许冬进,陶振强,李常兴,熊齐,李静鹏,王俊亭,曲彦颖,吴应松
XU Dongjin,TAO Zhenqiang,LI Changxing,XIONG Qi,LI Jingpeng,WANG Junting,QU Yanying,WU Yingsong

• 1:长江大学石油工程学院
• 2:油气钻采工程湖北省重点实验室
• 3:贵州页岩气勘探开发有限责任公司
• 4:湖北航天化学技术研究所

摘要(Abstract)：

为研究页岩气储层压裂返排一体化过程中裂缝导流能力的变化规律，结合页岩气储层生产特点，模拟了整个压裂—返排—生产的过程，开展气测—液测—气测3个连续阶段裂缝导流能力测试实验，研究了整个过程中裂缝导流能力的变化规律。结果表明：在闭合压力为35 MPa的条件下，采用蒸馏水模拟压裂后，由于页岩水化的作用，石英砂支撑剂的导流能力降低幅度高达80.4%；在模拟返排过程中，按初始气测排量的25%、50%、75%、100%进行气测导流能力实验，裂缝导流能力逐渐升高，实验方案中其最大恢复值为初始值的65.9%；实验模拟了生产过程中由于页岩气井产量变化造成的地层压力波动对裂缝导流能力的影响。研究结果对页岩气储层压裂方案设计优化和高效开发具有一定的参考意义。
In order to study the variation law of fracture conductivity in integrated fracturing-flowback process, combined with production characteristics of shale gas reservoirs, whole fracturing-flowback-production process is simulated for fracture conductivity test experiment of 3 continuous stages of gas testing-liquid testing-gas testing and study on variation law of fracture conductivity in the whole process. The results show that, at closure pressure of 35 MPa, damage range of quartz sand proppant conductivity is up to 80.4% caused by shale hydration after simulated fracturing with distilled water. In the process of simulated flowback, gas testing conductivity experiment is carried out with 25%, 50%, 75% and 100% of initial gas displacement. Fracture conductivity increases continuously, with maximum recovery value of 65.9% of original value in experimental scheme. The experiment simulates the influence of formation pressure fluctuation caused by shale gas well production change on fracture conductivity in production process. The research has reference significance for fracturing scheme design optimization and efficient development of shale gas reservoirs.

关键词(KeyWords)： 页岩气储层;水力压裂;导流能力;压裂液返排;裂缝伤害;压力波动
shale gas reservoir;hydraulic fracturing;conductivity;flowback of fracturing fluid;fracture damage;pressure fluctuation

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目“页岩气藏水平井压裂缝网流动表征及反演优化方法研究”（52004033）

作者(Author): 许冬进,陶振强,李常兴,熊齐,李静鹏,王俊亭,曲彦颖,吴应松
XU Dongjin,TAO Zhenqiang,LI Changxing,XIONG Qi,LI Jingpeng,WANG Junting,QU Yanying,WU Yingsong

