油井选择性堵水

Selective water shutoff for oil well

为控制水从油层产出,建立找水堵水法和不找水堵水法。由于不需找水并能从油层深部控制水的产出,所以不找水堵水法更为重要。不找水堵水法使用选择性堵剂和堵剂选择性注入工艺,达到油井选择性堵水的目的。介绍了选择性堵剂的类型和作用机制,分析堵剂选择性注入工艺中如何利用出水层的特征(高渗透、低流动阻力、高含水饱和度和易于泄压),将堵剂选择性地注入出水层,给出一些油井选择性堵水成功的矿场试验实例。不找水堵水法的应用和发展有广阔的前景。

For controlling water production from oil-bearing formation, water shutoff methods with and without water detection were developed. Because water detection doesn＇t need to be done and water production can be controlled in deep oil bearing formation, the latter method was more important and was reviewed here. In order to select water shutoff for oil well, the selective plugging agents and selective injection technologies were applied. The selective plugging agents and their action mechanisms were introduced, and how to utilize the characteristics of water production formation （ high permeability, low flow resistance, high water saturation and easy to release pressure） and inject the plugging agent selectively into formation was analyzed. Some successful selective water shutoff pilot tests were given. This illustrates that water shutoff without water detection has a wide prospect of application and development.