煤层气水平井弱凝胶钻井液体系的应用研究
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摘要
为解决晋城潘庄区块15号煤层水平井不易成孔、井壁易坍塌等施工难题,采用煤层气井井下观测、钻井液材料优选实验、钻井液体系室内评价实验等研究方法,对煤层气水平井弱凝胶钻井液体系进行了优化研究,并在SHH02-4水平井进行了现场应用试验,结果表明:采用弱凝胶钻井液体系能保证安全钻进,且残渣易降解、污染小,相对于周边L形井钻井周期缩短了6%,水平段钻井长度增加了190 m,该井在排采初期日产煤层气1 320 m~3,有望实现高产,说明弱凝胶钻井液体系在煤层气水平井中具有良好的适用性。
The 15#coal seam horizontal well in Jincheng Pangzhuang Block is difficult to form holes and shaft walls are liable to collapse,in order to solve these difficulties,research methods such as downhole observation of CBM well,optimization experiment of drilling fluid material and indoor evaluation experiment of drilling fluid system were adopted to optimize the weak gel drilling fluid system of horizontal CBM well,and the field application test was carried out in SHH02-4 horizontal well. The results show that weak gel drilling fluid system can ensure safe drilling,the residue is easy to degrade and has little pollution,the drilling cycle is 6% shorter than that of surrounding L-shaped wells,the horizontal drilling length is increased by 190 m,the well produced 1 320 m~3 of CBM per day at the initial stage of drainage and production,it will be expected to achieve high production. The results show that weak gel drilling fluid system has good applicability in CBM horizontal wells.
The 15#coal seam horizontal well in Jincheng Pangzhuang Block is difficult to form holes and shaft walls are liable to collapse,in order to solve these difficulties,research methods such as downhole observation of CBM well,optimization experiment of drilling fluid material and indoor evaluation experiment of drilling fluid system were adopted to optimize the weak gel drilling fluid system of horizontal CBM well,and the field application test was carried out in SHH02-4 horizontal well. The results show that weak gel drilling fluid system can ensure safe drilling,the residue is easy to degrade and has little pollution,the drilling cycle is 6% shorter than that of surrounding L-shaped wells,the horizontal drilling length is increased by 190 m,the well produced 1 320 m~3 of CBM per day at the initial stage of drainage and production,it will be expected to achieve high production. The results show that weak gel drilling fluid system has good applicability in CBM horizontal wells.
引文
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[14]彭双磊,冯雪钢,田剑,等.国内钻井液增粘剂的研究与应用进展[J].广州化工,2012,40(12):10-11.
[15]程明.钻井液增粘剂的合成及性能评价[J].中国石油和化工标准与质量,2012,32(3):27.
[2]王益山,王合林,刘大伟,等.中国煤层气钻井技术现状及发展趋势[J].天然气工业,2014,34(8):87-91.
[3]张海涛,郭英海,王燕.晋城柿庄地区煤层气地面钻井泥浆护壁工艺技术研究[J].矿业安全与环保,2012,39(4):14-17.
[4]蔡记华,刘浩,陈宇,等.煤层气水平井可降解钻井液体系研究[J].煤炭学报,2011,36(10):1683-1688.
[5]杨恒林,汪伟英,田中兰.煤层气储层损害机理及应对措施[J].煤炭学报,2014,39(增刊1):158-163.
[6]岳前升,邹来方,蒋光忠,等.煤层气水平井钻井过程储层损害机理[J].煤炭学报,2012,37(1):91-95.
[7]王道宽,彭斌,乌效鸣,等.煤层气弱凝胶和微固相双效钻井液体系[J].钻井液与完井液,2017,34(6):35-40.
[8]吴跃钢,徐菁.无固相弱凝胶钻井液在水井施工中的应用[J].探矿工程(岩土钻掘工程),2016,43(10):261-264.
[9]邱光林,王彦凯,崔永红,等.晋城新区煤与瓦斯共采技术探讨[J].矿业安全与环保,2001,28(增刊1):79-81.
[10]张政,秦勇,傅雪海,等.潘庄区块煤层含气性分布规律及地质控制因素分析[J].煤炭科学技术,2014,42(5):98-102.
[11]吕帅锋,王生维,张晓飞,等.煤层气钻井固相物污染特征及评价[J].煤田地质与勘探,2017,45(1):162-167.
[12]陈军,马玄,岳前升,等.沁水盆地清水钻井液对煤储层损害机理[J].煤矿安全,2014,45(11):68-71.
[13]岳前升,陈军,邹来方,等.沁水盆地基于储层保护的煤层气水平井钻井液的研究[J].煤炭学报,2012(增刊2):416-419.
[14]彭双磊,冯雪钢,田剑,等.国内钻井液增粘剂的研究与应用进展[J].广州化工,2012,40(12):10-11.
[15]程明.钻井液增粘剂的合成及性能评价[J].中国石油和化工标准与质量,2012,32(3):27.
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