基于RFPA数值模拟的水力压裂增透影响半径研究

详细信息    查看全文 | 推荐本文 |

英文篇名：Study on Influencing Radius of Hydraulic Fracturing Permeability Based on RFPA Numerical Simulation 作者：边小峰 ; 毕建乙 ; 张辉 英文作者：Bian Xiaofeng;Bi Jianyi;Zhang Hui;Xiegou Coal Mine of Shanxi Xishan Jin Xing Energy Co., Ltd.;Shenyang Research Institute,China Coal Technology Group;State Key Laboratory of Coal Mine Safety Technology; 关键词：水力压裂 ; 卸压增透 ; 剪应力 ; 有效影响半径 英文关键词：Hydraulic fracturing;;Pressure relief;;shear stress;;Effective influencing radius 中文刊名：TMJS 英文刊名：Datong Coal Science & Technology 机构：山西西山晋兴能源有限责任公司斜沟煤矿;煤科集团沈阳研究院有限公司;煤矿安全技术国家重点实验室; 出版日期：2019-06-15 出版单位：同煤科技 年：2019 期：No.167 基金：国家自然科学基金资助项目(51404126);; 国家重大科技产业工程计划(2016ZX05067004-003) 语种：中文; 页：TMJS201903005 页数：4 CN：03 ISSN：14-1117/TD 分类号：22-24+27

摘要

本文针对低渗透煤层抽采效果差、钻孔工程量大及抽采周期长的难题,提出了水力压裂卸压增透技术。通过RFPA~(2D)-Flow模拟研究了压裂过程中压裂孔附近煤体的裂隙裂纹演化规律,在斜沟煤矿18205材料巷实施水力压裂现场试验结果与模拟结果基本一致;压裂区域内钻孔瓦斯抽采浓度增大4.43倍,抽采纯量提高9.62倍,煤层的透气性系数增大14倍,抽采效果得到明显改善。
        Aiming at the problems of poor extraction effect, large borehole volume and long extraction period in low permeability coal seam, Hydraulic fracturing and pressure relief technology was put forward. Through RFPA~(2D)-Flow simulation, the evolution law of cracks in coal seams near fracturing holes during fracturing process was studied. The field test results of hydraulic fracturing in material roadway 18205 of Xiegou Coal Mine were basically consistent with the simulation results. The gas extraction concentration of boreholes in fracturing area increased by 4.43 times, the extraction purity increased by 9.62 times, the permeability coefficient of coal seam increased by 14 times, and the extraction effect was improved obviously.

引文

[1]周西华,毕建乙,王海东,等.高瓦斯低透气性煤层水力压裂增透技术研究[J].世界科技研究与发展,2015,37(3):243-246.
    [2]何福胜,毕建乙,王海东.低透气性煤层水力压裂增透数值模拟研究[J].中国煤炭,2018,44(10):136-142,173.
    [3]许江,马天宇,彭守建,等.煤岩体水力压裂动态演化物理模拟试验研究[J].煤炭科学技术,2017,45(6):9-16.
    [4]石欣雨,文国军,白江浩,等.煤岩水力压裂裂缝扩展物理模拟实验[J].煤炭学报,2016,41(5):1145-1151.
    [5]吴拥政,康红普.煤柱留巷定向水力压裂卸压机理及试验[J].煤炭学报,2017,42(5):1130-1137.