Traditional reservoir numerical simulation software just only consider the static fractures but cannot simulate the impact of fracture expansion on well network development during long-term water injection, and the simulation results are poorly fitted to the actual production dynamic data. To address this problem, a characterization method for complex dynamic fracture networks is developed based on the embedded discrete fracture model (EDFM) with dynamic improvement of pre-processing algorithms. The study shows that an efficient waterflood-induced fracture simulation method is established by coupling cross-fracture discrimination criteria, which can efficiently simulate the dynamic changes of fractures during reservoir injection and development and reflect the influence of natural fractures on the main fracture propagation path; the results are consistent compared with Abaqus software, while the computational efficiency is higher. The application example shows that the method has good adaptability for numerical simulation of waterflood-induced fractures, can accurately achieve the fitting of the water cut rising rules of the field water injection well cluster, which and has good reference significance for production dynamic analysis of ultra-low permeability reservoirs and later well pattern adjustment.
Cheng Linsong
,
Yang Chenxu
,
Cao Renyi
,
Jia Pin
,
Pu Baobiao
,
Shi Junjie
. Dynamic Characteristics and Numerical Simulation Research of Waterflood-induced Fractures[J]. Special Oil & Gas Reservoirs, 2023
, 30(5)
: 84
-90
.
DOI: 10.3969/j.issn.1006-6535.2023.05.011
[1] 何强,李凤霞,史爱萍,等.基于三维CT重构的油页岩复杂水力裂缝网络分形表征[J].油气地质与采收率,2021,28(5):116-123.
HE Qiang,LI Fengxia,SHI Aiping,et al.Fractal characterization of complex hydraulic fracture networks of oil shale via 3D CT reconstruction[J].Petroleum Geology and Recovery Efficiency,2021,28(5):116-123.
[2] WANG Y,CHENG S Q,FENG N C.et al.Semi-analytical modeling for water injection well in tight reservoir considering the variation of waterflood-induced fracture properties:case studies in Changqing Oilfield,China[J].Journal of Petroleum Science and Engineering,2017,159(5):740-753.
[3] 曾联波,赵向原,朱圣举,等.低渗透油藏注水诱导裂缝及其开发意义[J].石油科学通报, 2017,2(3):336-343.
ZENG Lianbo,ZHAO Xiangyuan,ZHU Shengju,et al.Waterflood-induced fractures and its significance for development of low-permeability sandstone oil reservoirs[J].Petroleum Science Bulletin,2017,2(3):336-343.
[4] 赵思远,贾自力,吴长辉,等.低渗透油藏注水诱发裂缝实验研究——以鄂尔多斯盆地吴起吴仓堡长9油藏为例[J].非常规油气,2021,8(3):73-79,89.
ZHAO Siyuan,JIA Zili,WU Changhui,et al.Experimental study on waterflood induced fractures simulation in low permeability reservoir:a case study from Chang9 Reservoir in Wuqi Wucangpu,Ordos Basin[J].Unconventional Oil & Gas,2021,8(3):73-79,89.
[5] 赵向原,曾联波,靳宝光,等.低渗透油藏注水诱导裂缝特征及形成机理——以鄂尔多斯盆地安塞油田长6油藏为例[J].石油与天然气地质, 2018, 39(4):696-705.
ZHAO Xiangyuan,ZENG Lianbo,JIN Baoguang,et al.Characteristics and formation mechanisms of waterflood induced fractures in low-permeability reservoirs:a case study from Chang6 Reservoir in Ansai Oilfield,Ordos Basin[J].Oil & Gas Geology,2018,39(4):696-705.
[6] 赵向原,吕文雅,王策,等.低渗透砂岩油藏注水诱导裂缝发育的主控因素——以鄂尔多斯盆地安塞油田W区长6油藏为例[J].石油与天然气地质,2020,41(3):586-595.
ZHAO Xiangyuan,LYU Wenya,WANG Ce,et al.Major factors controlling waterflooding-induced fracture development in low-permeability reservoirs:a case study of Chang6 Reservoir in Block W in Ansai Oilfield,Ordos Basin[J].Oil & Gas Geology,2020,41(3):586-595.
[7] REN G T,JIANG J M,YOUNIS R M.A fully coupled xfem-edfm model for multiphase flow and geomechanics in fractured tight gas reservoirs[J].Procedia Computer Science,2016,80(3):1404-1415.
[8] WANG C,HUANG Z Q,WU Y S.Coupled numerical approach combining X-FEM and the embedded discrete fracture method for the fluid-driven fracture propagation process in porous media[J].International Journal of Rock Mechanics and Mining Sciences,2020,130(2):1-11.
[9] ZENG Q D,YAO J,SHAO J F.Study of hydraulic fracturing in an anisotropic poroelastic medium via a hybrid EDFM-XFEM approach[J].Computers and Geotechnics,2019,105(5):51-68.
[10] HAGOORT J,WEATHERILL B D,SETTARI A.Modeling the propagation of waterflood-induced hydraulic fractures[J].Society of Petroleum Engineers Journal,1980,20(4):293-303.
[11] GADDE P B,SHARMA M M.Growing injection well fractures and their impact on waterflood performance[C].SPE71614-MS,2001:1-12.
[12] FAN T Y, WU S H, LI H, et al.A dynamic hybrid dual porosity model to simulate the waterflood-induced fractures in low-permeability reservoir[C].SPE186319-MS,2017:1-10.
[13] LEI Z D,TIAN C B,WANG F,et al.A dynamic discrete fracture model for simulation of tight low-permeobility reservoirs[C].IPTC17992-MS,2014:1-12.
[14] LEE S H,JENSEN C L,LOUGH M F.Efficient finite-difference model for flow in a reservoir with multiple length-scale fractures[J].SPE Journal,2000, 5(3):268-275.
[15] YANG C X,CHENG L S,CAO R Y,et al.An improved embedded discrete fracture model with fracture growth for water-induced fracture simulation in low permeability reservoirs[J].Lithosphere,2022,2022(4):1-15.
[16] CAO R Y,FANG S D,JIA P,et al.An efficient embedded discrete-fracture model for 2D anisotropic reservoir simulation[J].Journal of Petroleum Science and Engineering,2019, 174(6):115-130.
[17] RENSHAW C E,POLLARD D D.An experimentally verified criterion for propagation across unbounded frictional interfaces in brittle, linear elastic materials[J].International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts,1995,32(3):237-249.
