低渗污染地层气液驱动原位压裂增渗技术与设备  

Gas-liquid driven in-situ fracturing technology and equipment for a low permeability formation

作　　者：侯冰 崔壮 张丰收 徐泉[4] 冯世进[3] 陈宏信 纪东奇 HOU Bing;CUI Zhuang;ZHANG Fengshou;XU Quan;FENG Shijin;CHEN Hongxin;JI Dongqi(College of Petroleum Engineering,China University of Petroleum(Beijing)at Karamay,Karamay 834000,China;National Key Laboratory of Petroleum Resources and Engineering,China University of Petroleum,Beijing 102249,China;College of Civil Engineering,Tongji University,Shanghai 200092,China;College of New Energy and Materials,China University of Petroleum,Beijing 102249,China;College of Energy,China University of Geosciences,Beijing 100083,China)

机构地区：[1]中国石油大学(北京)克拉玛依校区石油学院,新疆克拉玛依834000 [2]中国石油大学(北京)油气资源与工程全国重点实验室,北京102249 [3]同济大学土木工程学院,上海200092 [4]中国石油大学(北京)新能源与材料学院,北京102249 [5]中国地质大学(北京)能源学院,北京100083

出　　处：《石油科学通报》2023年第5期614-625,共12页Petroleum Science Bulletin

基　　金：国家重点研发计划(2020YFC1808102)资助。

摘　　要：我国土地受工业开发长期影响,低渗地层污染现象十分严重,低渗污染场地亟待高效快速修复。传统异位修复技术对土壤扰动强,生态环境恢复缓慢,不足以解决目前的修复困境,原位立体缝网压裂修复技术的研究刻不容缓。低渗污染场地立体修复目前面临土层裂隙扩展机理不明、现有支撑剂易在主裂缝口沉降和压裂设备碎片化等难题,受实验条件和机理研究制约,在低渗土层缝网扩展机理、多场耦合、新型支撑剂和一体化压裂装备等方面需要进一步突破。本文重点研究低渗介质多场耦合下力学行为及提高原位压裂裂隙有效支撑的压裂装备进展和可行性,提出土体缝网起裂和扩展机理、流-固-化多场耦合模型、新型可控仿贻贝覆膜支撑剂和气液驱动压裂技术及装备等关键研究要点,指导低渗污染地层气液驱动缝网压裂增渗修复设计,提高药剂的传输效率和铺置范围,实现低渗污染场地原位立体高效修复。China’s land has been affected by industrial development for a long time,and the pollution of low-permeability formations is very serious,so low-permeability contaminated sites need to be efficiently and quickly restored.Traditional ex-situ restoration technology has strong soil disturbance and slow restoration of the ecological environment,which is not enough to solve the current restoration dilemma.Therefore,the in-situ three-dimensional fracture network remediation technology needs to be studied urgently.At present,three-dimensional remediation of low permeability contaminated sites is faced with problems such as unknown mechanism of soil fracture propagation,easy settlement of existing proppant at the main fracture mouth and fracturing equipment fragmentation.Restricted by experimental conditions and mechanism research,further breakthroughs are needed into fracture network spreading mechanisms,multi-field coupling,new proppants and integrated fracturing equipment in a low permeability soil layer.This paper focuses on the mechanical behavior of low-permeability media under multi-field coupling and the progress and feasibility of fracturing equipment to improve the effective support of in-situ fractures.The key research points,such as the mechanism of soil fracture initiation and propagation,the fluid-solid-chemical multi-field coupling model,the new controllable mussel film-like proppant and gas-hydraulic driven fracturing technology and equipment,are put forward.It can guide the design of gas-liquid driven fracture network fracturing and infiltration enhancement repair of low permeability polluted formation,improve the transmission efficiency and placement range of agents,and realize the in-situ three-dimensional and efficient repair of low permeability contaminated sites.

关 键 词：原位修复 气液驱动 压裂增渗 仿生材料 增渗设备 

分 类 号：X53[环境科学与工程—环境工程]