深层致密气藏钻井液技术难点及对策  

Difficulties and Countermeasures of Drilling Fluid Technology Used for Deep and Tight Gas Reservoirs

作　　者：任文希[1] 李皋[1] 孟英峰[1] 郭倡俊 汪传磊 

机构地区：[1]油气藏地质及开发工程国家重点实验室(西南石油大学),四川成都610500 [2]延长油田公司定边采油厂,陕西榆林7190000 [3]中石油西南油气田分公司采气工程研究院,四川德阳618300

出　　处：《石油天然气学报》2014年第8期103-106,7,共4页Journal of Oil and Gas Technology

基　　金：国家自然科学基金项目(51134004);国家科技重大专项(2011ZX05022-005)

摘　　要：深层致密气藏具有埋藏深、温度高、低孔低渗、微裂缝发育、非均质性强等特点,钻井作业过程中极易遭受储层损害;此外深井水平井作业过程中,摩阻、扭矩较大,易发生托压、钻具阻卡等复杂情况。为解决这一系列技术难题,选择了低密度抗高温水包油钻井液。现场应用表明,该钻井液体系流变性稳定,环空压耗低,润滑性好,且具有良好的储层保护效果。加之其低毒性、对环境友好的特点,具有一定的推广和应用前景。Deep and tight gas reservoir was buried deeply,it was vulnerable to be damaged in drilling due to the characteristics of high temperature,low porosity,low permeability,strong heterogeneity and micro-fracture development.Moreover,during horizontal well drilling,because of friction and bigger torque,back pressure and drill-pipe sticking were easily induced.To solve these problems,a low density and high temperature resistance oil-in-water drilling fluid was chosen for horizontal well drilling.Field application shows that the drilling fluid has stable rheological property with low annulus pressure loss and excellent lubricity and well formation protection effect.In addition,the drilling fluid has low toxicity,it has good prospects for popularization and application.

关 键 词：深层致密气藏 水包油钻井液 水平井 储层保护 

分 类 号：TE254[石油与天然气工程—油气井工程]