顺北4XH井抗高温高密度钻井液技术研究及应用  

Research and application of a high-temperature high-density drilling fluid system in Well Shunbei-4XH

作　　者：董晓强 方俊伟[3,4] 李雄[1,2] 张国 张永峰[5] 王从波 DONG Xaoqiang;FANG Junwei;LI Xiog;ZHANG Guo;ZHANG Yongfeng;WANG Congbo(State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,Beijing 102206,China;SINOPEC Research Institute of Petroleum Engineering,Beijing 100101,China;Petroleum Engineering Technology Research Institute of SINOPEC Northwest Oilfield Company,Urumqi 830011,Xinjiang,China;SINOPEC Key Laboratory of Enhanced Oil Recovery for Fractured-Vuggy Reservoirs,Urumqi 832100,Xinjiang,China;Western Company of SINOPEC North China Petroleum Engineering Co,Ltd,Bayingol Mongolian Autonomous Prefecture 841600,Xinjiang,China;Xianyang Sanpu Oilfield Service Company of SINOPEC North China Petroleum Engineering Co,Ltd,Xiarnyang 712000,Shaanxi,China)

机构地区：[1]页岩油气富集机理与有效开发国家重点实验室,北京102206 [2]中国石化石油工程技术研究院 [3]中国石化西北油田分公司石油工程技术研究院 [4]中国石化缝洞型油藏提高采收率重点实验室 [5]中国石化华北石油工程有限公司西部分公司 [6]中国石化华北石油工程公司咸阳三普油田服务有限公司

出　　处：《石油钻采工艺》2022年第2期161-167,共7页Oil Drilling & Production Technology

基　　金：国家重点研发计划“火成岩地区深层地热高效成井关键技术”子课题(编号:2019YFC0604904);国家科技重大专项“彭水地区常压页岩气勘探开发示范工程”(编号:2016ZX05061);中石化科技部项目“顺北一区断溶体油藏储层保护技术研究”(编号:P18021-4)、“PGA可降解材料在钻井液中的应用前瞻研究”。

摘　　要：顺北4XH井是顺北油田Ⅳ号断裂带的一口重点预探井,该井六开奥陶系一间房组及鹰山组地层发育微裂缝和溶孔,为碳酸盐岩裂缝型高压气藏,井底温度超过170℃。为提高钻井液体系高温胶体稳定性、封堵防塌、高温沉降稳定性,同时兼顾储层保护,通过关键处理剂研选,研制出一套耐温200℃、密度2.00~2.25 g/cm~3的水基钻井液体系,180℃滤失量9.2 mL,200℃、7 d沉降稳定系数0.513。钻井液振荡流变、动态光散射实验及现场应用表明,体系具有良好流动和润滑性能、高温沉降稳定性,高温高压滤失量≤10 mL,实现对储层微裂缝实时封堵,取得了良好的屏蔽暂堵效果。Well Shunbei-4 XH is a key preliminary prospecting well for the No.Ⅳ fault zone of the Shunbei oilfield.The Ordovician Yijianfang formation and Yingshan formation of the production casing section of this well are well-developed with micro fractures and karst vugs and represent fracture-type carbonate gas reservoir with the formation temperature exceeding 170 ℃.To enhance the gel thermal stability,plugging and anti-collapse performance,and high-temperature settlement stability of the drilling fluid system and also avoid reservoir damage,the water-based drilling fluid system with thermal resistance to 200 ℃ and density of2.00-2.25 g/cm~3 was developed via development and optimization of key additives.The filter loss at 180 ℃ is 9.2 mL and the 7-day settlement stability coefficient at 200 ℃ is 0.513.The test results of the oscillatory rheometer and dynamic light scattering as well as the field application demonstrate that the presented system has premium flow and lubricating performance,favorable high-temperature settlement stability,and low filter loss at high temperature and high pressure(≤10 mL).It can immediately plug micro fractures of the reservoir to deliver desired temporary plugging.

关 键 词：水基钻井液 高温 高密度 沉降稳定性 顺北4XH井 

分 类 号：TE254[石油与天然气工程—油气井工程]