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自80年代初开始,中国油田开发进入了一个新时期。已经开发的老油田,经过六七十年代的高速发展,暴露出原来开发层系划分较粗和井网部署较稀的不适应性。一些投产较早的油田大都进入高含水阶段,比如1980年陆上油田综合含水率为55.3%,到了2010年已超过88%。如何控制含水上升速度,提高注水采收率,成为突出的课题。针对这些问题,我们多次对注水井进行了调剖以达到地下液流转向、并同时采取周期注水、精细层间调水、加密井网部署等等,通过全面调整,改善了老区油藏开发效果。
Since the early 1980s, China’s oilfield development has entered a new era. The old oilfields that have been developed, after the rapid development in the 1960s and 1970s, revealed the incompatibility of the formerly developed stratigraphic systems and the relatively thin wellbore deployment. Some of the oilfields put into operation earlier entered the high water cut stage. For example, in 1980, the integrated water cut of onshore oilfields was 55.3%, and by 2010 it exceeded 88%. How to control the rising rate of water cut and improve the water injection recovery rate has become a prominent issue. In response to these problems, we have repeatedly profiled the injection wells to achieve underground flow diversion, and at the same time, we adopted periodic water injection, fine-level water transfer, and the deployment of weathered well patterns. Through comprehensive adjustments, we improved the reservoir development in old areas effect.