第46卷第4期
油气田化学
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
57
液态CO，干法加砂压裂增稠剂技术现状及展望
王满学1何娜2
1.西安石油大学2.中国石油西南油气田公司天然气研究院
摘要CO2干法加砂压裂是低压、低渗透、强水敏等非常规储层高效开发的有效措施之一。系统分析了目前国内外液态CO干法加砂压裂技术中增稠剂现状，对现有增稠剂分子结构进行分析归类，指出了增稠剂存在的主要技术问题和开发的难点。通过对目前国内液态CO：干法压裂技术现状和现场试验情况梳理发现：国内液态CO2增稠剂技术滞后于现场应用，压裂液携砂效率低，影响了压裂施工效果;分析国内外液态CO2增稠剂研究存在的问题，借鉴现有研究成果，依据CO2分子结构特征和理化特性，构建能使液态CO2高效增黏的新型增稠剂分子结构，合成高质量的液态CO2增稠剂，是实现液态CO：干法加砂压裂的技术关键。在现有技术条件下，建议将液态CO：干法压裂技术与常规无水压裂技术结合，既发挥了液态CO：干法压裂技术优势，又实现了高砂比对压裂施工技术要求，满足非常规储层压裂开发需要。
关键词液态CO2干法压裂压裂液增稠剂技术展望
中图分类号：TE357.7
文献标志码：A
D0I: 10.3969/i.issn.1007-3426.2017.04.011
ResearchprogressandprospectiveinliquidCo2
dryfracturingthickenerstechnology
Wang Manxue' ,He Na”
1. Xi' an Petroleum University, Xi'an, Shaanxi, China; 2. Research Institute of Natural Gas Technology
PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, China
Abstract: Liquid CO2 dry fracturing technology is one of the effective measures for the development of unconventional reservoirs such as low pressure , low permeability and strong water sensitivity . The status of thickener in liquid CO2 dry fracturing technology at home and abroad is analyzed, and the molecular structure of the existing thickener is classified . The main problems existing in thickener technology and the difficulties in development are pointed out . The present situation of liquid CO2 dry fracturing technology and the field test results show that liquid CO2 thickener technology has not kept pace with the field application , so that liquid CO2 dry fracturing technology can not achieve sand fracturing . The effects of the technology on the application of liquid CO2 enrichment are discussed. Based on the existing problems of liquid CO fracturing thickener at home and abroad, it is proposed to re-understand the molecular structure and physical and chemical characteristics of CO , instead of imitating the existing research results , to construct and synthesize new type thickener. At the present stage, it is suggested to combine the liquid CO2 dry fracturing technology with the conventional anhydrous fracturing technology , to effectively utilize the advantages of the liquid CO2 dry fracturing technology , to realize the fracturing construction high sand ratio
technology requirements , and to meet the unconventional reservoir fracturing development needs Key words: liquid CO2 , dry fracturing,fracturing fluid, thickener, technology progress
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