Combination model for simulating transient gas flow in a vertically fractured reservoir. Technical progress report. [Storage field]
One- and two-dimensional gas reservoir simulators were combined in such a manner that pressure distributions both in an induced vertical fracture and in the surrounding formation, could be determined as a function of time for any specific well production rate. Basic assumptions regarding the fracture were as follows: (1) the fracture completely penetrates the formation, (2) all flow into the wellbore enters via the fracture, and (3) flow in the fracture is described by Darcy's law. The technique consisted of the alternate use of one- and two-dimensional algorithms for obtaining new pressure distributions in the fracture and the reservoir, respectively. The finite-difference grid penetrates the fracture in the direction normal to the fracture axis so that corresponding to each fracture node, there is an adjacent reservoir node. The pressures at these adjacent nodes were used to calculate flow rates from the formation into the fracture, which provided source terms for both algorithms. The combination model developed provides the only known means of simultaneously simulating transient gas flow in a vertical fracture and the surrounding formation. Thus, the technique developed would be useful in locating wells in a gas storage field in that the effects of both fracture length and conductivity could be considered prior to drilling and fracturing operations. In addition, it will be helpful in analyzing pressure drawdown tests in a vertically fractured gas well since the entire test can be readily stimulated for a wide range of reservoir and fracture properties.
- Research Organization:
- Bureau of Mines, Morgantown, W.Va. (USA). Morgantown Energy Research Center
- OSTI ID:
- 7231576
- Report Number(s):
- NP-21634
- Country of Publication:
- United States
- Language:
- English
Similar Records
Combination model for simulating transient gas flow in a vertically fractured reservoir
Development of multi-faceted well simulator. Final report
Related Subjects
NATURAL GAS
UNDERGROUND STORAGE
NATURAL GAS FIELDS
FRACTURING
ALGORITHMS
FLOW RATE
MATHEMATICAL MODELS
NATURAL GAS WELLS
SIMULATION
COMMINUTION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GEOLOGIC DEPOSITS
MATHEMATICAL LOGIC
NATURAL GAS DEPOSITS
RESOURCES
STORAGE
WELLS
030900* - Natural Gas- Artificial Stimulation
Plowshare- (-1989)
035000 - Natural Gas- Storage- (1989-)