82nd EAGE Annual Conference & Exhibition最新文献_第2页

Simultaneous velocity and reflectivity inversion: FWI + LSRTM 同时反演速度和反射率:FWI + LSRTM

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202113278

Y. Yang, J. Ramos-Martínez, D. Whitmore, G. Huang, N. Chemingui

{"title":"Simultaneous velocity and reflectivity inversion: FWI + LSRTM","authors":"Y. Yang, J. Ramos-Martínez, D. Whitmore, G. Huang, N. Chemingui","doi":"10.3997/2214-4609.202113278","DOIUrl":"https://doi.org/10.3997/2214-4609.202113278","url":null,"abstract":"Summary We present an iterative non-linear inversion method to simultaneously estimate both velocity and reflectivity. The core of the inversion workflow is a full acoustic wavefield modeling relation parameterized in terms of velocity and vector reflectivity. A key aspect is the separation of the low- and high-wavenumber components of the gradient based on inverse scattering theory, enabling the sensitivity kernels to update the velocity and the vector reflectivity, respectively. The estimation problem is formulated as a multi-parameter adjoint-state inversion where the trade-off between velocity and reflectivity is minimized through scale separation. Our approach is equivalent to performing Full Waveform Inversion (FWI) and Least-Squares Reverse Time Migration (LSRTM) in a single framework using the full wavefield. The output of the inversion is a detailed velocity model together with an accurate estimate of the earth reflectivity with compensation for incomplete acquisition, poor illumination, and multiple crosstalk. The new approach reduces the turnaround time of imaging projects by combining velocity model building (FWI) and imaging (LSRTM) into a single inversion process with minimal data pre-processing.","PeriodicalId":265130,"journal":{"name":"82nd EAGE Annual Conference & Exhibition","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128728484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

A case study of shallow marine survey for geohazard risk evaluation, offshore Iran 伊朗近海浅海地质灾害风险评价调查案例研究

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202113234

M. Shahnazi, H. Nezamoleslami, E. Baniasadi, H. Daneshvar, A. R. Nayeh, M. Etminan, B. Heidari

{"title":"A case study of shallow marine survey for geohazard risk evaluation, offshore Iran","authors":"M. Shahnazi, H. Nezamoleslami, E. Baniasadi, H. Daneshvar, A. R. Nayeh, M. Etminan, B. Heidari","doi":"10.3997/2214-4609.202113234","DOIUrl":"https://doi.org/10.3997/2214-4609.202113234","url":null,"abstract":"Summary Detecting shallow geohazard risk is one of the critical challenging issues during well drilling for gas fields development. 3D conventional seismic surveys typically contain information from deep parts, since they are designed for deep reservoir targets. In current study, several 2D high resolution seismic data with dense line spacing were acquired for shallow geohazard evaluation over a shallow marine gas field, offshore Iran. Such data is beneficial in terms of available near offset information which are necessary for shallow marine hazards evaluations. On the other hand, 2D imaging cannot be accurate to distinguish correct subsurface location of the drilling hazardous features. In this situation, pseudo- 3D migration is an appropriate method to achieve the correct subsurface image with more details relative to 3D conventional seismic. Pseudo-3D cube generation also has some other advantages that can be profitable in seismic data interpretation including: 3D attribute calculation, surface (horizon) attribute estimation, 3D geo-body extraction and accelerating seismic data interpretation procedure.","PeriodicalId":265130,"journal":{"name":"82nd EAGE Annual Conference & Exhibition","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124672636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitatively Evaluating the Preservation of Deep-water Channel Architecture using 3D Synthetic Seismic from Outcrop 利用露头三维合成地震定量评价深水航道建筑的保存

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202113320

T. Langenkamp, L. Stright, S. Hubbard, B. Romans

{"title":"Quantitatively Evaluating the Preservation of Deep-water Channel Architecture using 3D Synthetic Seismic from Outcrop","authors":"T. Langenkamp, L. Stright, S. Hubbard, B. Romans","doi":"10.3997/2214-4609.202113320","DOIUrl":"https://doi.org/10.3997/2214-4609.202113320","url":null,"abstract":"Summary Forward seismic reflectivity models can be used to interpret depositional architecture and stratal surfaces. However, such studies often stop short at a qualitative assessment of the link between underlying depositional architecture and seismic resolvability, lacking a quantitative assessment. This study addresses this gap with a direct quantitative comparison of 3-dimensional facies architecture predicted from seismic with a “ground truth” to quantify heterogeneity facies associations and architecture preserved in inverted seismic data. The primary goal is to quantify how facies architecture information is preserved in and predicted from inverted seismic reflectivity data. The objective is to explore what the variables are that impact correct vs incorrect facies classification. With increasing seismic frequency, channel axis becomes harder to predict while mass transport deposits became easier to predict. Facies in shallow reservoirs are easier to predict than in deep reservoirs. Disorganized channel systems show greater facies predictability than organized systems due to greater AI contrasts. This study highlights what architectural information is preserved in 3-dimensional inverted seismic data, built from outcrop data of a deep-water system, which can aid directly in interpretation, reservoir prediction, and modelling.","PeriodicalId":265130,"journal":{"name":"82nd EAGE Annual Conference & Exhibition","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124772161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Removal of frequency notches in marine seismic data acquired by a deeply towed source 深拖曳震源采集的海洋地震数据中频率缺口的去除

