钻井液与完井液2023，Vol.40Issue(5)：586-593,8.DOI:10.12358/j.issn.1001-5620.2023.05.006
塔里木致密裂缝性储层钻井液侵入实验研究
Experimental Study on Mud Intrusion in Tarim Tightly Fractured Reservoirs
摘要
Abstract
In recent years,the problem of tight sandstone reservoir damage and protection has attracted the attention of scholars.Due to the existence of natural fracture channel communication,the fluids can easily enter the reservoir along the fractures during the development of fractured tight reservoirs and cause serious damage to the reservoir.In order to investigate the degree and mechanism of mud damage to fractured reservoirs,this paper conducts mud intrusion damage experiments with fractured tight sandstone reservoirs in Tarim Kucha Piedmont block as the research object.The experimental results show that the mud intrusion process can be divided into four stages according to the formation process of mud cake,namely,no mud cake stage,mud cake rapid generation stage,mud cake dynamic equilibrium stage and formation of sealing stage;the mud intrusion rate is affected by the reservoir permeability,mud cake permeability,fluid properties and specific gravity,and when the reservoir permeability is higher than the critical permeability,the intrusion rate is mainly determined by the filter cake permeability;by Scanning electron microscope results show that the blockage state of mud solid phase particles in core pore throat is divided into three kinds:blockage,adhesion and filling,and different blockage states have different degrees of damage to reservoir permeability.The mud dynamic damage analysis and solid-phase particle intrusion study obtained in this paper can help improve the complex reservoir simulator,which has certain guiding significance for the field construction operation and mud optimization.关键词
钻井液/致密裂缝储层/侵入速率/固相颗粒/储层保护Key words
Drilling fluid/Tight fracture reservoir/Mud intrusion/Solid particle/Reservoir protection分类
能源科技引用本文复制引用
黎明,郭建春,刘彧轩,刘文辉..塔里木致密裂缝性储层钻井液侵入实验研究[J].钻井液与完井液,2023,40(5):586-593,8.基金项目
国家自然科学基金"深层页岩气压裂多裂缝的竞争起裂及扩展"(51874250). （51874250）
