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酒东区块定向井托压问题原因分析及解决措施

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摘要 酒东区块位于酒泉盆地酒东坳陷营尔凹陷长沙岭构造,隶属于中石油玉门油田。2006年开发至今,已承钻了200余口井,其中绝大部分为直井,从2012年开钻的第一口定向井长17井之后,截止目前已承钻了5口定向井,由于该区块油层位置均在4000m以上的下沟组井段,所以造斜点都定在3000~3450m段的第三系地层,该井段夹层多、岩性以及地层倾角变化大,所以在定向过程中出现了严重的托压现象。为了确保施工顺利,减少事故复杂,缩短钻进周期,必须根据目前所承钻定向井出现的情况进行系统分析,除开对钻井液的润滑防卡、井壁稳定等要求更加严格以外,对定向过程中托压问题的解决也是我们目前施工中存在且迫切要求解决的一个重要问题。
出处 《西部探矿工程》 CAS 2017年第9期111-112,116,共3页 West-China Exploration Engineering
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