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为评价小眼井的规模经济效益,1998年在朝阳沟薄荷台油田进行42口φ178mm小眼井的区域推广性试验,该油田上部地层胶结疏松,下部青一段至泉四段地层微裂缝发育,易发生井塌、井漏。对原来小眼井钻井液进行了改进,经36口小眼井使用表明,改进后的小眼井钻井液封堵性及润滑性能好,防卡、防塌能力强,解决了该油田井漏、井塌的问题,与小眼井钻井工艺配合,提高了机械钻速,缩短了钻井周期,使小眼井钻井综合成本降低了11.7％。
In order to evaluate the economic benefits of small-eye wells, a pilot study of 42 φ178mm small-hole wells was conducted in the Mentaigou Meitai Oilfield in 1998. The upper strata of the oilfield are loosely cemented and microcracks develop in the lower section of the Qingqing section, Easy collapse occurs, well leakage. The original small hole drilling fluid has been improved, the use of 36 small wells shows that the improved small hole drilling fluid sealing and lubrication performance, anti-card, anti-collapse ability to solve the oil well leakage , The problem of collapsing well, cooperating with the small-hole well drilling technology, improving the ROP, shortening the drilling cycle and reducing the comprehensive cost of the small-hole drilling by 11.7%.