Establishment and Application of Pressure Drive Dynamic Fracture Model for Tight Oil Reservoirs

doi:10.3969/j.issn.1006-6535.2023.04.011

Abstract

Abstract: To address the problem that conventional reservoir numerical simulation software cannot accurately simulate the fracture propagation during the development of pressure drive water injection of tight oil; based on the dynamic fracture propagation law during the development of pressure drive, the fracture propagation model is organically coupled with the oil-water two-phase seepage model of tight oil reservoir, a pressure drive water injection model was established, and the problem was solved by the finite difference method. The model was applied to the five-point injection and recovery well network of Well Cluster X8 in an oilfield to study the production dynamic characteristics of pressure drive development under high-speed constant displacement and step increasing displacement. The result shows that the injection displacement is positively correlated with the fracture propagation velocity; under the same injection displacement, the fracture propagation speed in the near-wellbore zone of the water injection well is faster; dynamic fracture made the pressure and injected water propagate along the fracture propagation direction; in a five-spot pattern well network with a cumulative injection volume of 3×10⁴m³, compared with the step increasing displacement with high-speed constant displacement method, the fracture propagation length is increased by 11.9 m, and the oil-water front edge migration lags by 4.2 m; corresponding to corner wells, the effective time was 5 days later, the water breakthrough time was 31 days later, and the staged recovery degree was 0.45 percentage points higher; the step increasing displacement pressure drive method improved the affecting area of the injected water, delayed the water breakthrough time of the production well, and improved the development effects of the reservoir. The research results can provide technical support for pressure drive development water injection design of tight reservoirs.

Key words: tight reservoir, pressure drive, fracture propagation, numerical simulation

CLC Number:

TE349

Cui Chuanzhi, Wang Junkang, Wu Zhongwei, Sui Yingfei, Li Jing, Lu Shuiqingshan. Establishment and Application of Pressure Drive Dynamic Fracture Model for Tight Oil Reservoirs[J]. Special Oil & Gas Reservoirs, 2023, 30(4): 87-95.

