钻井液与完井液2025，Vol.42Issue(1)：134-142,9.DOI:10.12358/j.issn.1001-5620.2025.01.015
一种单步解除有机沉积及无机垢的单相酸体系
A Single Phase Acid for One Step Removal of Organic Deposition and Inorganic Scale
摘要
Abstract
The deposition of organic and inorganic scales in the near wellbore zone seriously affects the normal production of oil and gas.Conventional blockage removal systems cannot simultaneously remove organic,inorganic,and their mixed scales.A new multifunctional unblocking system,single phase acid,has been developed to solve the above issues.The system consists of two immiscible liquids(aromatic solvent for organic scale and acid solution for inorganic scale),surfactants,cosurfactants,and functional additives.The performance of single phase acid system was systematically analyzed and evaluated using experimental instruments such as rotary rock disk analyzer,conductivity meter,particle size analyzer,interfacial tension meter,wetting angle tester,friction meter,core flow meter,CT scanning,etc.The experimental results show that the single phase acid is a nano homogeneous dispersion system with an external phase of oil and an internal phase of acid,with a particle size distribution of 7-50 nm;The interfacial tension is 0;It has the performance of relieving reservoir emulsification(demulsification rate greater than 90%),water locking,and wetting modification(oil wet modification to water wet);it can simultaneously dissolve organic scale,inorganic scale,and their mixed scale(dissolution rate 100%);low friction resistance(lower resistance rate greater than 80%),and can achieve large injection rate operations;It has high retarded rate(retarded rate greater than 99%)and can achieve deep depth of reservoirs.Single phase acid utilizes the principle of mutual solubility between oil and acid to achieve the simultaneous dissolution of organic scale,inorganic scale,and their mixed scale in a one step.It is of great significance for the efficient removal of mixed scale pollutants in the near-well area of oil and gas Wells and transfer Wells.Single phase acid system has been carried out field test in Missan Oilfield in Iraq,and get good stimulation result.关键词
单相酸/有机沉积/无机垢/纳米分散体系/单步Key words
Single phase acid/Organic deposition/Inorganic scale/Nanodispersion system/One step分类
能源科技引用本文复制引用
崔波,荣新明,冯浦涌,姚二冬,周福建,王顺..一种单步解除有机沉积及无机垢的单相酸体系[J].钻井液与完井液,2025,42(1):134-142,9.基金项目
国家科技重大专项"中亚和中东地区复杂碳酸盐岩油气藏采油采气关键技术研究与应用"(2017ZX05030005) （2017ZX05030005）
国家重大科技专项"超深裂缝性气藏井筒失稳机理及转向工艺优化研究"(2016ZX05051003). （2016ZX05051003）
