TOUGH-FLAC3D热流固耦合模拟煤储层水力压裂过程

doi:10.11743/ogg20180319

石油与天然气地质 ›› 2018, Vol. 39 ›› Issue (3): 611-619.doi: 10.11743/ogg20180319

TOUGH-FLAC^3D热流固耦合模拟煤储层水力压裂过程

袁学浩¹, 姚艳斌¹, 甘泉², 刘大锰¹, 周智³

1. 中国地质大学(北京) 能源学院, 北京 100083;
2. 阿伯丁大学地球科学学院石油地质系, 英国阿伯丁 AB24 3TU;
3. 中国石油华北油田分公司, 河北任丘 062552

收稿日期:2017-11-03 修回日期:2018-01-05 出版日期:2018-06-28 发布日期:2018-06-21
第一作者简介:袁学浩(1993-),男,硕士研究生,非常规油气地质理论与开发。E-mail:harry19950209@sian.com。
基金项目:
山西省煤基重点科技攻关资助项目（MQ2014-01）；中国石油股份公司重大专项（2017E-1404）。

Investigation of hydraulic fracturing process in coal reservoir by a coupled thermo-hydro-mechanical simulator TOUGH-FLAC^3D

Yuan Xuehao¹, Yao Yanbin¹, Gan Quan², Liu Dameng¹, Zhou Zhi³

1. School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China;
2. Department of Petroleum Geology, School of Geosciences, University of Aberdeen, AB24 3TU Aberdeen, UK;
3. Huabei Oilfield Company, PetroChina, Renqiu, Hebei 062552, China

Received:2017-11-03 Revised:2018-01-05 Online:2018-06-28 Published:2018-06-21

摘要/Abstract

摘要： 以沁水盆地南部安泽区块煤层气储层为例，将TOUGH与FLAC^3D搭接耦合来设计模拟，以实现对煤储层水力压裂热-流-固耦合的分析，进而获得在多场控制下的裂缝扩展与穿层规律。研究结果表明：水力裂缝沿着先存裂缝方向扩展更容易发生于二者以较小逼近角相交时。当逼近角较大时，水力裂缝会沿着最大主应力方向扩展。在垂向平面上，由于煤岩与顶底板岩石力学性质差异显著且煤层微裂隙发育，压力在煤层当中传播速度快于在顶底板中，导致在煤层中靠近顶底板的交界面处，形成两个相对高压区域。同时埋深较深的煤层由于原地应力较大，相比于浅层煤层，更易发生塑性变形。深部煤层由于压裂液滤失系数较小且垂向应力较大造成的流压积累，是顶底板被压穿的主要原因。煤样物理实验和压裂曲线分析的结果验证了此次模拟结论的准确性。

关键词: 多场耦合, 数值模拟, 水力压裂, 煤层气, 安泽区块, 沁水盆地

Abstract: A coal-bed methane reservoir of the Anze Block,southern Qinshui Basin,is the chosen study area.The research developed a simulator linking TOUGH with FLAC^3D to analyze thermo-hydro-mechanical coupling during hydraulic fracturing in the coal reservoir,and then to reveal the rules of fracture propagation and bed-penetrating under the constraint of multiple fields.The results show that hydraulic fractures that propagate along the pre-existing natural fracture's direction,tend to occur when the two fractures intersect with a small approaching angle; otherwise,hydraulic fractures will propagate along the direction of the maximum horizontal principal stress.Due to the distinctive difference of rock mechanical properties between coalbed and its roof and floor beds,and high density of micro-fractures in the coalbed,the pressure in the coalbed propagates faster than that in the roof and floor rocks seen from vertical profiles,which results in two relatively higher pressure zones near the boundaries from coalbed to roof and coalbed to floor rocks respectively.In addition,compared with the shallowly buried coalbed,the deeply buried one is subjected to plastic deformation under an existing bigger in-situ pressure.The major reason for roof/floor fracture penetration is the occurrence of flow pressure accumulation,caused by the relative small leak-off rate of fracturing fluid and relatively bigger vertical stress than that of the shallow bed.The results of sampled coal experiments and fracturing curve analysis verify the accuracy of the simulation.

