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- Title
川中地区安岳气田走滑断裂对灯影组储层及含气富集的控制作用.
- Authors
张旋; 冉崎; 陈康; 张本健; 张晨; 马兵山; 马乾; 吴仕虎
- Abstract
The central Sichuan Basin and the Tarim Basin have a similar tectonic background for the development of strike-slip faults, and there are a large number of strike-slip faults. Therefore, it is important to clarify the controlling effect of strike-slip faults on reservoirs and gas enrichment, which is of great significance for the efficient production in Anyue Gas Field. However, the Anyue Gas Field is also faced with the complicated accumulation model (mound beach + karst + fault), and it is difficult to analyze the single factor of the fault. Therefore, based on the comprehensive study of sedimentation and karst, this paper identifies three different types of similar sedimentary and karst backgrounds. In the block, single-factor analysis is carried out for the controlling effect of strike-slip faults on reservoirs and gas enrichment, so that the analysis results are more reasonable and reliable. The research results show that: (1) Dengying Formation reservoir development is jointly controlled by sedimentation and karst paleo-geomorphology, and is the main controlling factor; (2) Strike-slip faults have a certain improvement effect on reservoir development, and their improvement effects have the characteristics of zoning and zoning, that is, the improvement degree of the intra-platform area is stronger than that of the platform margin area; (3) Under the same sedimentary and karst background, strike-slip faults have a normal distribution controlling effect on the permeability of the reservoir, and the permeability increased rapidly within the range of 0-2 km, and the permeability can increase locally by 2-3 orders of magnitude; (4) Strike-slip faults have obvious controlling effect on gas enrichment, and the relationship between production and fault distance is in a normal distribution pattern. Its controlling effect is mainly manifested by faults transforming the reservoir permeability, and at the same time, the secondary structures are formed by fault activities. It is a favorable area for oil and gas migration. It is concluded that the sedimentation and karst paleomorphology in the Anyue gas field are the basis for the development of the reservoir, and strike-slip faults have a significant effect on the improvement of permeability and productivity. Therefore, strike-slip faults are one of the key factors for the development, evaluation, deployment and efficient production in the Anyue Gas Field.
- Subjects
SICHUAN Sheng (China); GAS reservoirs; GAS migration; GAUSSIAN distribution; KARST; PERMEABILITY; GEOMORPHOLOGY; STRIKE-slip faults (Geology)
- Publication
Natural Gas Geoscience, 2022, Vol 33, Issue 6, p917
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2021.11.009