孟凡坤;雷群;何东博;闫海军;徐伟;

• 1:中国石油勘探开发研究院

• 2:中国石油西南油气田分公司勘探开发研究院

摘要(Abstract)：

为解决高石梯—磨溪碳酸盐岩气藏应力敏感性强、斜井生产动态变化不明晰问题,开展岩石应力敏感性实验,分析渗透率变化规律并引入拟时间、拟压力函数描述,考虑孔、缝、洞发育及外边界封闭的储层特征,综合运用Laplace变换、Fourier变换及其反变换、点源函数叠加等方法,建立应力敏感各向异性碳酸盐岩气藏三重孔隙介质斜井渗流数学模型。应用Stehfest数值反演方法,结合气藏物质平衡方程,对模型进行求解;采用矿场实际储层、流体及生产数据,验证模型的有效性,分析应力敏感因数、井斜角与地层厚度等对生产动态的影响规律,绘制不同井斜角时地层厚度随井底流压变化关系图版。结果表明:储层应力敏感性越强,井底流压递减越快;井斜角越大,井底流压越高,但递减速率较为接近;地层厚度越大,井底流压递减速率越小,地层厚度与井斜角之间存在最佳匹配关系。该研究结果为矿场实际井斜角设计提供依据。

关键词(KeyWords)：碳酸盐岩气藏;三重孔隙介质;应力敏感;斜井;生产动态

Abstract:

Keywords:

基金项目(Foundation):国家科技重大专项(2016ZX05015-003);; 中国石油集团重大科技专项(2016E-06)

作者(Author):孟凡坤;雷群;何东博;闫海军;徐伟;

Email:

参考文献(References)：

• [1]王文之,杨跃明,张玺华,等.四川盆地震旦系灯影组储层特征及成因[J].东北石油大学学报,2016,40(2):1-10.Wang Wenzhi,Yang Yueming,Zhang Xihua,et al.Reservoir characteristics and genesis of the Sinian Dengying formation in Sichuan basin[J].Journal of Northeast Petroleum University,2016,40(2):1-10.

• [2]徐新丽.含微裂缝低渗储层应力敏感性及其对产能影响[J].特种油气藏,2015,22(1):127-130.Xu Xinli.Stress sensitivity of low-permeability reservoir containing micro-fracture and its influence on productivity[J].Special Oil&Gas Reservoirs,2015,22(1):127-130.

• [3]孟凡坤,雷群,闫海军,等.高石梯—磨溪碳酸盐岩气藏斜井产能评价[J].特种油气藏,2017,24(5):111-115.Meng Fankun,Lei Qun,Yan Haijun,et al.Deliverability evaluation for inclined well in Gaoshiti-Moxi carbonate gas reservoir[J].Special Oil&Gas Reservoirs,2017,24(5):111-115.

• [4]Cinco H,Miller F G.Unsteady-state pressure distribution created by a directionally drilled well[J].Journal of Petroleum Technology,1975,27(11):1392-1400.

• [5]Abbaszadeh M,Hegeman P S.Pressure-transient analysis for a slanted well in a reservoir with vertical pressure support[J].SPE Formation Evaluation,1990,5(3):277-284.

• [6]李巍,卢德唐,王磊,等.复杂边界斜井试井分析方法研究[J].油气井测试,2009,18(6):1-5.Li Wei,Lu Detang,Wang Lei,et al.A transient pressure solution for inclined wells with complex boundaries[J].Well Testing,2009,18(6):1-5.

• [7]王海静,仝兴华,薛世峰,等.板状油藏大斜度井流入动态[J].中国石油大学学报:自然科学版,2011,35(6):88-94.Wang Haijing,Tong Xinghua,Xu Shifeng,et al.Inflow performance of highly deviated well in slab reservoir[J].Journal of China University of Petroleum:Edition of Natural Sciences,2011,35(6):88-94.

• [8]Ozkan E,Raghavan R.New solutions for well-test analysis problems,part 1:Analytical considerations[J].SPE Formation Evaluation,1991,6(3):359-368.

• [9]Ozkan E,Raghavan R.New solutions for well-test-analysis problems,part 2:Computational considerations and applications[J].SPE Formation Evaluation,1991,6(3):369-378.

• [10]Ozkan E.New solutions for well-test-analysis problems:PartⅢ-additional algorithms[R]//SPE 69th Annual Technical Conference and Exhibition.Society of Petroleum Engineers,1994.

