Research on optimization development technique for gas-cap and edge-water reservoir in Gang 172 falult block

Gang172 fault block is a gas-cap and edge-water structural reservoir,based on the gas-cap and edge-water energy research and analysis,the development program is identified.Firstly,make full use of gas cap and edge water energy to develop the pure oil area;secondly,use outer-edge water flooding to supplement the energy to develop the buffer area;finally,deepen the understanding of reservoir in the development process,to adjust development plan reasonably.Since the reservoir has been developed,the reservoir got 7 consecutive years of rapid and efficient development.From development analysis of main production index,such as oil production rate,stable production period,and recovery rate,Gang 172 fault block belongs to the class Ⅰ,it is expected that the final reservoir water flooding recovery up to 40.8%.Practice shows that this set of development program not only makes the gas and edge-water reservoir high recovery rate,but ensures a good development effect.