引用本文:王满学,何娜. 液态CO2干法加砂压裂增稠剂技术现状及展望[J]. 石油与天然气化工, 2017, 46(4): 57-62.
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 2405次   下载 1374 本文二维码信息
码上扫一扫!
分享到: 微信 更多
液态CO2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CO2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CO2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CO2干法加砂压裂的技术关键。在现有技术条件下, 建议将液态CO2干法压裂技术与常规无水压裂技术结合,既发挥了液态CO2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 
DOI:10.3969/j.issn.1007-3426.2017.04.011
分类号:
基金项目:
Research progress and prospective in liquid CO2 dry fracturing thickeners technology
Wang Manxue1,He Na2
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 CO2 fracturing thickener at home and abroad, it is proposed to re-understand the molecular structure and physical and chemical characteristics of CO2, 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