乌鲁木齐河东矿区煤层气压裂裂缝导流能力影响因素研究Study on the Influencing Factors of CBM Fracturing Fracture Flow Capacity on Hedong Mining Area of Urumqi
胡永,周梓欣,仲劼,张伟
摘要(Abstract)：
裂缝导流能力是反应压裂改造效果的重要指标。乌鲁木齐河东矿区具有大倾角、多厚煤层、低煤阶煤层气地质特征。为更好地指导乌鲁木齐河东矿区煤层气压裂施工，采用实验测试的方法，分别研究了时间、闭合压力、铺砂浓度、石英砂支撑剂粒径及组合对压裂改造中裂缝短期导流能力的影响。结果表明：不同铺砂浓度导流能力均随时间的增加而下降，前30min下降幅度较大，随着时间的增加导流能力降幅趋缓，75min导流能力平均下降幅度在65%～70%；不论是不同支撑剂粒径还是不同铺砂浓度，导流能力均随闭合压力增大而降低，但当闭合压力达到20MPa以后，闭合压力增加、导流能力下降趋势变缓；随铺砂浓度的提高，导流能力增大，7.5kg/m2铺砂浓度为该区最小合理铺砂浓度；支撑剂粒径越大，导流能力越强，但也受闭合压力的影响，当闭合压力低于15MPa时，单一粒径16/30目的石英砂的导流能力远高于20/40目和40/70目的导流能力，而当闭合压力高于15MPa时，16/30目和20/40目各比例组合导流能力相差不大，但还是远高于40/70目支撑剂组合的导流能力。
关键词(KeyWords)：
基金项目(Foundation): “十三五”国家科技重大专项“新疆准噶尔、三塘湖盆地煤层气资源与开发技术”（2016ZX05043）
作者(Author): 胡永,周梓欣,仲劼,张伟
参考文献(References)：
- [1]张红军，王渊，杨函．煤层气储层复杂裂缝导流能力影响因素研究[J]．煤矿安全，2022,53(5):21-26.ZHANG H,WANG Y,YANG H. Influencing factors of conductivity of complex fractures in coal-bed methane reservoir[J]. Safety in Coal Mines,2022,53(5):21-26.
- [2]宋璐璐.煤岩裂缝导流能力的实验研究及影响因素分析[J].辽宁化工，2017,46(8):82-784.SONG L. Experimental study on the conductivity of coal rock fracture and analysis of its influencing factors[J]. Liaoning Chemical Industry,2017,46(8):782-784.
- [3]倪小明，于芸芸，曹运兴.HPG破胶液影响下支撑剂导流能力变化特征研究[J].炭科学技术，2016,44(3):86-90.NI X,YU Y,CAO Y. Study on changing characteristics about proppant flow conduc-tivity under the influence of HPG fracturing fluid[J].Coal Science and Technology,2016,44(3):86-90.
- [4]刘岩，苏雪峰，张遂安.煤粉对支撑裂缝导流能力的影响特征及其防控[J].煤炭学报，2017,42(3):687.-693LIU Y,SU X,ZHANG S. Influencing characteristics and control of coal powder to proppant fracture conductivity[J]. Journal of China Coal Society,2017,42(3):687-693.
- [5]张万春，郭布民，孔鹏，等.柿庄南煤层气重复压裂裂缝形态反演及效果分析评价[J].非常规油气，2022(1):119-128.ZHANG W,GUO B,KONG P,et al.Fracture morphology inversion and effect evaluation of CBM refracturing in southern Shizhuang Block[J].Unconventional Oil&Gas,2022(1):119-128.
- [6]袁征，黄杰，袁文奎，等.压裂裂缝长期导流能力衰退规律实验研究[J].非常规油气，2022,9(3):78-82,102.YUAN Z,HUANG J,YUAN W,et al.Experimental study on long term conductivity decline of hydraulic fracturing fracture[J].Unconventional Oil&Gas,2022,9(3):78-82,102.
- [7]赵立安，王志愿，修春红，等.利用压裂施工停泵压力数据计算裂缝高度[J].非常规油气，2022,9(5):129-134,143.ZHAO L,WANG Z,XIU C,et al. Calculation of fracture height using pump-off pressure data in fracturing construction[J]. Unconventional Oil&Gas,2022,9(5):129-134,143.
- [8]熊俊杰，周际永，郭大立，等.支撑剂嵌入对裂缝导流能力的影响[J].重庆科技学院学报（自然科学版），2016,18(3):60-62.XIONG J, ZHOU J, GUO D, et al. The influence of proppant embedment on the diversion capacity of fracture[J]. Journal of Chongqing Universityof Science and Technology(Natural Science Edition),2016,18(3):60-62.
- [9]姜伟，张军，仲劼，等.大倾角煤层水力裂缝扩展物理模拟实验[J].煤田地质与勘探，2020,48(3):45-50.JIANG W,ZHANG J,ZHONG J,et al. Physical simutation experiment investigation on hydraulic fracture propagation in high-dip coal seam[J].Coal Geology&Exploration,2020,48(3):45-50.
- [10]卢海兵，王玉斌，张军，等.新疆大倾角煤层多缝和有效支撑压裂技术研究[J].能源与环保，2021,43(3):70-74.LU H,WANG Y,ZHANG J,et al.Research on multi fracture and effective supporting fracturing technology in large dip coal seam of Xinjiang[J].China Energy and Environmental Protection,2021,43(3):70-74.
- [11]程亮，卢义玉，葛兆龙，等.倾斜煤层水力压裂起裂压力计算模型及判断准则[J].岩土力学，2015,36(2):444-450.CHENG L,LU Y,GE Z,et al. Initiation pressure calculation model and judgment criterion for hydraulic fracturing of inclined coal seam[J].Rock and soil Mechanics,2015,36(2):444-450.
- [12]谢相军.大倾角煤层压裂裂缝延展规律及技术对策研究[D].陕西西安：西安科技大学，2015.XIE X.Study on fracture propagation rule and technical methods of coal seam with high dip angle[D]. Xi’an,Shaanxi:Xi’an University of Science and Technology,2015.
- [13]罗骁.大倾角煤层L井压裂技术研究[D].四川成都：西南石油大学，2016.LUO X. Hydraulic fracruring study of L Well with large dip angle in coal seam[D]. Chengdu,Sichuan:Southwest Petroleum University,2016.
- [14]王志荣，胡凯，杨杰，等.软煤储层顶板水平井穿层工况下压裂缝扩展模型[J].煤田地质与勘探，2019,47(6):20-25.WANG Z,HU K,YANG J,et al. Extension model of fracturing cracks of translayer horizontal well in roof of soft coal reservoir[J]. Coal Geology&Exploration,2019,47(6):20-25.
- [15]张遂安，刘欣佳，温庆志，等.煤层气增产改造技术发展现状与趋势[J].石油学报，2021,42(1):105-118.ZHANG S,LIU X,WEN Q,et al. Development situation and trend of stimulation and reforming technology of coalbed methane[J]. Acta Petrolei Sinica,2021,42(1):105-118.