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Carbonate fractured gas reservoir prediction based on P-wave azimuthal anisotropy and dispersion
Cao,Zhanning1,2; Li,Xiang-Yang1,3,4; Liu,Jun5; Qin,Xilin1,3; Sun,Shaohan6; Li,Zongjie5; Cao,Zhanyuan7
2018-06-26
Source PublicationJournal of Geophysics and Engineering
ISSN1742-2132
Volume15Issue:5
AbstractAbstract Carbonate fractured gas reservoir detection is very significant for the process of oil-gas exploration. It is difficult to characterize the reservoirs properly by traditional post-stack seismic attributes, because of the complexity of mineralogical composition and fluid type. Based on rock physics, it becomes possible to effectively solve this problem. In this paper, we combine seismic azimuthal anisotropy analysis and P-wave (primary wave) dispersion inversion based on the appropriate rock physics model in order to provide a method for carbonate fractured gas reservoir prediction. Firstly, referring to the geology and logging data of a carbonate fractured reservoir in the S area of Tarim basin in western China, we introduce the Voigt–Reuss–Hill theory into the Chapman model and set up an appropriate model which includes the influences of lithology and physical and fluid properties. Then, through seismic forward modeling and inversion based on this model, we find that attenuation azimuthal anisotropy is very sensitive to fracture density, and P-wave dispersion is closely linked to fluid type. By comprehensive analysis of these two attributes, we can characterize the reservoirs well. Finally, both attributes were applied to analysis of seismic field data for carbonate gas reservoir discrimination in the S area of the Tarim basin. The results show that zones with strong attenuation anisotropy and intense P-wave dispersion are likely to be favorable gas reservoirs. This is consistent with trial production data, hence demonstrating the great advantages of our method in carbonate gas exploration.
Keywordrock physics carbonate seismic anisotropy reservoir description fluid detection
DOI10.1088/1742-2140/aabe58
Language英语
WOS IDIOP:1742-2132-15-5-aabe58
PublisherIOP Publishing
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90307
Collection兰州油气中心
Affiliation1.State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, People’s Republic of China
2.Tianjin Center, China Geological Survey, Tianjin 300170, People’s Republic of China
3.CNPC Key Laboratory of Geophysical Prospecting, China University of Petroleum, Beijing 102249, People’s Republic of China
4.British Geological Survey, The Lyell Centre, Research Avenue South, Edinburgh EH14 4AP, United Kingdom
5.Search Institute of Exploration and Development, Northwest Company, SINOPEC, Urumqi 830011, People’s Republic of China
6.Geophysical Technology Research Center, BGP Inc. of CNPC, Zhuozhou 072751, People’s Republic of China
7.Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China
Recommended Citation
GB/T 7714
Cao,Zhanning,Li,Xiang-Yang,Liu,Jun,et al. Carbonate fractured gas reservoir prediction based on P-wave azimuthal anisotropy and dispersion[J]. Journal of Geophysics and Engineering,2018,15(5).
APA Cao,Zhanning.,Li,Xiang-Yang.,Liu,Jun.,Qin,Xilin.,Sun,Shaohan.,...&Cao,Zhanyuan.(2018).Carbonate fractured gas reservoir prediction based on P-wave azimuthal anisotropy and dispersion.Journal of Geophysics and Engineering,15(5).
MLA Cao,Zhanning,et al."Carbonate fractured gas reservoir prediction based on P-wave azimuthal anisotropy and dispersion".Journal of Geophysics and Engineering 15.5(2018).
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