王海涛;彭倩;张烈辉;郭晶晶;聂权;

• 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:西南油气田公司蜀南气矿

摘要(Abstract)：

对于缝网改造的近井地带出现的非达西效应,在综合考虑页岩气解吸、扩散、非达西渗流(内区)和达西渗流(外区)基础上,建立多重机制作用下的复合页岩气藏不稳定试井模型,利用Laplace变换与分数阶虚宗量贝塞尔函数等方法对模型进行求解,利用Stehfest数值反演编程绘制井底压力动态曲线,对渗流指数、内区半径、内外区流度比、储容比、扩散系数、Langmuir吸附体积等参数进行敏感性分析。结果表明:流体在储层中的渗流可以划分为纯井筒储集影响阶段、过渡阶段、内区径向流阶段、内区径向流向外区径向流的过渡阶段、外区径向流阶段5个阶段。渗流指数越大,过渡段和内区径向流段压力及压力导数曲线位置越低;内区半径越大,内区非达西渗流段持续时间越长;内外区流度比越大,外区径向流段压力导数曲线抬升幅度越大;储容比越大,内外区过渡段后期出现的小"驼峰"的峰值越大;扩散系数越大,外区径向流段压力导数曲线位置越低;Langmuir吸附体积越大,内外区过渡段后期出现的小"驼峰"位置越低。该结果可应用于页岩气井的试井解释。

关键词(KeyWords)：复合页岩气藏;非达西渗流;吸附—解吸;扩散;试井;缝网改造

Abstract:

Keywords:

基金项目(Foundation):国家自然科学基金面上项目(51774243);国家自然科学基金青年科学基金项目(51404206);; 国家科技重大专项(2016ZX05062-002-004)

作者(Author):王海涛;彭倩;张烈辉;郭晶晶;聂权;

Email:

参考文献(References)：

• [1]邱振,邹才能,李建忠,等.非常规油气资源评价进展与未来展望[J].天然气地球科学,2013,24(2):238-246.Qiu Zhen,Zou Caineng,Li Jianzhong,et al.Unconventional petroleum resources assessment:Progress and future prospects[J].Natural Gas Geoscience,2013,24(2):238-246.

• [2]闫存章,黄玉珍,葛春梅,等.页岩气是潜力巨大的非常规天然气资源[J].天然气工业,2009,29(5):1-6.Yan Cunzhang,Huang Yuzhen,Ge Chunmei,et al.Shale gas:Enormous potential of unconventional natural gas resources[J].Natural Gas Industry,2009,29(5):1-6.

• [3]王公昌,姜瑞忠,徐建春.当前页岩气资源开发的瓶颈及建议[J].复杂油气藏,2012,5(2):10-14.Wang Gongchang,Jiang Ruizhong,Xu Jianchun.Analysis and advice for shale gas development[J].Complex Hydrocarbon Reservoirs,2012,5(2):10-14.

• [4]江怀友,鞠斌山,李治平,等.世界页岩气资源现状研究[J].中外能源,2014,19(3):14-22.Jiang Huaiyou,Ju Binshan,Li Zhiping,et al.A study on the world's shale gas resources today[J].Sino-Global Energy,2014,19(3):14-22.

• [5]王世谦.页岩气资源开采现状、问题与前景[J].天然气工业,2017,37(6):115-130.Wang Shiqian.Shale gas exploitation:Status,issues and prospects[J].Natural Gas Industry,2017,37(6):115-130.

• [6]曹园.页岩气资源开发的经济性评价[J].科技和产业,2017,17(4):73-75.Cao Yuan.Economic analysis of shale gas development[J].Science Technology and Industry,2017,17(4):73-75.

• [7]王伟锋,刘鹏,陈晨,等.页岩气成藏理论及资源评价方法[J].天然气地球科学,2013,24(3):429-438.Wang Weifeng,Liu Peng,Chen Chen,et al.The study of shale gas reservoir theory and resources evaluation[J].Natural Gas Geoscience,2013,24(3):429-438.

• [8]魏明强,段永刚,方全堂,等.页岩气藏孔渗结构特征和渗流机理研究现状[J].油气藏评价与开发,2011,1(4):73-77.Wei Mingqiang,DuanYonggang,Fang Quantang,et al.Current research situation of porosity&permeability characteristics and seepage mechanism of shale gas reservoir[J].Reservoir Evaluation and Development,2011,1(4):73-77.

