孤南油田注采结构调整

孤南油田为复杂断块油藏 ,开发层系以馆陶组和东营组为主 ,非均质性严重。进入高含水期后 ,油水关系更加复杂。为了合理调整注采结构 ,首先研究了微构造和沉积微相特征及其与剩余油分布的关系 ,并在此基础上找到原注采井网存在的问题 ,然后采取针对性的调整措施 ,如 :优选射孔井段、调剖、油井改层等 ,使调整后的注采结构与微构造特征、沉积微相特征及剩余油分布相匹配 ,以此获得了较好的控水稳油效果 ,确保了孤南油田的稳产。

The injection-production scheme adjustment of Gunan oil field.

Gunan oil field is a kind of complex fault block oil reservoir with severe heterogeneity. Ng and Ed is the main strata series of developments. The OWC (oil -water contact) became more complex in the period of high water cut. In order to adjust injection-production structure, the characters of mini-structure, sedimentary microfacies and their relationship with remaining oil distribution were studied first, then the problems resulted from former injection-production patterns were found based on the studies. Lastly, corresponding measures, such as optimizing perforated interval, profile controlling and changing pay beds, were taken. These measures made injection-production structure match the mini-structure, microfacies and the residual oil distribution. Oil production has been stabilized by water control in Gunan oil field.