一种高性能页岩气水基钻井液体系配方的室内评价
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摘要
在分析钻遇地层岩心黏土矿物种类及含量的基础上,对高性能水基钻井液的添加剂进行了优选,确定了坂土、抑制剂、增黏剂、降滤失剂、润滑剂、封堵剂等组分配方。在室内配制出了一种适用于N-Y地层的高性能水基钻井液体系,并进行了性能评价。评价结果表明:该钻井液体系在流变性能、抑制性能、润滑性能、抗温能力以及抗污染能力方面具有较好的稳定性和应用性;在100℃条件下热滚16 h后,高温高压滤失量仅为5.7 mL,摩阻系数为0.12,具有较好的润滑性和流变性能;温度最高达到120℃时仍具有较好的抗温性能;钻屑滚动回收率为98.76%,有较好的抑制性能;密度可加重到1.7 g/cm~3以上,具有较好的稳定性。
Based on the analysis of the types and contents of core clay minerals in the study area, the addition agents in high performance water-based drilling fluid are optimized and the formula is determined containing bentonite, inhibitor, tackifier, filtrate reducer, lubricant, blocking agent, etc.. A high performance water-based drilling fluid system adapted to the N-Y formation is developed and the performances are evaluated in laboratory. The evaluation results show that the drilling fluid system has good stability and applicability in rheological performance, inhibition performance, lubricity, temperature resistance and anti-pollution ability. The drilling fluid system has good rheological properties and lubricating properties,the high temperature and high pressure filtrate loss is only 5.7 mL and the friction coefficient is 0.12 after aged at 100 ℃ for 16 h. When the temperature reaches 120 ℃, the system still maintains strong temperature resistance. The cutting heat roll recovery reaches 98.76%, and the inhibition performance is good. The density can be increased to more than 1.7 g/cm~3 and the stability is also good.
Based on the analysis of the types and contents of core clay minerals in the study area, the addition agents in high performance water-based drilling fluid are optimized and the formula is determined containing bentonite, inhibitor, tackifier, filtrate reducer, lubricant, blocking agent, etc.. A high performance water-based drilling fluid system adapted to the N-Y formation is developed and the performances are evaluated in laboratory. The evaluation results show that the drilling fluid system has good stability and applicability in rheological performance, inhibition performance, lubricity, temperature resistance and anti-pollution ability. The drilling fluid system has good rheological properties and lubricating properties,the high temperature and high pressure filtrate loss is only 5.7 mL and the friction coefficient is 0.12 after aged at 100 ℃ for 16 h. When the temperature reaches 120 ℃, the system still maintains strong temperature resistance. The cutting heat roll recovery reaches 98.76%, and the inhibition performance is good. The density can be increased to more than 1.7 g/cm~3 and the stability is also good.
引文
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[2] 邱正松,刘扣其,曹杰,等.油基钻井液低温流变特性实验研究[J].钻井液与完井液, 2014, 31(3): 32-34.
[3] 王中华.页岩气水平井钻井液技术的难点及选用原则[J].中外能源,2012(4):43-47.
[4] 周洁.准噶尔盆地南缘和东缘地区上三叠统及沉积特征研究[D].北京:中国地质大学,2015.
[5] 付炜.准噶尔盆地南缘霍玛吐背斜带中上组合沉积相研究[D].武汉:长江大学,2015.
[6] 邱春阳,秦涛,王宝田,等.准噶尔盆地中部4区块侏罗系井壁稳定钻井液技术[J]. 钻采工艺,2015(5):77-80.
[7] 杨云锋,曹光福,申延晴,等.准噶尔盆地超深井钻井液体系的研究与应用[J].长江大学学报(自科版),2016(29):39-42.
[8] 王清顺,汪志明,赵雄虎.氯化钙/聚合物钻井液体系室内研究[J].钻井液与完井液,2003(5):26-28.
[9] 王雷,牟云龙,杨培龙.高密度无黏土相饱和盐水钻井液研究[J].石油天然气学报,2014(11):151-154.
[10] 王富华.抗高温高密度水基钻井液作用机理及性能研究[D].北京:中国石油大学,2009.