【摘要】 济阳坳陷孤东油田七区西区块新近系馆陶组Ng5²⁺³砂层是典型的正韵律曲流河点坝砂体,砂体平均孔隙度为34%,平均空气渗透率为1 767×10^-3μm²,储层物性好,但非均质性较强;经过长期水驱开发后,Ng5²⁺³砂层水窜严重、注水效率低、井口产液平均综合含水达98.2%,产油量持续降低,亟需采取措施提高剩余油采收率,稳定原油产量。通过油藏地质研究,结合示范区井网流场调整实验,得出采取转九点法井网的方式,改变井下流体流场方向,可以达到非均质高含水油藏控水稳油、提高剩余油采收率的目的。研究成果对我国东部类似高含水断块油藏的开发措施的选择具有借鉴意义。更多还原

【Abstract】 The Neogene Guantao formation Ng5^{2 + 3} sand layer in the west block of block 7 of Gudong oilfield in Jiyang depression is a typical positive rhythm meandering river point bar sand body. The average porosity of the sand body is 34%, and the average air permeability is 1 767 × 10^-3μm². The reservoir has good physical properties but strong heterogeneity. After long-term water drive development, the Ng5^{2 + 3} sand layer has serious water channeling, low water injection efficiency, average comprehensive water cut of wellhead produced fluid up to 98.2%, and the oil production continues to decrease. It is urgent to take measures to improve the remaining oil recovery and stabilize the crude oil production. Through the reservoir geology research, combined with the well pattern flow field adjustment experiment in the demonstration area, it is concluded that the purpose of controlling water and stabilizing oil and improving the recovery rate of remaining oil in heterogeneous high water cut reservoir can be achieved by changing the direction of downhole fluid flow field by adopting the nine point well pattern method. The research results can be used for reference in the selection of development measures for similar high water cut fault block reservoirs in eastern China.更多还原