References

[1] 徐永辉,孟阳,石世革.低渗透油藏压驱注水量设计方法[J].内蒙古石油化工,2021,47(11):118-121.
XU Yonghui,MENG Yang,SHI Shige.Design method of water injection rate for high-pressure water injection in low permeability reservoirs[J].Inner Mongolia Petrochemical Industry,2021,47(11):118-121.
[2] 王锋.压驱工艺优化及现场应用[J].石化技术,2022,29(4):10-11.
WANG Feng.Optimization of pressure drive technology and its field application[J].Petrochemical Industry Technology,2022,29(4):10-11.
[3] 高建东.牛35区块压驱注水方案设计及应用[J].内江科技,2022,43(4):28-29.
GAO Jiandong.Design and application of pressure drive water injection scheme in NIU 35 Block[J].Neijiang Science & Technology,2022,43(4):28-29.
[4] 樊超,李三山,李璐,等.低渗透油藏压驱注水开发技术研究[J].石油化工应用,2022,41(1):37-40.
FAN Chao,LI Sanshan,LI Lu,et al.Research on high-pressure water injection in low-permeability reservoirs[J].Petrochemical Industry Application,2022,41(1):37-40.
[5] 黄越,金智荣,乔春国,等.江苏油田小断块低渗油藏压驱注水技术实践[J].石油化工应用,2022,41(6):48-51.
HUANG Yue,JIN Zhirong,QIAO Chunguo,et al.Practice of pressure drive water injection technology in small fault block reservoir of low permeability in Jiangsu Oilfield[J].Petrochemical Industry Application,2022,41(6):48-51.
[6] 李瑞轩,黄云龙,李源.油藏渗流模型与数值模拟技术研究进展[J].石油化工应用,2021,40(7):11-15,29.
LI Ruixuan,HUANG Yunlong,LI Yuan.Research progress of reservoir seepage model and numerical simulation technology[J].Petrochemical Industry Application,2021,40(7):11-15,29.
[7] 杨凯,郭肖.裂缝性低渗透油藏三维两相黑油数值模拟研究[J].岩性油气藏,2009,21(3):118-121.
YANG Kai,GUO Xiao.Numerical simulation study of three-dimensional two-phase black oil model in fractured low permeability reservoirs[J].Lithologic Reservoirs,2009,21(3):118-121.
[8] 范天一,宋新民,吴淑红,等.低渗透油藏水驱动态裂缝数学模型及数值模拟[J].石油勘探与开发,2015,42(4):496-501.
FAN Tianyi,SONG Xinmin,WU Shuhong,et al.A mathematical model and numerical simulation of waterflood induced dynamic fractures of low permeability reservoirs[J].Petroleum Exploration and Development,2015,42(4):496-501.
[9] 彭缓缓,王文环,吕文峰,等.考虑动态裂缝的特低渗透油藏渗流模型[J].断块油气田,2016,23(5):630-633.
PENG Huanhuan,WANG Wenhuan,LYU Wenfeng,et al.Seepage model of ultra-low permeability reservoir considering dynamic fracture[J].Fault-Block Oil & Gas Field,2016,23(5):630-633.
[10] 吴效运,李晓文,刘方方.深层特低渗油藏压驱开发技术机理及应用研究[J].内蒙古石油化工,2021,47(10):66-69.
WU Xiaoyun,LI Xiaowen,LIU Fangfang.Mechanism of pressure flooding development technology in deep ultra-low permeability reservoir and its application research[J].Inner Mongolia Petrochemical Industry,2021,47(10):66-69.
[11] 李淑霞,古建伟.油藏数值模拟基础[M].东营:中国石油大学出版社,2009:156-176 .
LI Shuxia,GU Jianwei.Fundamentals of numerical reservoir simulation[M].Dongying:China University of Petroleum Press,2009:156-176.
[12] 郭永存,卢德唐,曾清红,等.有启动压力梯度渗流的数学模型[J].中国科学技术大学学报,2005,41(4):492-498.
GUO Yongcun,LU Detang,ZENG Qinghong,et al.Mathematical model of fluid flow in porous media related to start-up pressure gradients[J].Journal of University of Science and Technology of China,2005,41(4):492-498.
[13] 李松泉,程林松,李秀生,等.特低渗透油藏非线性渗流模型[J].石油勘探与开发,2008,35(5):606-612.
LI Songquan,CHENG Linsong,LI Xiusheng,et al.Non-linear seepage flow models of ultra-low permeability reservoirs[J].Petroleum Exploration and Development,2008,35(5):606-612.
[14] 何逸凡,石洪福,刘英宪.基于启动压力梯度等效表征的低渗透油藏数值模拟[J].断块油气田,2017,24(4):510-513.
HE Yifan,SHI Hongfu,LIU Yingxian.Numerical simulation of low-permeability oil reservoir based on equivalent characterization of start-up pressure gradient[J].Fault-Block Oil & Gas Field,2017,24(4):510-513.
[15] 尹芝林,孙文静,姚军.动态渗透率三维油水两相低渗透油藏数值模拟[J].石油学报,2011,32(1):117-121.
