摘要
准噶尔南缘安集海河组地层压力系数高,伊/蒙黏土含量高。钻井过程中普遍存在钻头泥包、井壁垮塌、钻井液的膨润土含量值增长快、性能稳定周期短等技术难题,常规井用的高性能钻井液不能满足该地层安全钻井的需要。开展了南缘山前构造井的强抑制高性能水基钻井液研究,评价了胺基抑制剂SIAT、胺基硅醇HAS和键合剂HBA三者的协同抑制性能和两种微纳米封堵剂的封堵性能。通过正交实验,形成了一套强抑制高性能水基钻井液体系,对体系的抑制性、抗污染能力和抗温性能进行了评价。现场应用表明,强抑制高性能水基钻井液性能稳定,钻井过程中无钻头泥包现象,钻屑代表性好,井壁稳定,电测和下套管作业安全。
The Anjihaihe formation in the south brink of the Dzungars Basin has high formation pressures and high I/S clay content, resulting in bit balling, borehole wall collapse and fast increasing of clay content in drilling fluid, and the properties of the drilling fluid can maintain stable only for a short time. High performance drilling fluids previously used are not be able to satisfy the needs of safe drilling. Laboratory study was conducted on the high-performance inhibitive drilling fluid technology suitable for drilling in the south brink of Dzungars Basin. The synergy of three drilling fluid additives, an amine based inhibitive agent SIAT, an amine based silanol HAS and a bonding agent HBA, and the plugging performance of two nanophase plugging agents were evaluated. A high-performance inhibitive water base drilling fluid was formulated using these additives, and the inhibitive capacity, resistance to contamination and high temperature tolerance were evaluated. Field application of the drilling fluid showed that the properties of the drilling fluid was stable, no bit balling has ever been found during drilling. Drilled cuttings maintained their shapes on shake screens and borehole wall was stabilized throughout the whole drilling process. Wireline logging and casing operation were all conducted smoothly.
作者
舒义勇
孙俊
陈俊斌
祝学飞
查凌飞
SHU Yiyong;SUN Jun;CHEN Junbin;ZHU Xuefei;ZHA Lingfei(Xinjiang Branch of CCDC, Korla, Xinjiang 841000;Drilling & Production Technology Research Institute of CCDC, Guanghan, Sichuan 618300)
出处
《钻井液与完井液》
CAS
北大核心
2019年第1期41-45,50,共6页
Drilling Fluid & Completion Fluid
关键词
高性能
强抑制
安集海河组
水基钻井液
High performance
Strongly inhibitive
Anjihaihe formation
Water base drilling fluid
