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油井出砂是稠油开采中普遍存在的主要问题。出砂严重者将造成采油通道堵塞、卡泵等事故,严重影响油井寿命和原油产量。先期防砂完井技术能克服以上缺陷。本文着重介绍该技术下的井身结构设计与钻井程序、砾石和筛管的选择、钻井液和携砂液、预应力完井技术、定向井防砂技术、现场应用等6个方面。这种先期防砂井具有油井完善系数高、产量高及防砂效果好等特点。通过在辽河油田的高升、曙光和欢喜岭等主要稠油区300多口井的现场应用,效果突出。应用结果表明,严重出砂的稠油井,先期防砂完井工艺是一种比较理想的完井方法。
Sand production in oil wells is a common problem in heavy oil production. Severe sand production will lead to blockage of oil production channels, pump and other accidents, a serious impact on well life and crude oil production. Pre-sand control technology can overcome the above defects. This article focuses on six aspects of the wellbore structure design and drilling program, gravel and screen selection, drilling fluid and sand carrying fluid, prestressed completion technology, directional well sand control technology and field application. This kind of advanced sand control well has the characteristics of high oil well perfect coefficient, high output and good sand control effect. Through the Liaohe Oilfield rising, dawn and Huanxiling major heavy oil areas such as more than 300 wells on-site application, the effect is outstanding. The application results show that the heavy sand wells with severe sand production and the pre-sand control well completions are an ideal completion method.