YIN Zhilin,SUN Wenjing,YAO Jun.Numerical simulation of the 3D oil-water phase dynamic permeability for low-permeability reservoirs[J].Acta Petrolei Sinica,2011,32(1):117-121.
[16] 李荣强,李阳,王建忠.低渗透油藏数值模拟中内边界条件的处理[J].油气地质与采收率,2013,20(3):72-75,116.
LI Rongqiang,LI Yang,WANG Jianzhong.Inner boundary conditions of numerical simulation for low-permeability reservoirs[J].Petroleum Geology and Recovery Efficiency,2013,20(3):72-75,116.
[17] 刘翠玲,王欣,马志国,等.石油水力压裂裂缝延展的可视化仿真[J].计算机仿真,2008,25(7):244-246,256.
LIU Cuiling,WANG Xin,MA Zhiguo,et al.Visual simulation of hydraulic fracturing treatment[J].Computer Simulation,2008,25(7):244-246,256.
[18] CAO Nai,LEI Gang,DONG Pingchuan,et al.Stress-dependent permeability of fractures in tight reservoirs[J].Energies,2018,12(1):117.
[19] 焦春艳,何顺利,谢全,等.超低渗透砂岩储层应力敏感性实验[J].石油学报,2011,32(3):489-494.
JIAO Chunyan,HE Shunli,XIE Quan,et al.An experimental study on stress-dependent sensitivity of ultra-low permeability sandstone reservoirs[J].Acta Petrolei Sinica,2011,32(3):489-494.
[20] 张睿,宁正福,杨峰,等.页岩应力敏感实验与机理[J].石油学报,2015,36(2):224-231,237.
ZHANG Rui,NING Zhengfu,YANG Feng,et al.Shale stress sensitivity experiment and mechanism[J].Acta Petrolei Sinica,2015,36(2):224-231,237.
[21] ZHANG Tiantian, LI Zhiping,ADENUTSI Caspar Daniel,et al.A new model for calculating permeability of natural fractures in dual-porosity reservoir[J].Advances in Geo-Energy Research, 2017,1(2):86-92.
[22] 袁士义,宋新民,冉启全.裂缝性油藏开发技术[M].北京:石油工业出版社,2004:193.
YUAN Shiyi,SONG Xinmin,RAN Qiquan.Development technology of fractured reservoirs[M].Beijing:Petroleum Industry Press,2004:193.
[23] 张翼飞,杨勇,孙志刚,等.低渗透油藏压驱物理模拟与裂缝定量表征[J].油气地质与采收率,2022,29(4):143-149.
ZHANG Yifei,YANG Yong,SUN Zhigang,et al.Physical simulation of fracturing-flooding and quantitative characterization of fractures in low-permeability oil reservoirs[J].Petroleum Geology and Recovery Efficiency,2022,29(4):143-149.
[24] 阚洪阁,张昆,狄翔,等.延113—延133井区山23致密砂岩无阻流量预测[J].非常规油气,2022,9(2):100-105.
KAN Hongge,ZHANG Kun,DI Xiang,et al.Absolute open flow prediction of Shan23 tight sandstone in Yan113-Yan133 Well Block[J].Unconventional Oil & Gas,2022,9(2):100-105.
[25] 李俊飞,刘小鸿,叶小明,等.渤海湾盆地LD油田砂砾岩储层裂缝表征研究[J].长江大学学报(自然科学版),2021,18 (5):23-29.
LI Junfei,LIU Xiaohong,YE Xiaoming,et al. Study on fracture characterization of sand-conglomerate reservoir in LD Oilfield of Bohai Bay Basin[J]. Journal of Yangtze University (Natural Science Edition),2021,18(5):23-29.
[26] 董敏,郭伟, 张林炎,等.川南泸州地区五峰组—龙马溪组古构造应力场及裂缝特征[J].岩性油气藏,2022,34(1):43-51.
DONG Min,GUO Wei,ZHANG Linyan,et al. Characteristics of paleotectonic stress field and fractures of Wufeng-Longmaxi Formation in Luzhou Area, southern Sichuan Basin.[J] Lithologic Reservoirs,2022,34(1):43-51.
[27] 吴进波,陈鸣,许巍,等.致密裂缝储层双侧向测井侵入响应数值模型[J].非常规油气,2022,9(4):32-36.
WU Jinbo,CHEN Ming,XU Wei,et al.Numerical model of dual laterolog intrusion response in tight fractured reservoir[J].Unconventional Oil & Gas,2022,9(4):32-36.
[28] 郑华,康凯,刘卫林,等.渤海深层变质岩潜山油藏裂缝主控因素及预测[J].岩性油气藏,2022,34(3):29-38.
ZHENG Hua,KANG Kai,LIU Weilin,et al. Main controlling factors and prediction of fractures in deep metamorphic buried hill reservoirs in Bohai Sea[J]. Lithologic Reservoirs,2022,34(3):29-38.
[29] 潘冠昌,杨斌,张浩,等.超深层碳酸盐岩裂缝面形态与摩擦因数研究[J].断块油气田,2022,29(6):794-799.
PAN Guanchang,YANG Bin,ZHANG Hao,et al.Research on fracture surface morphology and friction coefficient of ultra-deep carbonate rock[J].Fault-Block Oil & Gas Field,2022,29(6):794-799.