Key words: multi-field coupling, numerical simulation, hydraulic fracturing, coalbed methane, Anze Block, Qinshui Basin

中图分类号:

TE357

袁学浩,姚艳斌,甘泉,等. TOUGH-FLAC^3D热流固耦合模拟煤储层水力压裂过程[J]. 石油与天然气地质, 2018, 39(3): 611-619. doi: 10.11743/ogg20180319 Yuan Xuehao,Yao Yanbin,Gan Quan,et al. Investigation of hydraulic fracturing process in coal reservoir by a coupled thermo-hydro-mechanical simulator TOUGH-FLAC^3D[J]. Oil & Gas Geology, 2018, 39(3): 611-619. doi: 10.11743/ogg20180319

参考文献

[1] Ferrill D A,Morris A P,Hennings P H,et al.Faulting and fracturing in shale and self-source reservoirs:Introduction[J].AAPG Bulletin,2014,98(11):2161-2164.
[2] Huang B,Liu C,Fu J,et al.Hydraulic fracturing after water pressure control blasting for increased fracturing[J].International Journal of Rock Mechanics & Mining Sciences,2011,48(6):976-983.
[3] Zhang J C.Numerical simulation of hydraulic fracturing coalbed methane reservoir.Fuel 2014; 136:57-61.
[4] 李同林.煤岩层水力压裂造缝机理分析[J].天然气工业,1997,17(tr):53-56. Li Tonglin.Analysis of coalbed hydraulic fracturing mechanism[J].Natural Gas Industry,1997,17(tr):53-56.
[5] 单学军,张士诚,李安启,等.煤层气井压裂裂缝扩展规律分析[J].天然气工业,2005,25(1):130-132. Shan Xuejun,Zhang Shicheng,Li Anqi,et al.Analyzing the fracture extended law of hydraulic fracturing in coalbed gas wells[J].Natural Gas Industry,2005,25(1):130-132.
[6] 郝艳丽,王河清,李玉魁.煤层气井压裂施工压力与裂缝形态简析[J].煤田地质与勘探,2001,29(3):20-22. Hao Yanli,Wang Qinghe,Li Yukui.Simplified analysis of fracture treating pressure and fracture morphology in coalbed gas well[J].Coal Geology & Exploration,2001,29(3):20-22.
[7] Blanton T L.An experimental study of interaction between hydraulically induced and pre-existing fractures.In:SPE 10847,presented at the SPE/DOE unconventional gas recovery symposium,Pittsburgh; May 16-18,1982.
[8] 计勇,郭大立,王东浩,等.综合应用多种压裂软件技术研究[J].重庆科技学院学报:自然科学版,2009,11(3):135-137. Ji Yong,Guo Dali,Wang Donghao,et al.Research on application of various fracturing software technology[J].Journal of Chongqing University of Science and Technology,2009,11(3):135-137.
[9] 李勇明,郭建春,赵金洲.油藏整体压裂数值模拟软件的研制与应用[J].断块油气田,2004,11(5):37-39. Li Yongming,Guo Jianchun,Zhao Jinzhou.Development and application of integral fracturing simulation software[J].Fault-Block Oil & Gas Field,2004,11(5):37-39.
[10] 李士斌,李磊,张立刚.清水压裂多场耦合下裂缝扩展规律数值模拟分析[J].石油化工高等学校学报,2014,27(1):42-47. Li Shibin,Li Lei,Zhang Ligang.The numerical simulation analysis of crack propagation law under riverfrac treatment multi-field coupling[J].Journal of Petrochemical Universities,2014,27(1):42-47.
[11] Xu T,Sonnenthal E,Spycher N,et al.TOUGHREACT-a simulation program for non-isothermal multiphase reactive geochemical transport in variably saturated geologic media:Applications to geothermal injectivity and CO2 geological sequestration[J].Computers & Geosciences,2006,32(2):145-165.
[12] 于子望,张延军,张庆,等.TOUGHREACT搭接FLAC3D算法[J].吉林大学学报(地球科学版),2013(1):199-206. Yu Ziwang,Zhang Yanjun,Zhang Qing,et al.Algorithm of TOUGHREACT links to FLAC3D[J].Journal of Jilin University(Earth Science Edition),2013(1):199-206.