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202113157

H. Ozasa, J. Takekawa, H. Mikada

引用次数: 0

Joint Bayesian stochastic AVA inversion of well-log and seismic data for facies estimation 测井和地震资料联合贝叶斯随机AVA反演相估计

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202113086

Y. Luo, Y. Chen, P. Chen, J. Cui, L. Li, Z. Wan, H. Xue

引用次数: 0

Implicit 3D Subsurface Structural Modeling by Finite Elements 隐式三维地下结构有限元建模

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202113091

M. Irakarama, M. Thierry-Coudon, M. Zakari, P. Anquez, G. Caumon

引用次数: 2

An Integrated Formation Evaluation Approach Evaluated the Basement Temperature Anomaly 地层综合评价方法评价基底温度异常

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202113281

C. Ciuperca, C. Bădulescu, M. Erlström, E. Mats, A. Hammar

{"title":"An Integrated Formation Evaluation Approach Evaluated the Basement Temperature Anomaly","authors":"C. Ciuperca, C. Bădulescu, M. Erlström, E. Mats, A. Hammar","doi":"10.3997/2214-4609.202113281","DOIUrl":"https://doi.org/10.3997/2214-4609.202113281","url":null,"abstract":"Summary A holistic formation evaluation approach to characterizing the naturally open fractures zones explained the basement negative temperature anomaly occurrence. For this purpose, using measurements of high resolution dual slim imager, acoustic cross-dipole, density, photoelectric factor, spectral gamma ray and temperature, few formation evaluation techniques were applied, such as structural facies identification, fracture aperture calculation, sonic anisotropy, brittleness index magnitude and polarity, Stoneley fracture identification, which, coupled with mudlogging data offered a conprehensive understanding of the naturally occurring fractured zones over the thermal conductivity anomaly. The presence of fractured facies identified on borehole images, decrease of density values, the occurrence of sonic anisotropy, changes in the brittleness index polarity, increase of the fracture density, increase of the fracture aperture and the presence of Stoneley reflection chevrons were used as arguments of water influx through conjugated open natural fracture system which generated the negative thermal anomaly.","PeriodicalId":265130,"journal":{"name":"82nd EAGE Annual Conference & Exhibition","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126448150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Generative Adversarial Network for Seismic Data Interpolation 地震数据插值的生成对抗网络

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202113135

Q. Wei, X. Li

引用次数: 1

Sediment Cover Structure in the East Siberian Sea Shelf–Podvodnikov Basin Transition Zone (Arctic Ocean) 东西伯利亚海陆架-波德瓦德尼科夫盆地过渡带(北冰洋)沉积物覆盖结构

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202011725

A. Piskarev, A. Atakov, M. Sergeev, O. Smirnov

引用次数: 0

Mineral Prospecting for Copper-Molybdene Ores in Northern Kazakhstan Using Electromagnetic Sensing and Induced Polarization Technology (EMS-IP) 利用电磁传感与感应极化技术找矿哈萨克北部铜钼矿

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202010238

A. Belova, Y. Davydenko, D. Gurevich, A. Bashkeev, S. Bukhalov, P. Veeken

{"title":"Mineral Prospecting for Copper-Molybdene Ores in Northern Kazakhstan Using Electromagnetic Sensing and Induced Polarization Technology (EMS-IP)","authors":"A. Belova, Y. Davydenko, D. Gurevich, A. Bashkeev, S. Bukhalov, P. Veeken","doi":"10.3997/2214-4609.202010238","DOIUrl":"https://doi.org/10.3997/2214-4609.202010238","url":null,"abstract":"Summary Geoelectric techniques are applied to identify geobodies in the shallow subsurface (<1km) that correspond to commercial ore deposits (copper-molybdene) in Kazakhstan. A combined CSEM and Induced Polarisation method is chosen to delineate anomalies in the underground. Resistivity and polarisation effects prove diagnostic. The workflow comprises steps like: EM acquisition, quality control and data preconditioning, inversion, interpretation and Principle Component Analysis. Inversion processing is done via a finite elements method solving the Cole-Cole formula simulating Maxwell’s equations. 1D inversion results serve as input for the 3D inversion. Principle Component Analysis (n-dimensional clustering and distance weighting) and computation of composite geoelectric parameters enhance the discrimination power. EM anomalies are circular (hydrothermal injection feature) and/or elongate in shape. Fracture zones and faults provide conduits/barriers and govern hydrothermal processes. Faulting in part controls the outline of the segmented IP anomalies. Three shallow well locations were proposed based on the EMS-IP data. Two of these boreholes demonstrate elevated polarisation phenomena: copper-molybdene metal ore in MN17 and pyrite enrichment in MN16. The mapped geobodies based on EM anomalies give complementary information on volume and distribution of the mineral resources. EMS-IP is a cost-effective investigation tool that deserves more attention in geoscience projects.","PeriodicalId":265130,"journal":{"name":"82nd EAGE Annual Conference & Exhibition","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130248510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1