Simulation of naturally fractured reservoirs
A three-dimensional, three-phase reservoir simulator was developed to study the behavior of fully or partially fractured reservoirs. It is also demonstrated, that when a fractured reservoir is subject to a relatively large rate of pressure drop and/or it composed of relatively large blocks, the pseudo steady-state pressure concept gives large errors as compared with transient fromulation. In addition, when gravity drainage and imbibitum processes, which is the most important mechanism in the fractured reservoirs, are represented by a ''lumped parameter'' even larger errors can be produced in exchange flow between matrix and fractures. For these reasons, the matrix blocks are gridded and the transfer between matrix and fractures are calculated using pressure and diffusion transient concept. In this way the gravity drainage is also calculated accurately. As the matrix-fracture exchange flow depends on the location of each matrix grid relative to the GOC and/or WOC in fracture, the exchange flow equation are derived and given for each possible case. The differential equation describing the flow of water, oil, and gas within the matrix and fracture system, each of which may contain six unknowns, are presented. The two sets of equations are solved implicitly for pressure water, and gas stauration in both matrix and fractures. The first twenty two years of the history of Haft Kel field was successfully matched with this model and the results are included.
- OSTI ID:
- 5321634
- Report Number(s):
- CONF-831190-
- Journal Information:
- Soc. Pet. Eng. AIME, Pap.; (United States), Vol. SPE 11270; Conference: 7. Society of Petroleum Engineers reservoir simulation symposium, San Francisco, CA, USA, 15 Nov 1983
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fractured reservoir simulation
INVESTIGATION OF EFFICIENCY IMPROVEMENTS DURING CO2 INJECTION IN HYDRAULICALLY AND NATURALLY FRACTURED RESERVOIRS
Related Subjects
FRACTURED RESERVOIRS
SIMULATION
RESERVOIR FLUIDS
FLOW MODELS
FINITE DIFFERENCE METHOD
FLUID FLOW
GAS SATURATION
MATHEMATICAL MODELS
OIL SATURATION
PRESSURE DROP
RESERVOIR PRESSURE
RESERVOIR ROCK
THREE-DIMENSIONAL CALCULATIONS
WATER SATURATION
FLUIDS
ITERATIVE METHODS
NUMERICAL SOLUTION
SATURATION
020300* - Petroleum- Drilling & Production