[13] Zhou L,Guo J C.3D Modeling of hydraulic fracturing in tight gas reservoirs by using of FLAC3D and validation through comparison with fracPro[J].Advanced Materials Research,2012,524-527:1293-1299.
[14] Rutqvist J,Wu Y S,Tsang C F,et al.A modeling approach for analysis of coupled multiphase fluid flow,heat transfer,and deformation in fractured porous rock[J].International Journal of Rock Mechanics & Mining Sciences,2002,39(4):429-442.
[15] Jeffrey R G.Propped fractured geometry of three hydraulic fractures in Sydney basin coal seams[J],SPE 50061,1998.
[16] Gan Q,Elsworth D.Production optimization in fractured geothermal reservoirs by coupled discrete fracture network modeling[J].Geothermics,2016,62:131-142.
[17] Gan Q,Elsworth D.A continuum model for coupled stress and fluid flow in discrete fracture networks[J].Geomechanics and Geophysics for Geo-Energy and Geo-Resources,2016,2(1):43-61.
[18] 许露露.沁南盆地南部郑庄-安泽区煤储层水力裂缝扩展规律研究[D].北京:中国地质大学(北京),2014:59-77. Xu Lulu.Mechanism of hydraulic fracture propagation of the coal reservoir in the Zhengzhuang-Anze field,southern Qinshui Basin,China[D].China University of Geosciences,Beijing,2014:59-77.
[19] 许露露,崔金榜,黄赛鹏,等.煤层气储层水力压裂裂缝扩展模型分析及应用[J].煤炭学报,2014,(10):2068-2074. Xu Lulu,Cui Jingbang,Huang Saipeng,et al.Analysis and application of fracture propagated model by hydraulic fracturing in coal-bed methane reservoir[J].Journal of China Coal Society,2014,(10):2068-2074
[20] 张庆.增强型地热系统人工压裂机理研究及应用[D].吉林大学,2014. Zhang Qing.Study and application of artificial fracturing mechanism of enhanced geothermal systems[D].Jilin University,2014.
[21] 于子望.多相多组分THCM耦合过程机理研究及其应用[D].吉林大学,2013. Yu Ziwang.Research on multiphase-multi component THCM coupling mechanism and its application[D].Jilin University,2013.
[22] Olson J E.Sublinear scaling of fracture aperture versus length:An exception or the rule?[J].Journal of Geophysical Research Solid Earth,2003,108(B9):ETG 3-1.
[23] 周健,陈勉,金衍,等.裂缝性储层水力裂缝扩展机理试验研究[J].石油学报,2007,28(5):109-113. Zhou Jian,Chen Mian,Jin Yan,et al.Experimental study on propagation mechanism of hydraulic fracture in naturally fractured reservoir[J].Acta Petrolei Sinica,2007,28(5):109-113.
[24] Zhao H,Chen M.Extending behavior of hydraulic fracture when reaching formation interface[J].Journal of Petroleum Science & Engineering,2010,74(1):26-30.
[25] Li S,Tang D Z,Pan Z J,et al.Characterization of the stress sensitivity of pores for different rank coals by nuclear magnetic resonance[J].Fuel,2013,111:746-754.

TOUGH-FLAC^3D热流固耦合模拟煤储层水力压裂过程

Investigation of hydraulic fracturing process in coal reservoir by a coupled thermo-hydro-mechanical simulator TOUGH-FLAC^3D

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TOUGH-FLAC3D热流固耦合模拟煤储层水力压裂过程

Investigation of hydraulic fracturing process in coal reservoir by a coupled thermo-hydro-mechanical simulator TOUGH-FLAC3D

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TOUGH-FLAC^3D热流固耦合模拟煤储层水力压裂过程

Investigation of hydraulic fracturing process in coal reservoir by a coupled thermo-hydro-mechanical simulator TOUGH-FLAC^3D