港西油田港172断块气顶边水油藏高效开发技术研究

港172断块是一个气顶边水构造油气藏,通过对其气顶和边水能量的研究分析,确定了该断块的开发程序。首先充分利用气顶和边水能量,开发动用纯油区;此后边外注水补充地层能量开发动用缓冲区;最后在开发过程中深化认识油藏,合理调整开发方案。投入开发以来,该油藏获得了连续7年的高速高效开发。从采油速度、稳产年限、采收率等油藏开发主要指标分析,港172断块属于一类开发水平,预计最终油藏水驱采收率可达40.8%。开发实践表明,这套开发方式不仅使该类油藏有较高的开采速度,而且确保达到了良好的开发效果。

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.