高压水力压裂和二氧化碳相变致裂联合增透技术

发布时间：2018-05-10 21:28

本文选题：高压水力压裂 + 二氧化碳相变致裂　；参考：《煤炭科学技术》2017年07期

【摘要】：针对白皎煤矿地质构造复杂、构造应力大、煤层透气性差、抽采瓦斯效果差的问题,提出了高压水力压裂和二氧化碳相变致裂联合增透技术,分析了水力压裂和二氧化碳相变致裂联合增透技术的原理;并在238底板巷对B4煤层进行了联合增透对比试验研究。试验结果表明:试验区域煤层透气性显著提高,单孔初抽瓦斯体积分数分别是高压水力压裂试验区域和普通抽采试验区域平均瓦斯体积分数的1.70、3.48倍;瓦斯抽采纯量较水力压裂区域和普通抽采区域分别提高了1.49、3.04倍;抽采65 d以后,高压水力压裂和二氧化碳相变致裂联合增透区域汇总瓦斯体积分数仍保持在40%以上,抽采效果良好,该技术可供类似矿井借鉴。
[Abstract]:Aiming at the problems of complex geological structure, large tectonic stress, poor permeability of coal seam and poor gas drainage effect in Baijiao Coal Mine, the combined anti-permeability technology of high-pressure hydraulic fracturing and carbon dioxide phase change fracturing is put forward. The principle of hydraulic fracturing and carbon dioxide phase change combined antireflection technique is analyzed, and a comparative study on the combined antireflection of B _ 4 coal seam is carried out in 238 floor roadway. The test results show that the permeability of coal seam in test area is improved significantly, and the initial gas volume fraction of single hole is 1.70 ~ 3.48 times that of the average gas volume fraction in high pressure hydraulic fracturing test area and common drainage test area respectively. Compared with hydraulic fracturing area and common extraction area, the scalar quantity of gas extraction increased by 1.49 ~ 3.04 times respectively, and after 65 days of extraction, the total gas volume fraction in the combined anti-permeability area caused by high-pressure hydraulic fracturing and carbon dioxide phase change still remained above 40%. The extraction effect is good and the technology can be used for reference in similar mines.
【作者单位】：重庆工程职业技术学院;中煤科工集团重庆研究院有限公司;
【基金】：国家自然科学基金资助项目(51204217) 重庆市科学技术研究资助项目(KJ1732437)
【分类号】：TD712.6

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