Numerical Modeling and Simulation of Fractured-Vuggy Reservoirs Based on Field Outcrops

Li，Sanbai1,2; Kang，Zhijiang3; Zhang，Yun3

2023-10-01

10.3390/w15203687

Water (Switzerland)   影响因子和分区

2073-4441

We propose a novel workflow to investigate the complex flow behaviors and remaining oil distribution related to the oil–gas–water three-phase system based on information from typical outcrops of fractured-vuggy reservoirs. A refined geological model is built to represent the size, geometry, and spatial distribution of the karst caves and fractures extracted from the field outcrop photographs. The combination of the perpendicular bisector (PEBI) grid technique and the control-volume finite difference method is adopted for space discretization. We have validated the numerical model against experimental data. Numerical simulations were performed to explore the impacts of the permeability of karst cave and natural fractures and the position of natural water bodies upon oil production performance. Numerical results indicate that (1) the cave permeability has few impacts on the oil production, yet the fracture permeability plays a significant role in determining the oil recovery; (2) a higher permeability of the fractures will lead to a longer period of time for no-water oil production and, thus, a higher oil recovery; (3) the position of natural water body shows significant impacts on oil recovery, e.g., a short distance between the natural water body and the production well tends to form preferential passages, causing severe reduction of water flooding range; and (4) the distribution of remaining oil is controlled by spatial patterns of the fractured-vuggy system and reservoir development schemes. We found that the remaining oil is mainly distributed along the model boundaries and at the corner of the caves with single or multiple connection/s to fractures.

carbonate reservoirs control-volume finite difference method filed outcrops fractured-vuggy reservoirs numerical simulations PEBI grid technique

SCI ; EI

英语

第一 ; 通讯

Environmental Sciences & Ecology ; Water Resources

Environmental Sciences ; Water Resources

WOS:001093529300001

MDPI

20234515008886

Caves ; Finite difference method ; Natural fractures ; Numerical methods ; Petroleum reservoir engineering ; Petroleum reservoirs

Strength of Building Materials; Mechanical Properties:421 ; Geology:481.1 ; Oil Fields:512.1.1 ; Petroleum Deposits : Development Operations:512.1.2 ; Mathematics:921 ; Numerical Methods:921.6

2-s2.0-85175419321

Scopus

1.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.National Center for Applied Mathematics Shenzhen (NCAMS),Southern University of Science and Technology,Shenzhen,518055,China
3.Petroleum Exploration & Production Research Institute,SINOPEC,Beijing,100083,China

Li，Sanbai,Kang，Zhijiang,Zhang，Yun. Numerical Modeling and Simulation of Fractured-Vuggy Reservoirs Based on Field Outcrops[J]. Water (Switzerland),2023,15(20).

Li，Sanbai,Kang，Zhijiang,&Zhang，Yun.(2023).Numerical Modeling and Simulation of Fractured-Vuggy Reservoirs Based on Field Outcrops.Water (Switzerland),15(20).

Li，Sanbai,et al."Numerical Modeling and Simulation of Fractured-Vuggy Reservoirs Based on Field Outcrops".Water (Switzerland) 15.20(2023).