Citation: | XIA Yongtao, WANG Ren, YANG Hongcai, SHI Wanzhong, BAHETIYAER Ainiwaer, QIN Shuo, ZHANG Xiao, XU Zhuang. Characteristics and main controlling factors of the tight sandstone reservoirs around the paleo-uplift in the southern Tianshan area, Tarim Basin[J]. Bulletin of Geological Science and Technology, 2024, 43(2): 16-27. doi: 10.19509/j.cnki.dzkq.tb20220592 |
The main controlling factors and densification genesis of sandstone reservoirs around the paleo-uplift in the southern Tianshan area of the Tarim Basin have always restricted the increase in reserves and production in this area.
By using thin section and cathode luminescence (CL) observations, physical property testing, mercury injection analysis, and other related methods, the characteristics of sandstone reservoirs in the Lower Cretaceous Baxigai and Shushanhe Formations were studied, and the main factors controlling the reservoir properties were also summarized.
The study draws the following conclusions: The porosity of the target layer in the study area is mostly less than 10%, and the permeability is less than 1×10-3 μm2, which is a typical tight sandstone reservoir. Among them, the braided river delta sandstones exhibit the best physical properties (
These results provide a reference for petroleum exploration and development of the Lower Cretaceous successions in the southern Tianshan area.
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