Constant-pressure production in solution-gas-drive reservoirs; Transient flow
- National Univ. of Mexico/PEMEX (MX)
This paper presents procedures to obtain reservoir parameters from constant-pressure drawdown data in solution-gas-drive reservoirs. A novel procedure to determine the mechanical skin factor is introduced. Examples, including a field case, illustrate the use of this procedure. An estimate of the drainage area can be obtained with the derivative of rate data. A theoretical basis for analyzing data by the pressure-squared, p{sup 2}, approach is presented; this procedure permits the approximate determination of sandface effective permeabilities in the transient flow period. For damaged wells, it is possible to obtain rough estimates of the size of the skin zone and the ratio of reservoir/skin-zone permeability when early transient data are available. The expression of the appropriate dimensionless rate in terms of physical properties for solution-gas-drive systems is presented. Finally, this paper presents a procedure to obtain an estimate of the change in sandface saturation during the transient flow period.
- OSTI ID:
- 5895137
- Journal Information:
- SPE Formation Evaluation (Society of Petroleum Engineers); (United States), Journal Name: SPE Formation Evaluation (Society of Petroleum Engineers); (United States) Vol. 6:2; ISSN 0885-923X; ISSN SFEVE
- Country of Publication:
- United States
- Language:
- English
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42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
ARTIFICIAL LIFTS
CAPILLARY FLOW
DATA PROCESSING
DRAINAGE
ENHANCED RECOVERY
EVALUATION
FLUID FLOW
FORMATION DAMAGE
GAS FLOW
GAS LIFTS
MULTIPHASE FLOW
PERMEABILITY
PRESSURE GRADIENTS
PROCESSING
RECOVERY
RESERVOIR PRESSURE
RESERVOIR ROCK
TRANSITION FLOW