Study on Water Energy Calculation and Evaluation of Typical Fracture System in Tight Gas Reservoir
The Sichuan Basin is rich in natural gas resources.The types of gas reservoirs cover 94％of the known categories,and most of the gas reservoirs have formation water.During the development process,the main gas reservoirs in each period have the phenomenon of active water invasion.The production of gas wells decreases rapidly after water production,and 30％of gas wells rely on drainage gas production.The formation water invades the gas reservoir to block the gas production channel and greatly reduce the recovery rate.The primary recovery rate of the strong water invasion gas reservoir in the Sichuan Basin is generally not higher than 30％after the natural force production.Therefore,the final recovery rate of gas reservoir can be improved by clarifying the distribution of water body,calculating the energy of water body scientifically and guiding the scientific exploitation of gas reservoir.
tight gas reservoirwater energyimproved water invasion volume coefficient method
万方数据
维普
