天然气开发

页岩气藏水平井分段多簇压裂复杂裂缝产量模拟

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  • 1.西南石油大学石油与天然气工程学院,四川 成都 610500;2.西南石油大学油气藏地质及开发工程国家重点实验室,四川 成都 610500
胡永全(1964-),男,重庆璧山人,教授,主要从事油气田增产改造新理论与新技术研究. E-mail:stimswpi@163.com.

收稿日期: 2016-02-02

  修回日期: 2016-04-08

  网络出版日期: 2019-09-11

基金资助

国家自然科学基金重大项目“页岩气动态随机裂缝控制与无水压裂液研究”(编号:51490653);西南石油大学研究生创新基金“基于多尺度流动特征的页岩气缝网压裂产能模拟”(编号:CXJJ2015029)联合资助.

Production simulation of staged multi-cluster fractured horizontal#br# wells with complex hydraulic fracture in shale gas reservoirs

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  • 1.School of Petroleum & Natural Gas,Southwest Petroleum University,Chengdu 610500,China;
    2.State Key Laboratory of Reservoir Geology & Exploitation,Southeast Petroleum University, Chengdu 610500,China

Received date: 2016-02-02

  Revised date: 2016-04-08

  Online published: 2019-09-11

摘要

现有页岩储层压裂水平井产能预测模型均采用与实际不符的平面裂缝假设,压后产能预测不准确。针对页岩储层压裂裂缝非对称非平面的实际复杂形态,基于流体扩散理论和压降叠加原理,建立了气藏渗流和裂缝渗流模型,采用空间离散建立了产量计算模型,通过数值分析方法求解,对页岩气藏水平井分段多簇压裂复杂裂缝产量进行了模拟。结果表明:真实非平面复杂裂缝产量远高于理想平面裂缝产量;天然裂缝对非平面裂缝形态和产量具有重要影响;三簇同时延伸形成的裂缝,中间缝产量比外侧缝产量低,产量差距在生产初期较大,随着时间增加,差距减小。外侧裂缝对导流能力比中间缝敏感;随着裂缝导流能力的增加,产量增加,但并非线性关系,增加的幅度逐渐减小。

本文引用格式

胡永全, 蒲谢洋, 赵金洲, 杨文露 . 页岩气藏水平井分段多簇压裂复杂裂缝产量模拟[J]. 天然气地球科学, 2016 , 27(8) : 1367 -1373 . DOI: 10.11764/j.issn.1672-1926.2016.08.1367

Abstract

The existing productivity prediction models of fractured horizontal well for shale gas reservoir are based on the assumption of planar hydraulic fracture.However,the actual geometry of hydraulic fracture in shale reservoirs is complex.So the productivity prediction is not accurate.In view of the actual asymmetric non-planar complex fracture geometry in shale gas reservoir,a gas reservoir seepage model and a hydraulic fracture seepage model are established.A new productivity model is set up with the semi-analytical method.By numerical analysis way,we calculated the production of staged multi-cluster fractured horizontal well with complex hydraulic fracture.The results of production simulation indicate that the gas production from real non-planar fracture is much greater than the gas production from ideal planar fracture.Natural fractures have an enormous impact on the non-planar fracture geometry and well productivity.After three fractures extend at the same time,the production of middle one is smaller than the production of lateral ones,and production gap is larger at the beginning of production.With the increase of time,the production gap becomes smaller.The lateral fractures are more sensitive to fracture conductivity than the middle one.With the increase of fracture conductivity,the production of non-planar fractures increases.But it is not a linear relationship,the increasing amplitude decreases.

