oil Company | Generating a reflectivity model of subsurface structures |
| CN108241173B (zh) * | 2017-12-28 | 2019-06-21 | 中国石油大学(华东) | 一种地震资料偏移成像方法及系统 |
| CN108646293B (zh) * | 2018-05-15 | 2020-01-31 | 中国石油大学(华东) | 基于黏声拟微分方程的黏声起伏地表正演模拟系统及方法 |
| US11340366B2 (en) | 2018-10-17 | 2022-05-24 | Exxonmobil Upstream Research Company | Accurate velocity model estimation and imaging in the presence of localized attenuation (Q) anomalies |
| CN111665551B (zh) * | 2019-03-07 | 2023-05-02 | 中普宝信(北京)科技有限公司 | 用于桥梁基底探测的声学参数获取方法 |
| CN111665547A (zh) * | 2019-03-07 | 2020-09-15 | 中普宝信(北京)科技有限公司 | 地层声波波阻抗信息反演方法 |
| CN111665555A (zh) * | 2019-03-07 | 2020-09-15 | 中普宝信(北京)科技有限公司 | 拉梅参数反演方法 |
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| CN111665556B (zh) * | 2019-03-07 | 2023-05-02 | 中普宝信(北京)科技有限公司 | 地层声波传播速度模型构建方法 |
| CN111665554A (zh) * | 2019-03-07 | 2020-09-15 | 中普宝信(北京)科技有限公司 | 用于石油探测的声学参数获取方法 |
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