孤南131低渗透断块油藏改善注水的主要做法及效果

Main Techniques and It, s Effect of Synthe-sizing Reconstruct in Gunan 131 Fault-Block Oilfield

胜利油区孤南 131断块是一个比较典型的低渗透断块油藏 ,自 1989年 1月投入注水开发以来 ,由于注水水质不合格 ,造成该断块注水困难 ,注水井近井地带污染堵塞严重 ,停注井多 ,平面、层间矛盾突出 ,整个断块开发效果变差。在进行充分调研的基础上 ,通过室内实验和矿场试验 ,增加注水精细过滤装置改善了注水水质 ;采用复合解堵、水力割缝等新工艺技术对该断块注水井进行改造 ,使该断块 6口停注井全部恢复注水 ;采用压裂、补孔等措施对油井进行综合治理 ,协调了注采关系 ,完善了注采井网 ,取得了明显的效果 。

Gunan 131 fault block is a relative typical low permeable fault block oilfield. Since Janaury,1986, for the injected water was disqualification,resulted in the block's water wells walling up near the rolls and the wells stopped. The plane and layer problems stand out. As a result of this cease, it lead to the whole exploting effects that becomes badly. At first, the injecting water quality have been improved by adding the equipments which gives the water getting fine in the last year. In the second, the new technology of composite release wall up,water forcing making sews etc. have been used in the water wells reconstructing, 6 wells resumed working. At last, A great many measures of increasing production was been adopted in the oil wells. The connection of the injection and picking was corresponded with, the whole exploiting situation of this block was looked up at all.