江苏油田复杂断块低渗透油藏压驱研究与实践

Research and practice of pressure flooding in low-permeability reservoirs of complex fault block in Jiangsu Oilfield

针对江苏油田复杂断块低渗透油藏特点,开展了压驱技术研究与应用,确定了压驱选井条件,优选了H59井区作为研究对象,利用cmg软件模拟实现压驱的造缝机理、渗吸机理及低渗透油藏的压敏效应。在数值模拟、物质平衡分析的基础上,确定H59井区压驱井注入量3×10^(4)m^(3),日注入速度控制在600 m^(3)以下。研究成果为复杂断块低渗透油藏改善开发效果提供了新思路。

According to the characteristics of low permeability reservoirs with complex fault blocks in Jiangsu Oilfield,it was carried out research and application of pressure flooding technology.The well selection conditions of pressure flooding were determined,and well area H59 was preferred as the research object.And the CMG software was used to simulate the fracture-forming mechanism,imbibition mechanism and pressure sensitive effect of low-permeability reservoir in pressure flooding.Based on numerical simulation and material balance analysis,the injection volume of pressure-driven wells in the H59 well area was determined to be 3×10^(4) m^(3),and the daily injection rate was controlled to be below 600m^(3).The research results provide a new idea for improving the development effect of lowpermeability reservoirs with complex fault blocks.