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S断块位于A油田东南部,四周被断层切割成长方形的断块。沉积相主要以三角洲分流平原相和内、外前缘相为主。它于1987年投产,是目前A油田唯一一个采用350m×350m井网开发的区块。由于砂体发育规模小,储层物性差,井距较大,连通性差,水驱控制程度低,开发过程中表现为注水受效差、调整困难。本文针对S断块的含水变化进行分析,通过含水分级对油井进行分类,主要分析油井含水两极分化的原因及潜力。
S fault is located in the southeast of oilfield A, surrounded by fault cut into rectangular blocks. Sedimentary facies mainly deltas the delta plain and the inner and outer front facies. It was put into operation in 1987 and is the only block in the A field that uses a 350m × 350m well pattern. Due to the small scale of sand body development, poor reservoir physical properties, large well spacing, poor connectivity and low degree of water-flooding control, the performance of water injection is poor and the adjustment is difficult in the development process. In this paper, the water cut in S block is analyzed, and the oil well is classified by water cut. The main reason and potential of oil well polarization in oil well are analyzed.