Lithologic Reservoirs ›› 2025, Vol. 37 ›› Issue (3): 194-200.doi: 10.12108/yxyqc.20250318

• PETROLEUM ENGINEERING AND OIL & GAS FIELD DEVELOPMENT • Previous Articles    

Numerical well testing model of fractured well with complex fractures multi-well interference in heterogeneous tight gas reservoirs

XU Youjie1,2, REN Zongxiao1, XIANG Zuping3, FAN Xiaohui4, YU Mengnan5   

  1. 1. The key laboratory of well stability and fluid & rock mechanics in Oil and gas reservoir of Shaanxi Province, Xi'an Shiyou University, xi'an 710065, China;
    2. Unconventional Oil and Gas Development Research Institute, Chongqing University of Science and Technology, Chongqing 401331, China;
    3. School of Petroleum engineering, Chongqing University of Science and Technology, Chongqing 401331, China;
    4. Exploration and Development Research Institute, China Petroleum Changqing Oilfield Branch, Xi'an 710018, China;
    5. Exploration and Development Research Institute, China Petroleum Liaohe Oilfield Branchm, Panjing 124000, Liaoning, China
  • Received:2024-03-04 Revised:2024-06-24 Published:2025-05-10

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Abstract: Based on Embedded discrete crack，a numerical well testing mathematical model of complex fractures and multi well interference in heterogeneous tight gas reservoirs is established，which considers the influence of the threshold pressure gradient to the permeability calculation formula. It improved the algorithm for numerical simulation based on the Multiphase Reservoir Simulator（MRST）. The results show that：（1）Based on the MRST simulator for model calculation，the accuracy of the simplified model was verified by comparing the result with commercial software. The larger the threshold pressure gradient coefficient，the greater the upward curve of the pressure drop and pressure drop derivative curve.（2）The production type of adjacent wells（constant rate or constant pressure）mainly affects the mid to late stage characteristics of the wellbore pressure drop log-log curve. The constant rate production of adjacent wells leads the boundary reflection characteristics appears in advance， while the constant pressure production of adjacent wells causes the late-stage log-log curve of the test well to show an upward trend followed by a downward trend.（3）The influence of adjacent well fracture parameters and discrete fractures on the wellbore pressure drop curve of the test well is relatively small. The induced fracture conductivity of the test well shows a significant depression of bilinear flow stage wellbore pressure drop derivative curves.（4）When the region permeability of the test well keep constant，the higher the permeability of the adjacent well is，the earlier the interference appears during late stage. The research results give a theoretical foundation for the analysis of multiple well interference well test of fractured wells in tight gas reservoirs.

Key words: heterogeneous tight gas reservoir, pseudo threshold pressure gradient, fractured well, inter-well interference, numerical well testing, nonlinear seepage, numerical simulation based on MRST

CLC Number: 

