由于水平井钻井技术具有井眼穿过油层的长度长,油井的单井产量高;可使一大批用直井或普通定向井无开采价值的油藏具有工业开采价值等特点,因此水平井的数量在各大油田日益增多。但随着时间的推移,这些早期开发的水平井已不能正常生产,其中最主要的原因就是油井严重出砂而导致产量降低或停产。因此,必须采取措施清除积砂,通常采取水力冲砂和机械冲砂的综合措施。 Because horizontal well drilling technology has the advantages of long wellbore length passing through the oil layer and high output of single well in oil well, it can make a large number of reservoirs with no exploitation value in vertical wells or ordinary directional wells have the characteristics of industrial exploitation and so on. Therefore, the number of horizontal wells In the major oil fields growing. However, as time goes on, these early developed horizontal wells can no longer be produced normally. The most important reason for this is that severe sand production in the well leads to a decrease in production or shutdown. Therefore, measures must be taken to remove litter, usually using a combination of hydraulic and mechanical sandblasting.