西南石油大学学报（自然科学版）2026，Vol.48Issue(3)：53-67,15.DOI:10.11885/j.issn.1674-5086.2024.09.11.01
常压页岩气层压裂液损害的亚临界或超临界水修复思路与机理
The Remediation Mechanism of Subcritical or Supercritical Water for Fracturing Fluid Damage in Normal-pressure Shale Gas Formation
摘要
Abstract
The weak formation energy and retained fracturing fluid in the normal-pressure gas shale formation tend to cause formation damage,resulting in a rapid decline in the production of shale gas wells and low ultimate recovery after hydraulic fracturing.In this research,the normal-pressure shale gas formation in southeast Chongqing is considered as the research object.A scientific conception of relieving fracturing fluid damage by subcritical or supercritical water stimulation is innovatively pro-posed after clarifying the formation damage mechanisms of fracturing fluid invasion and the solution to relievie such formation damage.This method can improve the aqueous phase mobility and the gas flow capacity in shale matrix.The engineering and geological characteristics of shale gas reservoirs after hydraulic fracturing are considered,so the scientific conception is qualified as practical.Furthermore,dissolving minerals/organic matter and inducing fractures in the shale matrix via sub-and supercritical water remediation are investigated through experiments.The results show that the porosity and permeability of shale samples are greatly enhanced due to a large number of submicron-micron intragranular and interparticle dissolution pores generated.A high-temperature thermophysical effect and a subcritical or supercritical water catalytic oxidative dissolution eff-ect are considered as the main mechanisms of relieving aqueous phase trapping damage in a shale gas reservoir.The application prospect of subcritical or supercritical water remediation is forecasted from the aspects of synergizing with hydraulic fracturing and the green and low-carbon concept in shale gas development.关键词
常压页岩气/滞留压裂液/储层保护/多尺度/孔隙结构/亚临界或超临界水Key words
normal-pressure shale gas/retained fracturing fluid/formation damage control/multiscale/pore structure/subcrit-ical or supercritical water分类
能源科技引用本文复制引用
陈明君,李佩松,康毅力,陈掌星,游利军,颜茂凌..常压页岩气层压裂液损害的亚临界或超临界水修复思路与机理[J].西南石油大学学报（自然科学版）,2026,48(3):53-67,15.基金项目
国家自然科学基金(42572174) （42572174）
四川省自然科学基金(2026NSFSC0339) （2026NSFSC0339）
非常规油气层保护四川省青年科技创新研究团队项目(2021JDTD0017) （2021JDTD0017）
中国石油科技创新基金项目(2024DQ02-0112) （2024DQ02-0112）
