Multiphase flow through cleats in coal. Annual report, September 1990-August 1991
Coalbed reservoir permeability is primarily controlled by cleats and fractures in the coal. Because coalbeds are often saturated with brine, the simultaneous flow of gas and water occurs. A formal program of experimental and numerical research is underway to investigate the effect of cleat void geometry on multiphase flow through coal. Sample preparation techniques were developed for preparing coal drill cores for gas flow experiments and metal injection experiments. A Wood's metal porosimetry system was designed and built that consists of a hydrostatic pressure vessel, pore fluid system, and a data acquisition system. The feasibility of using Wood's metal porosimetry on coal was demonstrated. Data on effective cleat porosity, cleat aperture, spatial distribution of apertures, cleat density and cleat spacing were obtained. A stratified continuum model was used to generate cleat void simulations for modeling two-phase flow in a cleat. Two-phase flow modeling is based on capillary pressure effects alone and examines the effect of trapping water in a cleat on the capillary pressure-saturation relationship.
- Research Organization:
- Purdue Univ., Lafayette, IN (United States). Dept. of Earth and Atmospheric Sciences
- OSTI ID:
- 7133579
- Report Number(s):
- PB-93-114387/XAB; CNN: GRI-5090-260-2003
- Resource Relation:
- Other Information: Portions of this document are not fully legible
- Country of Publication:
- United States
- Language:
- English
Similar Records
Multiphase flow through cleats in coal. Annual report, January-December 1993
Multiphase flow through cleats in coal. Final report, September 1990-December 1992
Related Subjects
03 NATURAL GAS
COAL DEPOSITS
PERMEABILITY
GROUND WATER
MULTIPHASE FLOW
FRACTURED RESERVOIRS
INJECTION
MATHEMATICAL MODELS
POROSITY
SEISMIC WAVES
TEST FACILITIES
VOIDS
WAVE PROPAGATION
FLUID FLOW
GEOLOGIC DEPOSITS
HYDROGEN COMPOUNDS
INTAKE
MINERAL RESOURCES
OXYGEN COMPOUNDS
RESOURCES
WATER
011000* - Coal
Lignite
& Peat- Reserves
Geology
& Exploration
030300 - Natural Gas- Drilling
Production
& Processing