  • TE312
[1] 贾爱林,位云生,郭智,等. 中国致密砂岩气开发现状与前景展望[J]. 天然气工业,2022,42(1):83-92. JIA Ailing,WEI Yunsheng,GUO Zhi,et al. Development status and prospect of tight sandstone gas in China[J]. Natural Gas Industry,2022,42(1):83-92.
[2] 高计县,孙文举,吴鹏,等. 鄂尔多斯盆地东北缘神府区块上古生界致密砂岩成藏特征[J]. 岩性油气藏. 2021,33(1):121-130.GAO Jixian,SUN Wenju,WU Peng,et al. Accumulation characteristics of Upper Paleozoic tight sandstone in Shenfu block, northeastern margin of Ordos Basin[J]. Lithologic Reservoirs, 2021,33(1):121-130.
[3] 唐大海,谭秀成,王小娟,等. 四川盆地须家河组致密气藏成藏要素及有利区带评价[J]. 特种油气藏,2020,27(3):40-46. TANG Dahai,TAN Xiucheng,WANG Xiaojuan,et al. Tight gas accumulation elements and favorable zone evaluation of Xujiahe Formation in Sichuan Basin[J]. Special Oil & Gas Reservoirs,2020,27(3):40-46.
[4] 王小娟,陈双玲,谢继容,等. 川西南地区侏罗系沙溪庙组致密砂岩成藏特征及主控因素[J]. 岩性油气藏,2024,36(1):78-87. WANG Xiaojuan,CEHN Shuangling,XIE Jirong,et al. Accumulation characteristics and main controlling factors of tight sandstone of Jurassic Shaximiao Formation in southwestern Sichuan Basin[J]. Lithologic Reservoirs,2024,36(1):78-87.
[5] ARTUN E,KULGA B. Selection of candidate wells for refracturing in tight gas sand reservoirs using fuzzy inference[J]. Petroleum Exploration and Development,2020,47(2):383-389.
[6] 崔静,高东伟,毕文韬,等. 页岩气井重复压裂选井评价模型研究及应用[J]. 岩性油气藏,2018,30(6):145-150. CUI Jing,GAO Dongwei,BI Wentao,et al. Refracturing selection evaluation model for shale gas wells and its application[J]. Lithologic Reservoirs,2018,30(6):145-150.
[7] 姜瑞忠,李林凯,彭元怀,等. 基于低速非线性渗流新模型的垂直压裂井产能计算[J]. 油气地质与采收率,2013,20(1):92-95. JIANG Ruizhong,LI Linkai,PENG Yuanhuai,et al. Vertical fracture well productivity analysis based on low velocity nonlinear new model[J]. Petroleum Geology and Recovery Efficiency, 2013,20(1):92-95.
[8] CHEN Zhiming,LIAO Xinwei,YU Wei,et al. Pressure transient behaviors of wells in fractured reservoirs with natural-and hydraulicfracture networks[J]. SPE Journal,2019,24(1):375-394.
[9] JIA Pin,CHENG Lingsong,CLARKSON C. Flow behavior analysis of two-phase flowback and early-time production from hydraulically-fractured shale gas wells using a hybrid numerical/analytical model[J]. International Journal of Coal Geology, 2017,182:14-31.
[10] 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.
[11] 徐有杰,刘启国,王瑞,等. 复合油藏压裂水平井复杂裂缝分布压力动态特征[J]. 岩性油气藏,2019,31(5):161-168. XU Youjie,LIU Qiguo,WANG Rui,et al. Pressure transient of fractured horizontal well with complex fracture distribution in composite reservoir[J]. Lithologic Reservoirs,2019,31(5):161-168.
[12] XU Jianchun,CHEN Bailian,SUN Baojiang,et al. Flow behavior of hydraulic fractured tight formations considering Pre-Darcy flow using EDFM[J]. Fuel,2019,241:1145-1163.
[13] WANG Yuhang,SHAHVALI M. Discrete fracture modeling using Centroidal Voronoi grid for simulation of shale gas plays with coupled nonlinear physics[J]. Fuel,2016,163:65-73.
[14] LIU Hui,ZHAO Xiaoliang,TANG Xuefeng,et al. A Discrete fracture-matrix model for pressure transient analysis in multistage fractured horizontal wells with discretely distributed natural fractures[J]. Journal of Petroleum Science and Engineering, 2020,192:107275.
[15] 陈志明,张绍琦,周彪,等. 考虑离散裂缝的非均质裂缝性气藏数值试井新模型[J]. 天然气工业,2023,43(2):77-86. CHEN Zhiming,ZHANG Shaoqi,ZHOU Biao,et al. A new numerical well testing model considering discrete fractures for heterogeneous fractured gas reservoirs[J]. Natural Gas Industry,2023,43(2):77-86.
[16] 钟会影,沈文霞,藏秋缘,等. 基于PEBI网格的考虑诱导裂缝的聚合物驱压力动态研究[J]. 岩性油气藏,2022,34(3):164-170. ZHONG Huiying,SHEN Wenxia,ZANG Qiuyuan,et al. Pressure transient of polymer flooding considering induced fractures based on PEBI grid[J]. Lithologic Reservoirs,2022,34(3):164-170.
[17] 孙贺东,欧阳伟平,朱松柏,等. 多尺度离散裂缝性致密砂岩气藏数值试井新方法:以塔里木盆地克拉苏气田为例[J]. 天然气工业,2022,42(7):55-64. SUN Hedong,OUYANG Weiping,ZHU Songbo,et al. A new numerical well test method of multi-scale discrete fractured tight sandstone gas reservoirs and its application in the Kelasu Gas Field of the Tarim Basin[J]. Natural Gas Industry,2022, 42(7):55-64.
[18] 李继庆,刘曰武,黄灿,等. 页岩气水平井试井模型及井间干扰特征[J]. 岩性油气藏,2018,30(6):138-144. LI Jiqing,LIU Yuewu,HUANG Can,et al. Multi-stage fracturing horizontal well interference test model and its application[J]. Lithologic Reservoirs,2018,30(6):138-144.
[19] LI Daolun,ZHA Wenshu,LIU Shufeng,et al. Pressure transient analysis of low permeability reservoir with pseudo threshold pressure gradient[J]. Journal of Petroleum Science and Engineering,2016,147:308-316.
[20] 闫正和,郭康良,李彦平,等. 海上干扰试井数值模拟设计及方案优化[J]. 岩性油气藏,2015,27(2):98-102. YAN Zhenghe,GUO Kangliang,LI Yanping,et al. Interference well test with numerical simulation design and program optimization at sea[J]. Lithologic Reservoirs,2015,27(2):98-102.
[21] GUPTA I,RAI C,DEVEGOWDA D,et al. Fracture hits in unconventional reservoirs:A critical review[J]. SPE Journal,2021, 26(1):412-434.
[22] CHEN Zhiming,XIE Jianyong,LIAO Xinwei,et al. A semianalytical model for complex fracture geometries with fracture hits[R]. Beijing,presented at International Petroleum Technology Conference,2019.
[23] XIAO Cong,DAI Yu,TIAN Leng,et al. A semianalytical methodology for pressure-transient analysis of multiwell-padproduction scheme in shale gas reservoirs,part 1:New insights into flow regimes and multiwell interference[J]. SPE Journal, 2017,23(3):885-905.
[24] 姜瑞忠,高岳,崔永正,等. 基于应力敏感效应和启动压力梯度的双重介质低渗油藏邻井干扰试井模型[J]. 东北石油大学学报,2020,44(1):112-120. JIANG Ruizhong,GAO Yue,CUI Yongzheng,et al. Well test model of interference from adjacent well in dual medium low permeability reservoir considering stress sensitive effect and threshold pressure gradient[J]. Journal of Northeast Petroleum University,2020,44(1):112-120.
[25] 李传亮. 再谈启动压力梯度[J]. 岩性油气藏,2013,25(4):1-5. LI Chuanliang. Another discussion on starting pressure gradient[J]. Lithologic Reservoirs,2013,25(4):1-5.
[26] 姜瑞忠,李林凯,徐建春,等. 低渗透油藏非线性渗流新模型及试井分析[J]. 石油学报,2012,33(2):264-268. JIANG Ruizhong,LI Linkai,XU Jianchun,et al. A nonlinear mathematical model for low permeability reservoirs and weltesting analysis[J]. Acta Petrolei Sinica,2012,33(2):264-268.
[27] LI Linkai,Guo Xiao,Zhou Ming,et al. Numerical modeling of fluid flow in tight oil reservoirs considering complex fracturing networks and Pre-Darcy flow[J]. Journal of Petroleum Science and Engineering,2021,207:109050.
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