吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (4): 1093-1099.doi: 10.13278/j.cnki.jjuese.20180015
王福平1, 李刚1, 高元宏2,3, 段隆臣4, 刘海声2,3
Wang Fuping1, Li Gang1, Gao Yuanhong2,3, Duan Longchen4, Liu Haisheng2,3
摘要: 为解决火山碎屑岩在钻进中易剥落、易崩塌的问题,探讨钻井液性能对火山碎屑岩崩解性的影响,以青海阿克楚克塞矿区火山碎屑岩为例,分析了其岩石样品的矿物成分,进行了岩石样品烘干和浸水循环实验,采用多元线性回归分析法分析了原1#、2#钻井液的主要参数和耐崩解性指数之间的关系。结果表明,钻井液的动塑比、静切力、失水量和漏斗黏度4项性能指标与火山碎屑岩崩解性的相关性可达83.37%,其中动塑比对火山碎屑岩崩解性的影响尤为显著。通过调整水解聚丙烯酰胺和褐煤树脂质量分数提高了钻井液的动塑比和稳定性,从而获得优选钻井液配方:水+4%膨润土+3% Na2CO3+0.1% NaOH+0.15% MV-CMC(中黏钠羧甲基纤维素)+0.5% LV-CMC(低黏钠羧甲基纤维素)+2% SPNH(褐煤树脂)+0.08% PHP(水解聚丙烯酰胺)。现场应用表明,钻进至429.00 m深度时使用优选钻井液孔底沉渣厚度较1#钻井液降低了89.7%,较2#钻井液降低了80.3%。
中图分类号:
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