• [9]李智锋,李治平,苗丽丽,等.页岩气藏纳米孔隙气体渗流特征分析[J].天然气地球科学,2013,24(5):1042-1047.Li Zhifeng,Li Zhiping,Miao Lili,et al.Gas flow characteristics in nano-scale pores of shale gas[J].Natural Gas Geoscience,2013,24(5):1042-1047.

• [10]段永刚,李建秋.页岩气无限导流压裂井压力动态分析[J].天然气工业,2010,30(3):26-29.Duan Yonggang,Li Jianqiu.Transient pressure analysis of infinite conductivity fractured wells for shale gas[J].Natural Gas Industry,2010,30(3):26-29.

• [11]Guo J J,Wang Haitao,Zhang Liehui.Transient pressure and production dynamics of multi-stage fractured horizontal wells in shale gas reservoirs with stimulated reservoir volume[J].Journal of Natural Gas Science and Engineering,2016,35,425-443.

• [12]Wang H T.Performance of multiple fractured horizontal wells in shale gas reservoirs with consideration of multiple mechanisms[J].Journal of Hydrology,2014(510):299-312.

• [13]Zhao Y L,Zhang L H,Luo J X.Performance of fractured horizontal well with stimulated reservoir volume in unconventional gas reservoir[J].Journal of Hydrology,2014(512):447-456.

• [14]Ozkan E,Brown M L,Raghavan R,et al.Comparison of fractured horizontal well performance in tight sand and shale reservoirs[J].SPE Reservoir Evaluation&Engineering,2011,14(2):248-259.

• [15]Zeng Jie,Wang Xiangzeng,Guo Jianchun,et al.Composite linear flow model for multi-fractured horizontal wells in heterogeneous shale reservoir[J].Journal of Natural Gas Science and Engineering,2017,38:527-548.

• [16]姜瑞忠,滕文超,乔欣,等.复合页岩气藏压裂水平井压力动态分析[J].天然气地球科学,2015,26(12):2336-2342.Jiang Ruizhong,Teng Wenchao,Qiao Xin,et al.Pressure transient analysis of fractured horizontal well in composite shale gas reservoir[J].Natural Gas Geoscience,2015,26(12):2336-2342.

• [17]Forchheimer P.Wasserbewegung durch Boden[J].Zeitschrift Verein Deutscher Ingenieure,1901,45(5):1782-1788.

• [18]Wen Z,Huang G H,Zhan H B.Non-Dareian flow toward a finite-diameter vertical well in a confined aquifer[J].Pedosphere,2008,18(3):288-303.

• [19]Ikoku C U,Ramey H J Jr.Transient flow of non-Newtonian power-law fluids in porous media[J].SPE Journal,1979,19(3):164-174.

• [20]廖新维,沈平平.现代试井分析[M].北京:石油工业出版社,2002:150-154.Liao Xinwei,Shen Pingping.Modern well test analysis[M].Beijing:Petroleum Industry Press,2002:150-154.

• [21]Van-Everdingen A F,Hust W.The skin effect and its influence on the productive capacity of a well[J].Journal of Petroleum Technology,1949,1(12):305-324.

• [22]Kucuk F,Ayestaran L.Analysis of simultaneously measured pressure and sand face flow rate in transient well testing(includes associated papers 13937and 14693)[J].Journal of Petroleum Technology,1985,37(2):323-334.

• [23]付春权,张波,姜英军,等.压力恢复试井理论曲线的特征[J].大庆石油学院学报,1998,22(4):30-33.Fu Chunquan,Zhang Bo,Jiang Yingjun,et al.Characteristics build up curve in well testing theory[J].Journal of Daqing Petroleum Institute,1998,22(4):30-33.

• [24]吕秀凤,刘振宇,张瞳阳.数值试井分析的有限元法[J].大庆石油学院学报,2005,29(5):12-15.Lyu Xiufeng,Liu Zhenyu,Zhang Tongyang.Finite element method of the numerical well test analysis[J].Journal of Daqing Petroleum Institute,2005,29(5):12-15.

• [25]方晓春,蒋鑫,刘启国,等.高含硫气藏两区复合地层试井解释方法研究[J].重庆科技学院学报:自然科学版,2013,15(5):36-39.Fang Xiaochun,Jiang Xin,Liu Qiguo,et al.Well test analysis method study of high sulfur two-block composite gas reservoir[J].Journal of Chongqing University of Science and Technology:Natural Sciences Edition,2013,15(5):36-39.