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Petroleum Science >2013,??Issue 2:??171-182 DOI: https://doi.org/10.1007/s12182-013-0264-7

Geological characteristics and accumulation mechanisms of the “continuous” tight gas reservoirs of the Xu2 Member in the middlesouth transition region, Sichuan Basin, China Open?Access

文章信息

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作者：Zou Caineng,Gong Yanjie,Tao Shizhen and Liu Shaobo
作者單位：

Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China; State Key Laboratory of Enhanced Oil Recovery, Beijing 100083, China;Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China; State Key Laboratory of Enhanced Oil Recovery, Beijing 100083, China;Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China;Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China; State Key Laboratory of Enhanced Oil Recovery, Beijing 100083, China

投稿時(shí)間：2011-09-02
引用方式：Zou, C., Gong, Y., Tao, S. et al. Pet. Sci. (2013) 10: 171. https://doi.org/10.1007/s12182-013-0264-7

文章摘要

“Continuous” tight gas reservoirs are those reservoirs which develop in widespread tight sandstones with a continuous distribution of natural gas. In this paper, we summarize the geological features of the source rocks and “continuous” tight gas reservoirs in the Xujiahe Formation of the middlesouth transition region, Sichuan Basin. The source rocks of the Xu1 Member and reservoir rocks of the Xu2 Member are thick (Xu1 Member: 40 m, Xu2 Member: 120 m) and are distributed continuously in this study area. The results of drilled wells show that the widespread sandstone reservoirs of the Xu2 Member are charged with natural gas. Therefore, the natural gas reservoirs of the Xu2 Member in the middle-south transition region are “continuous” tight gas reservoirs. The accumulation of “continuous”
tight gas reservoirs is controlled by an adequate driving force of the pressure differences between source rocks and reservoirs, which is demonstrated by a “one-dimensional” physical simulation experiment. In this simulation, the natural gas of “continuous” tight gas reservoirs moves forward with no preferential petroleum migration pathways (PPMP), and the natural gas saturation of “continuous” tight gas reservoirs is higher than that of conventional reservoirs.

關(guān)鍵詞

    Geological characteristics, accumulation mechanism, “continuous” tight gas reservoir, Xu2 Member, middle-south transition region, Sichuan Basin