Development characteristics of typical bottom water gas reservoirs and enlightenment of suitable development countermeasures
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TE349

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    Abstract:

    The gas reservoirs of the second Member of Dengying Formation both in Gaoshiti-Moxi area and Taihe gas area have strong heterogeneity and multi-scale fractures and pores(caves),showing the characteristics of fracture-cavity gas reservoirs with bottom water. It is difficult to develop such reservoirs due to the rapid intrusion of bottom water along the fractures and caves and no effective technologies for reference. In order to scientifically develop such fractured gas reservoirs with bottom water and provide technical reference for other gas reservoirs with bottom water,this paper takes the development characteristics of typical gas reservoirs bottom with water both in China and abroad as the research object,deeply analyzes the development status,geological characteristics and development technologies of various gas reservoirs with bottom water,clarifies the main controlling factors affecting the the reservoir recovery and summarizes the technologies for controlling water in the reservoirs. In addition,the paper puts forward appropriate strategies for developing fracture-cavity bottom water gas reservoirs with strong heterogeneity. The study found that the the fractures,interlayers and water energy are the main geological factors that affect the development effect of the reservoirs. Furthermore,the reservoir recovery can be improved by deepening the understanding of gas reservoir characteristics. Reasonable technical technologies can slow down non-uniform bottom water intrusion. Balanced production is the key to realizing the efficient development of fracturecavity gas reservoirs with bottom water. Specific technical strategies are as follows. ①The distribution law of fractures and caves in the reservoirs shall be precisely depicted by a well-seismic combination,and the understanding of the geological characteristics of the reservoirs shall be continuously deepened under dynamic and static conditions. ②The reasonable technical limits shall be made to strengthen the monitoring and management of the reservoirs. ③The prediction and simulation systems for the water intrusion in the reservoirs shall be constructed to develop a water control strategy for the whole life cycle of the reservoirs.

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HUI Dong, HU Yong, LI Tao, PENG Xian, LI Qian, ZHAO Zihan. Development characteristics of typical bottom water gas reservoirs and enlightenment of suitable development countermeasures[J]. Petroleum Geology and Recovery Efficiency,2023,30(1):101~111

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  • Received:
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  • Online: February 13,2023
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