摘要
钻井液中黏土矿物水化细分散是导致钻井液低密度劣质固相含量增加的主要原因,为有效控制钻井液中低密度劣质固相含量增加,基于对低密度劣质固相产生及其控制原理研究,从黏土矿物粒径分布、晶层间距变化、红外光谱分析、对钻井液性能影响等四个方面开展了低分子胺类处理剂CQ-ATP对黏土水化细分散的影响分析。结果表明,CQ-ATP可进入黏土矿物晶层结构,保持黏土矿物干/湿样晶层间距数值相当,强化黏土矿物晶层结构连接,从而有效控制黏土水化细分散。现场应用证实,在钻井液中添加CQ-ATP后,钻进过程中振动筛返出岩屑颗粒尺寸大于1.7 mm占比70%以上,返出岩屑颗粒成型度好、尺寸大、PDC齿痕清晰可见,相较于钻井液中未添加CQ-ATP的邻井,应用井钻井液性能稳定、可控,完钻时钻井液低密度劣质固相含量可控制在6%左右。
The increase of low-density and low-quality solid phase content is mainly caused by hydration and fine dispersion of clay minerals in drilling fluid.In order to control the increase,based on the analysis of its generation and control principles,the influence of low-molecular-weight amine treatment agent CQ-ATP on clay hydration and fine dispersion was analyzed from four aspects:particle size distribution,changes in crystal layer spacing,infrared spectrum analysis,and impact on drilling fluid performance.The results indicate that CQ-ATP can control the hydration and fine dispersion by entering the crystal layer structure,keeping the crystal layer spacing of clay dry/wet samples close,and strengthening the crystal layer structure connection of clay minerals.Field application shows that through CQ-ATP strengthening the crystal layer structure connection,more than 70%of the returned debris particles from the shale shaker are larger than 1.7mm.The returned rock debris particles have good formability,large size,and the PDC tooth marks are clearly visible.Compared with adjacent wells,the performance of the drilling fluid of the applied well is stable and controllable,and the low-density and low-quality solid phase content is controlled at about 6%at the end of drilling.
作者
舒小波
陈俊斌
欧翔
SHU Xiaobo;CHEN Junbin;OU Xiang(Drilling&Production Engineering Technology Research Institute of Chuanqing Drilling Engineering Co.,Ltd.,PetroChina,Guanghan 618300,Shaanxi,China;Oil&Gas Field Applied Chemistry Key Laboratory of Sichuan Province,Guanghan 618300,Sichuan,China)
出处
《石油地质与工程》
CAS
2023年第5期90-93,99,共5页
Petroleum Geology and Engineering
基金
国家科技重大专项课题“工厂化钻井关键技术研究及应用”(2016ZX05022-001)
中国石油科学研究与技术开发项目“页岩气长水平段水基钻井液现场试验”(2018F-21)
川庆科研项目“川渝强水敏性泥岩水化控制技术研究与试验”(CQ2020B-13-1-3)。
关键词
黏土矿物
水化细分散
劣质固相控制
钻井液
clay minerals
hydration and fine dispersion
low-quality solid phase control
drilling fluid