• [11]Ozkan E,Raghavan R.A computationally efficient,transient-pressure solution for inclined wells[J].SPE Reservoir Evaluation&Engineering,2000,3(5):414-425.

• [12]Wang Haitao,Zhang Liehui,Guo Jingjing,et al.An efficient algorithm to compute transient pressure responses of slanted wells with arbitrary inclination in reservoirs[J].Petroleum Science,2012,9(2):212-222.

• [13]廖新维.双重介质拟稳态油藏斜井试井模型研究[J].石油勘探与开发,1998,25(5):57-61.Liao Xinwei.Discussion of slanted well test model in dual-porosity reservoirs with pseudo steady state flow[J].Petroleum Exploration&Development,1998,25(5):57-61.

• [14]Khatteb H A,Yeh N S,Agarwal R G.Pressure transient behavior of slanted wells in single and multiple-layered systems[R]//SPE66th Annual Technical Conference and Exhibition.Society of Petroleum Engineers,1991.

• [15]杨志兴,杨明,刘海成,等.低渗变形介质油藏斜井试井及现场应用[J].科学技术与工程,2014,14(21):81-88.Yang Zhixing,Yang Ming,Liu Haicheng,et al.Deviated well test in low permeability reservoirs with deformational media[J].Science Technology and Engineering,2014,14(21):81-88.

• [16]Chin L Y,Raghavan R,Thomas L K.Fully coupled analysis of well responses in stress-sensitive reservoirs[J].SPE Reservoir Evaluation&Engineering,2000,3(5):435-443.

• [17]Raghavan R,Scorer J D T,Miller F G.An investigation by numerical methods of the effect of pressure-dependent rock and fluid properties on well flow tests[J].Society of Petroleum Engineers Journal,1972,12(3):267-275.

• [18]张磊,同登科,马晓丹.变形三重介质三渗模型的压力动态分析[J].工程力学,2008,25(10):103-109.Zhang Lei,Tong Dengke,Ma Xiaodan.Pressure dynamic analysis of triple permeability model in deformed triple porosity reservoirs[J].Engineering Mechanics,2008,25(10):103-109.

• [19]Kikani J,Pedrosa O A.Perturbation analysis of stress-sensitive reservoirs[J].SPE Formation Evaluation,1991,6(3):379-386.

• [20]王文环.应力敏感砂岩地层三区复合凝析气藏不稳定试井模型[J].石油勘探与开发,2005,32(3):117-119.Wang Wenhuan.Three-zone composite well test model of condensate gas reservoir in stress-sensitive sandstone[J].Petroleum Exploration&Development,2005,32(3):117-119.

• [21]宁正福,廖新维,高旺来,等.应力敏感裂缝性双区复合气藏压力动态特征[J].大庆石油学院学报,2004,28(2):34-36.Ning Zhengfu,Liao Xinwei,Gao Wanglai,et al.Pressure transient response in deep-seated geothermal stress-sensitive fissured composite gas reservoir[J].Journal of Daqing Petroleum Institute,2004,28(2):34-36.

• [22]任俊杰,郭平,汪周华.三重介质油藏斜井压力动态特征分析[J].水动力学研究与进展,2012,27(1):7-15.Ren Junjie,Guo Ping,Wang Zhouhua.Dynamical characteristics analysis of inclined well in triple medium reservoir[J].Chinese Journal of Hydrodynamics,2012,27(1):7-15.

• [23]Stehfest H.Algorithm 368:Numerical inversion of Laplace transforms[J].Communications of the ACM,1970,13(1):47-49.

• [24]Lee A,Gonzalez M,Eakin B.The viscosity of natural gases[J].Journal of Petroleum Technology,1966,18(8):997-1000.

• [25]Hall Kenneth R,Lyman Yarborough.A new equation of state for Z-factor calculations[J].Oil and Gas Journal,1973,71(7):82-92.

• [26]Dranchukp M,Purvisr A,Robinson D B.Computer calculation of natural gas compressibility factors using the Standing and Katz correlation[M].Edmonton:Petroleum Society of Canada,1973.

• [27]李士伦.天然气工程[M].北京:石油工业出版社,2008:112-127.Li Shilun.Natural gas engineering[M].Beijing:Petroleum Industry Press,2008:112-127.

• [28]李纪,李晓平.不同井型下气井产能对比研究与评价[J].特种油气藏,2016,23(2):108-111.Li Ji,Li Xiaoping.Productivity comparison and evaluation of gas wells with different well-types[J].Special Oil&Gas Reservoirs,2016,23(2):108-111.