钻井液与完井液2024，Vol.41Issue(2)：172-177,6.DOI:10.12358/j.issn.1001-5620.2024.02.005
超致密储层流体敏感性实验方法
The Experimental Methods to Evaluate the Fluids Sensitivity Damage of Ultra-deep and Ultra-tight Gas Reservoirs
摘要
Abstract
Ultra-tight gas reservoirs are characteristic with deep buried depth,high formation temperature and strong potential fluids sensitivity damage,and the ultra-low permeability of matrix lead to the industry standard method not being applied to evaluate the formation fluids sensitivity damage.In this study,sandstone cores from ultra-tight gas layers were selected.Meanwhile,modified pressure decay method was proposed.In addition,the normal pressure decay method and modified steady-state fluid sensitivity test method were used to evaluate the water sensitive damage degree as a comparison.The results indicates that the water sensitivity damage degree obtained by the normal pressure decay method is middle to weak,the water sensitivity damage degree obtained by the modified pressure decay method is middle to strong,which is consistent with the modified steady-state fluid sensitivity test method.Moreover,the experiment time was reduced by nearly 40%.The analysis showed that the modified pressure decay method could simulate the stratum high temperature environment with the clear principle and obtained reliable result.The new method makes up for the deficiency that the normal pressure decay method cannot efficiently inject the working fluid into the core,improves the testing accuracy and shorts the experimental time,and has reference significance for the damage evaluation method of ultra-tight oil and gas reservoir.关键词
超致密/砂岩气藏/高温/高回压/流体敏感性/评价方法Key words
Ultra-tight/Sandstone gas reservoirs/High temperature/High backpressure/Fluid sensitivity damage/Evaluation methods分类
能源科技引用本文复制引用
张杜杰,金军斌,李大奇,张栋,金中良..超致密储层流体敏感性实验方法[J].钻井液与完井液,2024,41(2):172-177,6.基金项目
国家自然科学基金联合基金"高温高应力井筒失稳机理与控制方法"(U19B6003-05) （U19B6003-05）
国家重点研发计划"井筒稳定性闭环响应机制与智能调控方法"(2019YFA0708303) （2019YFA0708303）
中国博士后科学基金面上资助"深部破碎地层井壁稳定技术研究"(2020M680818). （2020M680818）
