Characterization of unique natural gas flow in fracture-vuggy carbonate reservoir: A case study on Dengying carbonate reservoir in China

被引:18
|
作者
Xie, Xinhui [1 ,3 ]
Lu, Hongjiang [1 ,2 ]
Deng, Hucheng [1 ,2 ]
Yang, Hongzhi [4 ]
Teng, Bailu [3 ]
Li, Huazhou Andy [3 ]
机构
[1] Chengdu Univ Technol, Coll Energy Resources, Chengdu 610059, Sichuan, Peoples R China
[2] Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Sichuan, Peoples R China
[3] Univ Alberta, Sch Min & Petr Engn, Edmonton, AB T6G 1H9, Canada
[4] PetroChina Southwest Oil & Gas Field Co, Chengdu 610051, Sichuan, Peoples R China
基金
加拿大自然科学与工程研究理事会;
关键词
Fracture-vuggy carbonate reservoir; Natural gas flow; Stokes-Brinkman equation; Permeability anisotropy; SICHUAN BASIN; DARCYS-LAW; FIELD; SIMULATION; MODEL; HOMOGENIZATION; RESTORATION; VISCOSITY;
D O I
10.1016/j.petrol.2019.106243
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
We investigate the natural gas flow behavior in the Dengying carbonate reservoir of Gaoshiti-Moxi Block in China. Outcrops observation, petrophysical properties measurement, and formation micro-resistivity image logging (FMI) all show that the vugs distribute in a stratified manner with characteristic length ranging from 0.2 to 4 cm. The horizontal permeability is significantly larger than the vertical permeability due to the stratified distribution of vugs and fractures. We build a representative conceptual reservoir model to describe this fracture-vuggy type carbonate reservoir. Both Darcy equation and Stokes-Brinkman equation are applied to simulate natural gas flow in this type of reservoir. Simulation results show that natural gas mainly flows along the free channel formed by low-dip fractures and flat ellipsoid vugs. Compared with the Darcy method, the Stokes-Brinkman method provides a more accurate prediction of gas flow behavior in the fracture-vug carbonate reservoir.
引用
收藏
页数:14
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