页岩抑制剂PAI的室内评价  

EXPERIMENTAL EVALUATION OF SHALE INHIBITOR PAI

作　　者：张艳娜[1] 张旭龙 

机构地区：[1]中国石油勘探开发研究院 [2]长城钻探工程有限公司

出　　处：《钻采工艺》2017年第3期94-96,116,共4页Drilling & Production Technology

基　　金：国家科技重大专项"窄密度窗口安全钻完井技术及装备"(2011ZX05021-003)

摘　　要：通过调研现有的泥页岩井壁稳定机理,提出了螯合稳定井壁的方法,并在室内合成了页岩稳定剂。通过钻屑回收率、膨润土容量、岩心膨胀率和泥球浸泡实验评价了合成的处理剂稳定膨润土的性能。结果表明,合成的页岩稳定剂与常规的抑制剂相比表现出了钻屑回收率高、膨润土容量大、岩心膨胀率小、泥球膨胀量小等特点。并通过测定膨润土胶体体系的zeta电位和激光粒度分布,间接印证了螯合稳定泥岩井壁的作用机理。On basis of the investigation ofthe existing theory on shale wellbore stability mechanism,the method of stabilizing borehole by chelation was put forward,and the shale-stabilizing agent was synthetized in the lab. Its stabilizing performance in shale was evaluated by experiments regards cuttings 'recovery ratio,clay capacity,core swelling rate and mud ball soaking tests. The results showed that,compared with conventional inhibitors,the synthesized chelating agent had high cuttings' recovery ratio,high clay capacity,and low core swelling rate. The chelation mechanism of wellbore stabilization was indirectly confirmed by zeta potential testand laser particle size distribution test.

关 键 词：螯合作用 井壁稳定 泥页岩 抑制性 

分 类 号：TE254.4[石油与天然气工程—油气井工程]