钻井液与完井液2025，Vol.42Issue(4)：494-502,9.DOI:10.12358/j.issn.1001-5620.2025.04.008
深部地层CO2对抗高温降滤失剂性能弱化规律及机理分析
Performance Deterioration of High Temperature Filtration Control Agents by CO2 in Deep Formations and Mechanism Analysis Thereof
张坤 1李阳 2穆剑雷 1李永龙 1石亚华 1蒲磊 3谢凌志3
作者信息
- 1. 中国石油集团渤海钻探工程有限公司,天津 300280
- 2. 中国石油物资采购中心,北京 100029
- 3. 长江大学石油工程学院,武汉 430000
- 折叠
摘要
Abstract
In developing deep acidic gas reservoirs,CO2 invasion and contamination cause the properties of high density drilling fluids,especially their ability to control filtration rate,to remarkably deteriorate at elevated temperatures.A new method has been developed to evaluate the contamination of a drilling fluid by CO2 in laboratory,and several typical high temperature filtration control agents were evaluated at 150℃for their ability to resist CO2 contamination.Based on the macro and micro analyses of the performance of a"filtration control agent+bentonite slurry"system,the mechanisms with which CO2 causes the performance of a filtration control agent to deteriorate were systematically studied.The results of the study show that after being contaminated by CO2,the water solubility of the sulfonate type filtration control agents SAS and SMP-III was reduced,resulting in low viscosity,poor filtration property and reduced colloidal stability of the system.Acrylonitrile filtration control agent NH4-HPAN and cellulose filtration control agent PAC-LV,on the other hand,cause the system to viscosify after being contaminated by CO2.Compared with other filtration control agents,NH4-HPAN performs much better in resisting CO2 contamination,its properties in controlling filtration rate,stabilizing colloid and maintaining good particle size distribution of the system all remain stable.关键词
酸性气藏/降滤失剂/CO2污染/胶体稳定性/粒径分布Key words
Acidic gas reservoir/Filtration control agent/CO2 contamination/Colloid stability/Particle size distribution分类
能源科技引用本文复制引用
张坤,李阳,穆剑雷,李永龙,石亚华,蒲磊,谢凌志..深部地层CO2对抗高温降滤失剂性能弱化规律及机理分析[J].钻井液与完井液,2025,42(4):494-502,9.
