利用拟水平井改善水驱开发效果

Improving the Effect of Waterflooding by Using Pseudo-horizontal Well

提出了拟水平井的概念。研究认为在水驱开发过程中基于大孔道可以形成拟水平井,而形成拟水平井的主要方法就是侧钻、优势通道上生产井关井或转注。采用流线数值模拟技术研究了拟水平井改善水驱开发效果的可行性,并与调剖堵水技术进行了效果对比。与传统的调剖堵水相比,拟水平井可以取得相对高的提高采收率水平和较好的经济效益。

The concept of pseudo-horizontal wells is proposed. Study indicates that the pseudo-horizontal wells are created based on big pores during oilfield development. The main methods for drilling the horizontal wells is sidetracking, production wells shutdown in optimal paths or inverted injection. A technique of streamline numerical simulation is deployed to study the feasibility of improving the effect of waterflooding in the pseudo-horizontal wells, the result is correlated with those of profile control and water plugging. And it is compared with those of traditional profile control and water plugging, higher efficiency can be obtained for an enhanced recovery and better economic profit is achieved.