The characteristic of diagenetic compaction induced by multiform geodynamic mechanisms in reservoir: An example from Cretaceous sandstone reservoir in Kuqa depression, Tarim Basin
Han Denglin1,2, Zhao Ruizhe2, Li Zhong3, Li Weifeng1,2
1. Key Laboratory of Exploration Technologies for Oil and Gas Resources of the Ministry of Education, Yangtze University, Wuhan 430100;
2. College of Geosciences, Yangtze University, Wuhan 430100;
3. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029
Under superposition of vertical burial compaction and lateral compression compaction in Cretaceous sandstone reservoirs in Kuqa depression, Tarim Basin, the overall compaction effect in the reservoirs cannot be explained by classical vertical compaction theory. Through microscopically analysis of rock constituents and diagenetic characteristics in the reservoirs, the compaction effects controlled by vertical compaction and lateral compaction are analyzed and contrasted. The result shows that the overall compaction effect in the reservoirs is caused by vertical compaction mostly, and that caused by lateral compaction is less correspondingly. The proportion for pore loss caused by lateral compaction to pore loss made by total compaction is not positively correlated to intensity of compression stress. There are several important factors controlling the effect of lateral compaction in the reservoir. In addition to the intensity of compression stress, the relationship between time of lateral compression occurrence and vertical bury depth of the reservoir is a major concern as well.
. The characteristic of diagenetic compaction induced by multiform geodynamic mechanisms in reservoir: An example from Cretaceous sandstone reservoir in Kuqa depression, Tarim Basin[J]. Chinese Journal of Geology, 2015, 50(1): 241-248.