80th EAGE Conference and Exhibition 2018最新文献_第9页

Cretaceous Fan Complexes of the Western Flemish Pass Basin Offshore Newfoundland and Labrador, Canada 加拿大纽芬兰和拉布拉多近海西佛兰德山口盆地的白垩纪扇复合体

80th EAGE Conference and Exhibition 2018 Pub Date : 2018-06-11 DOI: 10.3997/2214-4609.201801083

E. Gillis, D. McCallum, L. Stead

引用次数: 0

Fracture Enhanced Chalk Matrix Permeability as a Driver for Completion Strategy. Curlew C Field, Block 29/7, UKCNS 裂缝提高白垩基质渗透率:完井策略的驱动因素Curlew C油田，29/7区块，UKCNS

80th EAGE Conference and Exhibition 2018 Pub Date : 2018-06-11 DOI: 10.3997/2214-4609.201801487

S. Large, A. McQueen, N. Stewart, T. Calder, D. Long, C. Lovelock

引用次数: 0

Investigation of Pillar Width Effect on Pillar Stability in Inclined Layers by Numerical Model, Hamkar Mine Field Study 利用数值模型研究倾斜岩层矿柱宽度对矿柱稳定性的影响，Hamkar矿山现场研究

80th EAGE Conference and Exhibition 2018 Pub Date : 2018-06-11 DOI: 10.3997/2214-4609.201801684

H. Ameri, M. Motahhari

引用次数: 0

Sparse Frequencies Data Inversion: an Application to a Near Surface Experiment 稀疏频率数据反演:在近地表实验中的应用

80th EAGE Conference and Exhibition 2018 Pub Date : 2018-06-11 DOI: 10.3997/2214-4609.201800679

T. Alkhalifah, B. Sun, Y. Choi, Faisal Alonaizi, M. Almalki

{"title":"Sparse Frequencies Data Inversion: an Application to a Near Surface Experiment","authors":"T. Alkhalifah, B. Sun, Y. Choi, Faisal Alonaizi, M. Almalki","doi":"10.3997/2214-4609.201800679","DOIUrl":"https://doi.org/10.3997/2214-4609.201800679","url":null,"abstract":"With an objective to invert for the subsurface velocity in the near surface rather than developing an image, we substitute the commonly used broadband acquisition scenario with a novel narrow band acquisition at coarse shot locations. We conduct the acquisition of narrow band seismic data, with an effect of 3 simultaneous sources vibrating at different bands (14-15 Hz, 24-25 Hz, and 49-50 Hz) of the frequency spectrum. The separation of the shot gathers corresponding to the simultaneous sources becomes natural as the shots fall in different bands of the frequency spectrum. The narrow band acquisition allows us to inject more energy of these frequencies using the same conventional vibrator sweep time (6 seconds). We mute regions of low signal-to-noise ratio, and then insert the data into a frequency domain waveform inversion algorithm. The inverted model down to 250 meters depth showed structure corresponding to a low velocity zone at around 80 meter depth. For comparison a conventional full sweep acquisition (30-170 Hz) at a dense shot spacing we recorded. We migrated this conventional dataset using the inverted model. The agreement between the inverted model and the image, extracted from the two independent datasets, supports the accuracy of the inverted model.","PeriodicalId":325587,"journal":{"name":"80th EAGE Conference and Exhibition 2018","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131385846","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: 6

Quantitative Interpretation of Frequency Decomposition Blends Using Forward Modelling: Thebe Discovery, NW Australia 利用正演模型定量解释频率分解混合:西比发现，澳大利亚西北部

80th EAGE Conference and Exhibition 2018 Pub Date : 2018-06-11 DOI: 10.3997/2214-4609.201801367

