南堡2、3号构造带保护储层的钻井液体系  

Drilling Fluid System of the Protection Reservoir of Nanpu Tectonic Zone No. 2 and No. 3

作　　者：陈永斌 万里平[1] 朱宽亮[2] 李皋[1] CHEN Yong-bin;WAN Li-ping;ZHU Kuan-liang;LI Gao(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;Jidong Oilfield Company of PetroChina,Tangshan 063299,China)

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500 [2]中国石油天然气股份有限公司冀东油田分公司,唐山063299

出　　处：《科学技术与工程》2019年第16期101-105,共5页Science Technology and Engineering

基　　金：国家油气重大专项(2016ZX05021-004-005);国家自然科学基金(51674217)资助

摘　　要：现有钻井液对南堡2、3号构造第三系储层损害主要为液相损害并且其封堵效果不佳,为了降低损害程度提高封堵效果,对研究区块的储层岩性、物性、敏感性和潜在损害因素等进行分析。利用FDY—Ⅱ型储层综合损害实验评价系统和钻井液高温高压封堵评价等方法进行钻井液优化设计。结果表明,优选后的钻井液体系表面张力由30.61mN·m^-1降至27.51mN·m^-1,防水锁能力提高;高温高压滤失量由22.7mL降至14.2mL,滤失量低且封堵效果明显;岩心渗透率恢复值由70%以下提高到85%以上。研究成果为南堡2、3号构造带致密油气藏勘探开发提供保护储层的钻井液体系备选方案。The existing drilling fluid damage to the tertiary reservoirs of No.2 and No.3 structures in Nanpu is mainly liquid phase damage and its blocking effect is not good.In order to reduce the degree of damage and improve the sealing effect,the reservoir lithology,physical properties,sensitivity and potential damage factors of the study block were analyzed.FDY-II reservoir comprehensive damage experimental evaluation system and drilling fluid high temperature and high pressure plugging evaluation were utilized to optimize the drilling fluid optimization.The results show that the surface tension of the optimized drilling fluid system is reduced from 30.61 mN·m^-1 to 27.51 mN·m^-1,and the waterproof lock capacity is improved.The high temperature and high pressure fluid loss is reduced from 22.7 mL to 14.2 mL,and the fluid loss is low.The plugging effect is obvious.The core permeability recovery value is increased from below 70% to over 85%.The research results provide an alternative to the drilling fluid system for the protection of reservoirs in the exploration and development of tight reservoirs in Nanpu No.2 and No.3 structural belts.

关 键 词：低渗储层 储层损害 钻井液 渗透率 

分 类 号：TE258[石油与天然气工程—油气井工程]