Development Model and Prediction of Fault-related Fractures—A Case Study of the Third Member of Shahejie Formation in Dongpu Depression
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2018年第03期
- Page:
- 308-321
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Development Model and Prediction of Fault-related Fractures—A Case Study of the Third Member of Shahejie Formation in Dongpu Depression
- Author(s):
- LIU Wei-bin; ZHANG Shi-qi; XU Xing-you; ZHOU Xin-gui; CHEN Shan; BAI Jing; LI Shi-zhen
- 1. Oil and Gas Survey, China Geological Survey, Beijing 100029, China; 2. School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China
- Keywords:
- petroleum geology; fault; fracture; main controlling factor; fault-stratum ratio; tight sandstone; the third member of Shahejie Formation; Dongpu depression
- PACS:
- P542;TE121.2
- DOI:
- -
- Abstract:
- The sandstone in the third member of Shahejie Formation characterized by low porosity and low permeability is the main reservoir in Dongpu depression, in which the fault-related fractures are well-developed; the fracture is an important factor for the formation of favorable reservoirs. In order to illustrate the development model and distribution law of fault-related fractures, the characteristics, main controlling factors, development model and petroleum geological significance of fault-related fractures were analyzed by utilizing the core overview, seismic interpretation, image logging and experiment; and then, the fault-stratum ratio was raised to forecast the distribution law of fault-related fractures. The results show that the fault-related fractures are formed mostly towards NNE and NE; the late stage of the third member of Shaheije Period and the late stage of Dongying Period are their major formation periods, which are consistent with mechanical property and formation period of faults; the development of fault-related fractures decreases exponentially with the distance away from the faults as a whole, and the density of fractures in the hanging wall is greater than that in the footwall; the width and intensity of fault-related fractures have a positive correlation with the scale of faults; fault-related fractures can improve the property, oil-bearing probability and capacity of the low-porosity and low-permeability reservoir dramatically; the area with fault-stratum ratio greater than 10 defined is the favorable area of fault-related fractures, and five favorable reservoir areas are predicted by using fault-stratum ratio parameter method.
Last Update: 2018-06-05