DOI: 10.19597/J.ISSN.1000-3754.202308008

参考文献(References)：

• [1]姜浒，刘书杰，何保生，等.页岩气储层水力压裂机理研究[J].科学技术与工程，2014,14(12):23-25.JIANG Hu,LIU Shujie,HE Baosheng,et al. Mechanism study of hydraulic fracturing of shale gas reservoir[J]. Science Technology and Engineering,2014,14(12):23-25.
• [2]蒋裕强，董大忠，漆麟，等.页岩气储层的基本特征及其评价[J].天然气工业，2010,30(10):7-12,113-114.JIANG Yuqiang,DONG Dazhong,QI Lin,et al. Basic features and evaluation of shale gas reservoirs[J]. Natural Gas Industry,2010,30(10):7-12,113-114.
• [3] WANG X,WINTERFELD P,MA X,et al. Simulation of coupled hydraulic fracturing propagation and gas well performance in shale gas reservoirs[C]. Woodlands:SPE Unconventional Resources Conference,2014.
• [4]琚宜文，卜红玲，王国昌.页岩气储层主要特征及其对储层改造的影响[J].地球科学进展，2014,29(4):492-506.JU Yiwen, BU Hongling, WANG Guochang. Main characteristics of shale gas reservoir and its effect on the reservoir reconstruction[J]. Advances in Earth Science,2014,29(4):492-506.
• [5] CARPENTER C. Fracturing-treatment design and reservoir properties impact shale-gas production[J]. Journal of Petroleum Technology,2013,65(10):134-139.
• [6]曲占庆，黄德胜，杨阳，等.气藏压裂裂缝导流能力影响因素实验研究[J].断块油气田，2014,21(3):390-393.QU Zhanqing, HUANG Desheng, YANG Yang, et al. Experimental research on influence factors of fracture conductivity in gas reservoir[J]. Fault-Block Oil&Gas Field, 2014, 21(3):390-393.
• [7]何思源，赵立强，罗志锋，等.致密砂岩支撑裂缝气测导流能力研究[J].油气藏评价与开发，2018,8(6):45-50.HE Siyuan, ZHAO Liqiang, LUO Zhifeng, et al. Study on indoor gas measurement of supporting fracture conductivity of tight sandstone[J]. Reservoir Evaluation and Development,2018,8(6):45-50.
• [8]肖凤朝，张士诚，李雪晨，等.组合粒径+滑溜水携砂铺置规律及导流能力：以吉木萨尔页岩油储层为例[J].大庆石油地质与开发，2023,42(6):167-174.XIAO Fengchao,ZHANG Shicheng,LI Xuechen,et al. Placement law and flow conductivity of sand-carrying combined particle sizes+slickwater:Taking Jimsar shale oil reservoir as an example[J]. Petroleum Geology&Oilfield Development in Daqing,2023,42(6):167-174.
• [9]浮历沛.通道压裂用自聚性支撑剂研究[D].青岛：中国石油大学（华东），2017.FU Lipei. Study on self-aggregating proppant in channel fracturing[D]. Qingdao:China University of Petroleum(East China),2017.
• [10]王彦兴，路勇，王旗，等.适合致密砂砾岩储层的多功能滑溜水压裂液体系研制与评价[J].大庆石油地质与开发，2023,42(2):160-166.WANG Yanxing,LU Yong,WANG Qi,et al. Development and evaluation of multi-functional slick water fracturing fluid system for tight glutenite reservoir[J]. Petroleum Geology&Oilfield Development in Daqing,2023,42(2):160-166.
• [11]王雷，张士诚，张文宗，等.复合压裂不同粒径支撑剂组合长期导流能力实验研究[J].天然气工业，2005,25(9):64-66,155-156.WANG Lei, ZHANG Shicheng, ZHANG Wenzong, et al.Experimental research on long-term conductivity of the proppant combination with different grain sizes in complex fracturing[J].Natural Gas Industry,2005,25(9):64-66,55-156.
• [12] ELPUTRANTO R,CIRDI A P,AKKUTLU I Y. Formation damage mechanisms due to hydraulic fracturing of shale gas wells[C]. Amsterdam:SPE Europec Featured at 82nd EAGE conference and Exhibition,2020.
• [13]纪国法，王晓燕，南晨阳，等.基于最优裂缝导流能力的水平井压裂后生产指数预测新方法[J].大庆石油地质与开发，2023,42(6):59-66.JI Guofa,WANG Xiaoyan,NAN Chenyang,et al. A new prediction method for postfracturing productivity index of horizontal well based on the optimal fracture conductivity[J]. Petroleum Geology&Oilfield Development in Daqing, 2023, 42(6):59-66.
• [14]刘启国，唐伏平，冯国庆，等.开关井不同程度应力敏感效应对井底压力动态的影响[J].石油与天然气地质，2007,28(4):523-527.LIU Qiguo,TANG Fuping,FENG Guoqing,et al. Influence of different stress sensitivities on bottom hole pressure behaviors during well opening and shut-in[J]. Oil&Gas Geology,2007,28(4):523-527.
• [15]刘超，王文耀，刘林森，等.多相流条件下支撑裂缝导流能力实验研究[J].重庆科技学院学报（自然科学版），2010,12(2):83-85.LIU Chao, WANG Wenyao, LIU Linsen, et al. Experimental research on flow conductivity of propping fracture under multiphase flow[J]. Journal of Chongqing University of Science and Technology(Natural Science Edition),2010,12(2):83-85.
• [16]孟磊，史华，周长静，等.致密气藏压裂用支撑剂导流能力评价及优化[J].西安石油大学学报（自然科学版），2022,37(5):59-64.MENG Lei,SHI Hua,ZHOU Changjing,et al. Evaluation and optimization of conductivity of fracturing proppants for tight gas reservoirs[J]. Journal of Xi’an Shiyou University(Natural Science Edition),2022,37(5):59-64.
• [17]孙永鹏，王传熙，戴彩丽，等.致密砂岩气藏自支撑裂缝损伤机理及导流能力研究[J].特种油气藏，2023,30(3):81-87.SUN Yongpeng, WANG Chuanxi, DAI Caili, et al. Study on damage mechanism and conductivity of unpropped fractures in tight sandstone gas reservoirs[J]. Special Oil&Gas Reservoirs,2023,30(3):81-87.
• [18]陈昱辛.油气井压后返排机理及工作制度优化方法研究[D].青岛：中国石油大学（华东），2019.CHEN Yuxin. Research on flowback mechanism and optimization method of working system after hydraulic fracturing[D].Qingdao:China University of Petroleum(East China),2019.
• [19]蒋建方，张智勇，胥云，等.液测和气测支撑裂缝导流能力室内实验研究[J].石油钻采工艺，2008,30(1):67-70.JIANG Jianfang, ZHANG Zhiyong, XU Yun, et al. Laboratory research on propping fracture conductivity based on gas logging and liquid logging[J]. Oil Drilling&Production Technology,2008,30(1):67-70.
• [20]任岚，胡哲瑜，赵金洲，等.基于缝网导流有效性评价的深层页岩气压裂支撑剂优化设计[J].大庆石油地质与开发，2023,42(3):148-157.REN Lan, HU Zheyu, ZHAO Jinzhou, et al. Optimization design of deep shale gas fracturing proppant based on conductivity effectiveness evaluation of fracture network[J]. Petroleum Geology&Oilfield Development in Daqing, 2023, 42(3):148-157.
• [21]苏映宏，吴忠维，崔传智，等.水力压裂支撑裂缝导流能力计算与分析[J].大庆石油地质与开发，2021,40(6):62-71.SU Yinghong,WU Zhongwei,CUI Chuanzhi,et al. Calculation and analysis of the propped fracture conductivity created by hydraulic fracturing[J]. Petroleum Geology&Oilfield Development in Daqing,2021,40(6):62-71.
• [22]王雷，王琦.页岩气储层水力压裂复杂裂缝导流能力实验研究[J].西安石油大学学报（自然科学版），2017,32(3):73-77.WANG Lei,WANG Qi. Experimental research on seepage capacity of complex fracture in shale gas reservoir after hydraulic fracturing[J]. Journal of Xi’an Shiyou University(Natural Science Edition),2017,32(3):73-77.