胡永全,王强,史向阳,侯庆香,张倩,赵金洲
HU Yongquan,WANG Qiang,SHI Xiangyang,HOU Qingxiang,ZHANG Qian,ZHAO Jinzhou

• 1:西南石油大学油气藏地质及开发工程国家重点实验室
• 2:中国石油天然气股份有限公司华北油田分公司第一采油厂
• 3:青海油田采油三厂

摘要(Abstract)：

为深入研究水力裂缝几何形态变化,基于热流固耦合基本理论,将压裂过程中物性参数视为应力、应变、孔隙压力、温度的函数,采用位移不连续法、有限差分、迭代等计算方法,分析热流、流固、热流固、非热流固耦合条件等因素对裂缝形态的影响。结果表明:压裂过程中耦合作用对储层温度场影响较小,对井底附近裂缝内流体温度影响较大;考虑耦合效应与不考虑耦合效应条件下,裂缝形态有较大差异,流固、热流固耦合作用使裂缝长度、缝内流体压力、缝宽相对减小,而热流耦合作用则相反;相对非热流固耦合条件,流固耦合影响最为突出,热流耦合影响相对较小,热流固耦合作用下裂缝形态与现场测试数据最为匹配。
In order to further study the changes of the geometrical shape of the hydraulic fracture,on the basis of the basic theory of thermo-hydro-mechanical coupling,the physical parameters in the fracturing process regard as the functions of the stress,strain,pore pressure and temperature. With the help of the calculating methods of DDM( displacement discontinuity method),finite difference and iterative calculating method,the influences of four coupling conditions of the thermo-hydro( TH),hydro-mechanical( HM),thermo-hydro-mechanical( THM) and nonthermo-hydro-mechanical( NTHM) on the crack morphology were analyzed. The achievements show that the coupling actions has little effects on the reservoir temperature,while they possess great influences on the fluid temperature in the fracture near the well bottom; the fracture morphology presents rather obvious differences when taking the coupling effects into account or not,the HM and THM coupling effects can relatively decrease the fracture length,fluid pressure within the fracture and the crack width,while the TH coupling effect manifests an oppositeaction; Corresponding to the NTHM coupling condition,The influence of HM coupling is the most prominent,the effect of TM coupling is relatively small,under the interaction of THM coupling,the shapes of the crack match best with the field tested data.

关键词(KeyWords)： 水力压裂;裂缝形态;热流固耦合;流固耦合;有限差分
hydraulic fracturing;crack/fracture morphology;thermo-hydro-mechanical(THM) coupling;hydromechanical(HM) coupling;finite difference

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目“基于多尺度页岩复杂流动行为的动态评价模型研究”(51404204);; 中国石油化工股份有限公司科研项目“裂缝动态扩展影响因素研究”(31400026-16-ZC0607-0013)

作者(Author): 胡永全,王强,史向阳,侯庆香,张倩,赵金洲
HU Yongquan,WANG Qiang,SHI Xiangyang,HOU Qingxiang,ZHANG Qian,ZHAO Jinzhou

DOI: 10.19597/j.issn.1000-3754.201710040

参考文献(References)：

• [1]祝浪涛,廖新维,赵晓亮,等.致密油藏直井体积压裂压力分析模型[J].大庆石油地质与开发,2017,36(6):146-153.
• [2]马庆利.东营凹陷多薄层低渗透滩坝砂储层分层压裂工艺优化[J].油气地质与采收率,2017,24(2):121-126.
• [3]李帅,丁云宏,才博,等.致密油藏体积压裂水平井数值模拟及井底流压分析[J].大庆石油地质与开发,2016,35(4):156-160.
• [4]Settari A,Cleary M P.Development and testing of a pseudo-threedimensional model hydraulic fracture geometry[R].SPE10505,1986.
• [5]Clifton R J.Modeling of poroelastic effects in hydraulic fracturing[R].SPE 21871,1991.
• [6]Wick T,Singh G,Wheeler M F.Pressurized-fracture propagetion using a phase-field approach coupled to a reservoir simulator[R].SPE 168597,2014.
• [7]Ouchi H,Katiyar A,Foster J,et al.A peridynamics model for the propagation of hydralic fractures in heterogeneous,naturally fractured reservoirs[R].SPE 173361,2015.
• [8]Noorishad J,Tsang C F,Witherspoon P A.Coupled thermal-hydraulic-mechanical phenomena in saturated fractured porous rocks:Numerical approach[J].Journal of Geophysical Research,1984,89(B12):10365-10373.
• [9]Pak A,Chan D H.A fully Implicit single phase T-H-M fracture model for modelling hydraulic fracturing in oil sands[J].Journal of Canadian Petroleum Technology,2004,43(6):35-44.
• [10]Li Sanbai,Li Xiang,Zhang Dongxiao.A fully coupled thermohydro-mechanical,three-dimensional model for hydraulic stimulation treatments[J].Journal of Natural Gas Science and Engineering,2016,34(8):64-84.
• [11]赵金洲,李勇明,王松,等.天然裂缝影响下的复杂压裂裂缝网络模拟[J].天然气工业,2014,34(1):68-73.
• [12]曾庆磊,庄茁,柳占立,等.页岩水力压裂中多簇裂缝扩展的全耦合模拟[J].计算力学学报,2016,33(4):643-648.
• [13]孙可明,张树翠.含层理页岩气藏水力压裂裂纹扩展规律解析分析[J].力学学报,2016,48(5):1229-1236.
• [14]孔祥言,李道伦,徐献芝,等.热—流—固耦合渗流的数学模型研究[J].水动力学研究与进展,2005,20(2):269-275.
• [15]刘晓旭.三场耦合的数学模型研究及有限元解法[D].南充:西南石油学院,2005.
• [16]朱万成,魏晨慧,田军,等.岩石损伤过程中的热-流-力耦合模型及其应用初探[J].岩土力学,2009,30(12):3851-3857.
• [17]李进步,王继平,王艳,等.致密砂岩储层中气体渗流规律实验研究[J].大庆石油地质与开发,2017,36(6):154-158.
• [18]王自明.油藏热流固耦合模型研究及应用初探[D].南充:西南石油学院,2002.
• [19]England A H,Green A E.Some two-dimensional punch and crack problems in classical elasticity[J].Mathematical Proceedings of the Cambridge Philosophical Society,1963,59(2):489-500.
• [20]Lamb H.Hydrodynamics[M].New York:Dover Publications,1932:581-587.
• [21]任岚,林然,赵金洲.基于最优SRV的页岩气水平井压裂簇间距优化设计[J].天然气工业,2017,37(4):69-79.
• [22]黄静.卢草沟致密油储层水平井体积压裂簇间距优化研究[D].成都:西南石油大学,2016.
• [23]Kamphuis H,Davies D R,Roodhart L P.A new stimulation for the Calculation of the in-situ temperature profile during well stimulation fracturing treatment[J].The Journal of Canadian Petroleum Technology,1993,32(5):38-47.
• [24]王强,胡永全,任岚.水力压裂裂缝及近缝储层温度场[J].大庆石油地质与开发,2018,37(1):98-102.
• [25]张华,刘义刚,周法元,等.海上稠油多元热流体注采一体化关键技术研究[J].特种油气藏,2017,24(4):171-188.
• [26]冉启全,李士伦.流固耦合油藏数值模拟中物性参数动态模型研究[J].石油勘探与开发,1997,24(3):61-65.
• [27]王鸿勋,张士诚.水力压裂设计数值计算方法[M].北京:石油工业出版社,1998:90-98.