钻井液与完井液2012，Vol.29Issue(3)：38-39,43,3.
苏20K-P1储气库井超低压砂岩地层随钻堵漏技术
Technology of Mud Loss Control While Drilling in Ultra-low Pressure Sandstone Formation of Gas Storage Well Su20K-Pl
郝惠军 1田野 1张健庚 1程智 1刘学玲 1刘艳 1张黎黎2
作者信息
- 1. 渤海钻探工程技术研究院,天津
- 2. 华北油田公司采油工艺研究院,河北任丘
- 折叠
摘要
Abstract
The well of Su20K-Pl is a gas storage horizontal well with four intervals in Huabei oilfield, and the target formation
is interbeded of sandstone and mudstone with the formation pressure coefficient is only 0.18. To prevent mudstone sloughing, the designed drilling fluid density is 1.10 g/cm3, so it is very difficult to prevent and control mud loss. In laboratory, based on the geology information, using calculating formula of permeability, the average density of target formation is obtained of 18 μm, and according to the Four Balls Touching theory, the sand bed of 0.125-0.180 mm is chosen to simulate lost circulation. The experimental results show that after contaminated by LCM drilling fluid, the reduced penetration rate of the offset well cores is 76%, and the invasion depth is only 1cm that can be broken down easily. The application of this
technology of mud loss control while drilling is very successful, which the formed plugged zone is tight so as to stop the pressure transmission, however, the ROP must be controlled in reasonable range to make the LCM has enough time to seal
the thief zone.关键词
储气库井/随钻堵漏/临时性封堵/成膜防塌聚合物/砂岩地层Key words
Gas storage well/ Mud loss control while drilling/ Temporary sealing/ Film-forming anti-sloughing polymer/ Sandstone formation分类
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郝惠军,田野,张健庚,程智,刘学玲,刘艳,张黎黎..苏20K-P1储气库井超低压砂岩地层随钻堵漏技术[J].钻井液与完井液,2012,29(3):38-39,43,3.
