硬岩破碎地层高温钻孔钻进钻井液实验研究.pdf

第43 卷 第4 期 煤田地质与勘探 Vol. 43 No.4 2015 年8 月 COAL GEOLOGY EXPLORATION Aug. 2015 文章编号: 1001-1986(2015)04-0117-03 硬岩破碎地层高温钻孔钻进的钻井液实验研究 邓利蓉，刘振兴，曹 钧，尹晓利 (西北核技术研究所，陕西 西安 710024) : 针对塔里木盆地某矿区地层倾角大、硬度高、极其破碎，定向钻进钻遇地层含高放射性矿物且 温度高，易发生卡埋钻事故及钻孔内高放射性矿物污染钻场环境等问题，选用抗高温具有良好流变力 学性能的护孔配浆材料，采用正交实验设计方法，实验研究钻井液配方。优选出耐温达到 100℃的不 分散低固相聚合物钻井液体系MV-CMC–80A51–NPAN 泥浆。该泥浆性能稳定，具有耐温高、失水量 低、泥皮簿而致密、剪切稀释性能好、成本低的特点，可使硬岩破碎复杂地层的定向钻进顺利中靶。 ：硬岩；破碎；复杂地层；钻井液 ：P634 ：A DOI: 10.3969/j.issn.1001-1986.2015.04.026 Experiment of drilling fluid used to drill hard fractured complex formation DENG Lirong, LIU Zhenxing, CAO Jun, YIN Xiaoli (Northwest Institute of Nuclear Technology, Xi ′an 710024, China) Abstract: Aiming at the formation characteristics and directional drilling difficulties in a mining area of Tarim ba- sin, we have selected high temperature-resistant mixing materials with good rheological and mechanical properties to conduct experimental study on drilling fluid formulation by orthogonal experimental design method. The drilling mud system MV-CMC–80A51–NPAN with heat resistance of 100 ℃ and non-dispersed low solid polymer has been optimized. This mud has stable performance. Moreover, the mud has a high temperature resistance, low fluid loss, thin and dense mud skin, good shear dilution performance and low cost. It plays an important role for smooth di- rectional drilling in hard fractured complex rocks to reach the target. Key words: hard rock; fractured; complex formation; drilling fluid (35°~65°) 1 原钻井液概况及存在的问题 ( 10 ) (800 m PHP-CMC 80℃) PHP-CMC-PW PHP-CMC