参考文献

[1]Zhao Jinzhou,Chen Xiyu,Liu Changyu,et al.The analysis of crack interaction in multi-stage horizontal fracturing[J].Natural Gas Geoscience,2015,26(3):533-538.[赵金洲,陈曦宇,刘长宇,等.水平井分段多簇压裂缝间干扰影响分析[J].天然气地球科学,2015,26(3):533-538.]
[2]Li Yongming,Wang Yanchen,Zhao Jinzhou,et al.Calculation model of kink angle in shale gas reservoirs with consideration of stree interference[J].Natural Gas Geoscience,2015,26(10):1979-1983,1998.[李勇明,王琰琛,赵金洲,等.考虑多裂缝应力干扰的页岩储层压裂转向角计算模型[J].天然气地球科学,2015,26(10):1979-1983,1998.]
[3]Warpinski N R,Kramm R C,Heinze J R,et al.Comparison of Single and Dual-array Micro-seismic Mapping Techniques in the Barnett Shale[R].SPE Annual Technical Conference and Exhibition,9-12 October,Dallas,Texas,USA.SPE95568,2005.
[4]Cipolla C L,Wallace J.Stimulated Reservoir Volume:A Misapplied Concept[R].SPE Hydraulic Fracturing Technology Conference,4-6 February,The Woodlands,Texas,USA.SPE168596.2014.
[5]Wu K,Olson J E.Mechanics Analysis of Interaction Between Hydraulic and Natural Fractures in Shale Reservoirs[R].SPE/AAPG/SEG Unconventional Resources Technology Conference,25-27 August,Denver,Colorado,USA.SPE 1922946.2014.
[6]Wu K,Olson J E.Investigation of the impact of fracture spacing and fluid properties for Interfering simultaneously or sequentially generated hydraulic fractures[J].SPE Production and Operation,2013,28(4):427-436.
[7]Wu K,Olson J E.Simultaneous multi-frac treatments:Fully coupled fluid flow and fracture mechanics for horizontal wells[J].SPE Journal,2013,20(2):337-346.
[8]Yu Wei,Zhang Tiantian,Du Song,et al.Numerical study of the effect of uneven proppant distribution between multiple fractures on shale gas well performance[J].Fuel,2015,141(2):189-198.
[9]Xu Jiancun,Guo Chaohua,Wei Mingzhen,et al.Production performance analysis for composite shale gas reservoir considering multiple transport mechanisms[J].Journal of Natural Gas Science and Engineering,2015,26(3):382-395.
[10]Li Longlong,Yao Jun,Li Yang,et al.Productivity calculation and distribution of staged multi-cluster fractured horizontal wells[J].Petroleum Exploration and Development,2014,41(4):457-461.[李龙龙,姚军,李阳,等.分段多簇压裂水平井产能计算及其分布规律[J].石油勘探与开发,2014,41(4):457-461.]
[11]Zeng Hui,Yao Jun,Fan Dongyan,et al.Analysis of influencing factors about multi-stage fractured horizontal well productivity in shale gas reservoir[J].Xinjiang Petroleum Geology,2014,35(3):324-328.[曾慧,姚军,樊冬艳,等.页岩气藏分段压裂水平井产能影响因素分析[J].新疆石油地质,2014,35(3):324-328.]
[12]Fan Dongyan,Yao Jun,Sun Hai,et al.Transient flow model of stage-fractured horizontal wells in shale gas reservoirs[J].Journal of China University of Petroleum,2014,38(5):116-123.[樊冬艳,姚军,孙海,等.页岩气藏分段压裂水平井不稳定渗流模型[J].中国石油大学学报:自然科学版,2014,38(5):116-123.]
[13]Xie Weiyang,Li Xiaoping.Steady productivity of horizontal well in hydraulic fracture induced shale gas reservoir[J].Natural Gas Geoscience,2012,23(2):387-392.[谢维扬,李晓平.水力压裂缝导流的页岩气藏水平井稳产能力研究[J].天然气地球科学,2012,23(2):387-392.]
[14]Xie Weiyang,Li Xiaoping,Zhang Liehui,et al.Transient production decline analysis for multi-fractured horizontal well in shale gas reservoirs[J].Natural Gas Geoscience,2015,26(2):384-390.[谢维扬,李晓平,张烈辉,等.页岩气多级压裂水平井不稳定产量递减探讨[J].天然气地球科学,2015,26(2):384-390.]
[15]Wu R,Kresse O,Weng X,et al.Modeling of Interaction of Hydraulic Fractures in Complex Fracture Networks[R].SPE Hydraulic Fracturing Technology Conference,6-8 February,The Woodlands,Texas,USA.SPE 152052.2012.
[16]Gringarten A C.The Use of Source and Green’s Functions in Solving Unsteady-flow Problems in Reservoirs[A].SPE 3818.1973.
[17][KG*5/6]Guo Jianchun,Liu Heng,Zeng Fanhui.Influence of varying fracture width on fractured wells long-term productivity[J].Journal of China University of Petroleum,2015,39(1):111-115.[郭建春,刘恒,曾凡辉.裂缝变缝宽形态对压裂井长期产能的影响[J].中国石油大学学报:自然科学版,2015,39(1):111-115.]
[18]Wu K.Numerical Modeling of Complex Hydraulic Fracture Development in Unconventional Reservoirs[D].USA:The University of Texas at Austin,2014.

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