K. Kraus, P. Szafián, R. Bell

{"title":"Quantitative Interpretation of Frequency Decomposition Blends Using Forward Modelling: Thebe Discovery, NW Australia","authors":"K. Kraus, P. Szafián, R. Bell","doi":"10.3997/2214-4609.201801367","DOIUrl":"https://doi.org/10.3997/2214-4609.201801367","url":null,"abstract":"Summary Geological expression techniques including frequency decomposition are very powerful tools in understanding and risking reservoirs. A cognitive approach in visualising responses of different band-limited frequency volumes is through red-green-blue (RGB) colour blending. The non-unique colour responses are subject to a variety of complex interference patterns that are related to a number of geological factors: bed thickness, lithology, porosity, fluid content. This study presents a joint seismic forward modelling and frequency decomposition workflow on the Thebe gas discovery, offshore NW Australia to isolate and quantify the effects of hydrocarbon saturation on colour blends. Observations from real life blends are compared to equivalent synthetic models created through comprehensive rock physics modelling at two well locations; Thebe-1 and Thebe-2. Primary gas-bearing sand units within the Triassic Mungaroo Formation have been identified and are associated with a unique combination of high intensity frequency responses surrounded by a low frequency zone related to a pronounced gas-water contact. Sensitivity analysis through forward modelling has confirmed that fluid effects play a significant role in the frequency responses, and yield unique interference patterns in gas saturated sands. Frequency responses were used to establish spatial distribution of these gas-bearing sands to identify locations of ‘sweet-spots’ and de-risk development plans.","PeriodicalId":325587,"journal":{"name":"80th EAGE Conference and Exhibition 2018","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132370577","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

De-coupling Residual Statics and Velocity Picking 解耦剩余静力和速度拾取

80th EAGE Conference and Exhibition 2018 Pub Date : 2018-06-11 DOI: 10.3997/2214-4609.201801110

A. Darwish, R. Haacke, G. Poole

{"title":"De-coupling Residual Statics and Velocity Picking","authors":"A. Darwish, R. Haacke, G. Poole","doi":"10.3997/2214-4609.201801110","DOIUrl":"https://doi.org/10.3997/2214-4609.201801110","url":null,"abstract":"Summary Land surveys suffer from rapid variations in velocity in the near-surface weathering layer that degrade seismic images when the velocity variations are not accounted for in imaging. While elevation information or refraction tomography can compensate for long and mid-wavelength variations, residual static algorithms are used to correct for the shorter wavelengths. Residual statics are commonly estimated by maximising lateral coherency in gathers after Normal Move-Out corrections, either by measuring trace-to-trace correlation or overall stack power. This work introduces an alternative method able to estimate residual statics using a cost function based on sparseness in gathers without a-priori knowledge about velocities needed for NMO correction. By maximizing sparsity in the tau-v and tau-p domains the method enhances coherency assuming, respectively, hyperbolic reflections in the case of mid-wavelength residual statics and local linearity in the case of shorter wavelength residual statics. Results from 2D and 3D data show overall improvement in stack power and focus, as well as reflector positioning, when the sparseness method is used before picking velocities for imaging. To complete the flow, stack optimisation methods can be run as a post-process to further add constructively to the stack.","PeriodicalId":325587,"journal":{"name":"80th EAGE Conference and Exhibition 2018","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132536514","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

General Dislocation Model Based Microseismic Focal Mechanism Inversion in Frequency Domain 基于广义位错模型的频域微震震源机制反演

80th EAGE Conference and Exhibition 2018 Pub Date : 2018-06-11 DOI: 10.3997/2214-4609.201801093

H. Li, X. Chang, Z. Yao, Y. Wang

引用次数: 2

Deep Learning Based 3D Velocity Field Nonlinear Multiple Regression 基于深度学习的三维速度场非线性多元回归

80th EAGE Conference and Exhibition 2018 Pub Date : 2018-06-11 DOI: 10.3997/2214-4609.201800922

S. Wei, L. Jingye, Ouyang Yonglin, Z. Qingcai, Huang Jia-qiang, Song Yaying

引用次数: 0

Shear-wave Reflection Signal Recovery through Horizontal-geophone Azimuth Estimation 利用水平检波器方位估计恢复横波反射信号

80th EAGE Conference and Exhibition 2018 Pub Date : 2018-06-11 DOI: 10.3997/2214-4609.201801213

J. Daves, J. Simmons

引用次数: 1

A New Approach for Selection of Casing Seating Depths 套管下入深度选择的新方法

80th EAGE Conference and Exhibition 2018 Pub Date : 2018-06-11 DOI: 10.3997/2214-4609.201801682

M. Sabah, B. Ashrafi, M. Ameri, A. Shahriari

引用次数: 0