“2+3”提高采收率技术在濮城油田的应用研究

The Study of "2+3" Technology Improving Recovery Factor and Its Application in Pucheng Oilfield

针对濮城油田已进入高含水开发后期 ,油藏产油量递减加大 ,开发效果变差的问题 ,认为高含水油田开发后期必须实施注水井调剖与驱油相结合 ,即“2 + 3”技术 .介绍了“2 + 3”提高采收率技术原理以及应用条件 ,“2 + 3”技术在濮城油田的应用情况 ,并指出了该油田应用“2 + 3”

The development of Pucheng oilfield has got into the stage of high water cut, and the oil output decreases greatly. So the measures must be taken in order to improve recovery factor. '2+3' tec-hnology is a measures suitable to the stage of high water cut. It is the combination of the profile control of water injection wells with chemical oil displacement. The stimulation mechanism and the application conditions of '2+3' technology were discussed. The pilot tests in the oilfield increased the oil output by 16.6t/d, and all the four tested oil wells produced result. At last, the favorable and unfavorable factors were pointed out in the application of the technology to Pucheng oilfield.