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Characterization of unique natural gas flow in fracture-vuggy carbonate reservoir: A case study on Dengying carbonate reservoir in China
- Source :
- Journal of Petroleum Science and Engineering. 182:106243
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- 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.
- Subjects :
- Characteristic length
Outcrop
business.industry
Petrophysics
02 engineering and technology
010502 geochemistry & geophysics
Geotechnical Engineering and Engineering Geology
01 natural sciences
Darcy–Weisbach equation
Permeability (earth sciences)
chemistry.chemical_compound
Fuel Technology
020401 chemical engineering
chemistry
Natural gas
Carbonate
0204 chemical engineering
Petrology
business
Geology
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 09204105
- Volume :
- 182
- Database :
- OpenAIRE
- Journal :
- Journal of Petroleum Science and Engineering
- Accession number :
- edsair.doi...........cb77a8f0bb7d7f28b07cfe13343a8d3e