煤矿安全2024，Vol.55Issue(9)：71-77,7.DOI:10.13347/j.cnki.mkaq.20230890
深部煤层气藏低伤害胍胶压裂液评价与应用
Evaluation and application of low damage guar gum fracturing fluid in deep coalbed methane reservoirs
摘要
Abstract
An evaluation of low damage guar gum fracturing fluid system based on deep coalbed methane reservoir stimulation was carried out,its on-site application research was conducted.The results indicate that the gel breaking time decreases with increasing temperature.Low damage guar gum fracturing fluid has a significant breaking expression in a short period of time at temperature above 40℃,which is not obvious at 20℃and 30℃.The permeability of coal core is sensitive to temperature,which leads to an in-crease in core damage rate,but the amplitude of change is relatively small.For low damage guar gum fracturing fluid,the increase rate of temperature sensitivity of coal core to damage rate is much lower than the decrease rate of guar gum fracturing fluid damage rate to coal core with the increasing temperature from 20℃to 40℃.Overall,the damage rate of guar gum fracturing fluid to coal core significantly decreases with the increase of temperature.For active water,the damage rate of active water to coal core increases when the temperature rises from 20℃to 40℃.The backflow fluid viscosity reaches 5 mPa·s of guar gum fracturing in 2 hours at temperatures above 40℃,meeting the needs of on-site construction.By comparing the fracturing results of low damage guar gum fracturing and active water in the same well and horizontal well at the same layer,low damage guar gum fracturing fluid can achieve a fracturing process with less injection volume,larger sand volume,higher sand ratio,and smoother pressure.关键词
深部煤层气/低伤害胍胶/压裂液/活性水/温度敏感性Key words
deep coalbed methane/low damage guar gum/fracturing fluid/active water/temperature sensitivity分类
矿业与冶金引用本文复制引用
张永成,刘亮亮,李德慧,白杨,张为,秦玉霞..深部煤层气藏低伤害胍胶压裂液评价与应用[J].煤矿安全,2024,55(9):71-77,7.基金项目
国家自然科学基金资助项目(52274014) （52274014）
山西省重点研发计划资助项目(202202080301010) （202202080301010）
山西省揭榜招标资助项目(20201101004) （20201101004）
