Type curves for analyzing naturally fractured reservoirs
A solution representing flow at the wellbore in a naturally fractured reservoir is presented in this paper. The model used to develop this solution assumes unsteady state interaction between the fractures and the matrix. Wellbore storage and skin are considered in determining the boundary conditions for this model. A new set of type curves for analyzing pressure transient data from naturally fractured reservoirs is presented. Each type curve within the set is for a different value of C/sub D/e/sup 2S/. Each type curve presents one radial flow solution with the associated family of curves approximating behavior at intermediate flow times. Each curve within a family is for a different ..omega..'lambda' product, where ..omega..' and lambda' depend upon fracture/matrix storativity and permeability ratio, respectively. Ambiguity is eliminated when a simultaneous match of data against the dimensionless pressure curves and the differential dimensionless pressure curves is performed. Reservoir and well parameters including permeability, skin, dimensionless wellbore storage, ..omega..', and lambda' can be calculated from this match. Truer matches against actual natural fracture pressure transient data are obtained by using these curves instead of existing type curves. The principal advantages of using these curves are discussed. Use of these curves is explained in detail. Applicability of the curves is demonstrated by successfully matching actual pressure transient data against the curves.
- Research Organization:
- Halliburton Services
- OSTI ID:
- 7200470
- Report Number(s):
- CONF-861080-
- Country of Publication:
- United States
- Language:
- English
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020200* -- Petroleum-- Reserves
Geology
& Exploration
ANALYTICAL SOLUTION
BOUNDARY CONDITIONS
DATA ANALYSIS
FLUID FLOW
FLUID MECHANICS
FLUIDS
FRACTURED RESERVOIRS
GEOLOGIC DEPOSITS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
HYDRAULICS
MATHEMATICAL MODELS
MECHANICS
MINERAL RESOURCES
OIL WELLS
PERMEABILITY
PETROLEUM DEPOSITS
PRESSURE GRADIENTS
PRESSURE MEASUREMENT
RESERVOIR FLUIDS
RESERVOIR PRESSURE
RESOURCES
SATURATION
WELL PRESSURE
WELLS