泥页岩强抑制剂支化聚醚胺PEA-1的特性及在卫456井的应用  

Application of branched polyether amine PEA-1 for drilling fluid in well Wei 456

作　　者：王忠瑾[1,2] 司西强[1,2] 陆为纲 王延世 张永涛[3] 雷祖猛[1,2] WANG Zhongjin;SI Xiqiang;LU Weigang;WANG Yanshi;ZHANG Yongtao;LEI Zumeng(Research Institute of Drilling Engineering Technology of Zhongyuan Petroleum Engineering Co.,Ltd.,SINOPEC,Puyang 457001,China;Drilling and Completion Fluid Technology Center of Petroleum Engineering,SINOPEC,Puyang 457001,China;No.2 Drilling Company of Zhongyuan Petroleum Engineering Co.,Ltd.,SINOPEC,Puyang 457001,China)

机构地区：[1]中国石化中原石油工程有限公司钻井工程技术研究院,河南濮阳457001 [2]中国石化石油工程完钻井液技术中心,河南濮阳457001 [3]中国石化中原石油工程有限公司钻井二公司,河南濮阳457001

出　　处：《精细石油化工进展》2021年第3期10-14,共5页Advances in Fine Petrochemicals

基　　金：中石化中原石油工程公司项目“钻井液用支化聚醚胺的推广应用”(2018207T);中石化石油工程公司项目“基于分子尺寸控制的系列聚胺抑制剂研制与应用”(SG18-19K)。

摘　　要：针对中原区块膏泥岩地层井壁失稳问题,自主研发泥页岩强抑制剂支化聚醚胺PEA-1产品,对PEA-1产品的配伍性能、抑制性能、抗温性能及生物毒性进行了评价,结果表明:PEA-1产品与饱和盐水钻井液配伍性好,相对抑制率大于98%,EC_(50)值为521400 mg/L,远大于排放标准30000mg/L。PEA-1产品在卫456井进行了现场应用,结果表明:PEA-1产品加入现场饱和盐水钻井液后,显著提高了钻井液的抑制防塌性能,有效解决了泥岩、膏泥岩的井壁失稳难题,可实现现场绿色、安全、高效钻进,为该产品在强水敏性泥岩、泥页岩、膏泥岩等易坍塌地层的现场应用提供了较好的技术指导。Aiming at the wellbore instability problem of gypsum shale formation in Zhongyuan block,we independendy developed a strong shale inhibitor branched polyether amine PEA-1 product.In order to determine the characteristics of PEA-1 product,the compatibility,inhibition,temperature resistance and biological toxicity of PEA-1 product were evaluated.The results showed that PEA-1 product had good compatibility with saturated brine drilling fluid,the relative inhibition rate was more than 98%,and the EC_(50) value was 521 400 mg/L,which was far greater than the emission standard of 30 000 mg/L. PEA-1 product had been applied in well Wei456. The test results showed that PEA-1 product could significandy improve the inhibition and anti sloughing ability of drilling fluid by adding saturated brine drilling fluid,and effectively solve the wellbore instability problem of mudstone and gypsum mudstone.PEA-1 can be used to achieve green,safe and efficient drilling,which provides a good technical guidance for the field application of PEA-1 in collapsible formations such as strong water sensitive mudstone,shale and gypsum mudstone and other collapsible formations.

关 键 词：支化聚醚胺 钻井液 泥页岩抑制剂 井壁失稳 

分 类 号：TE254[石油与天然气工程—油气井工程]