Development Geological Characteristics and Technical Countermeasures for Enhancing Recovery of Keshen 8 Gas Reservoir in Kuqa Depression

In recent years, ultra deep fractured gas reservoir is a hot spot of natural gas exploration and development in Tarim Basin. This type of gas reservoir has poor matrix properties, developed fractures, and is severely affected by water invasion, resulting in a low recovery rate. Taking KS 8 gas reservoir in Kuqa depression of Tarim Basin as an example, using seismic, logging, core, well testing and production dynamic data, this paper analyzes the geological characteristics and production performance of gas reservoir, and systematically puts forward technical countermeasures for water-control development to improve gas reservoir recovery. Keshen gas reservoir has tight matrix, naturally developed fractures. The pressure propagation between wells is fast due to the developed multi-scale fractures, showing good connectivity of sandstones reservoirs. The water body has the characteristics of strong in the west and weak in the east. In the west part of Keshen 8 gas reservoir. Direction of formation water intrusion can be divided into two paths: from west to east and from northwest to southeast, and the water intrusion velocity is reach 50 m/d. Development technology measures such as appropriate production rate, differential production allocation of gas wells, and active drainage of vertical and horizontal wells are put forward to enhance the recovery of the gas reservoir. This study can provide reference for the development of similar gas reservoirs.