Pressure-transient analysis for naturally fractured gas reservoirs; Field cases

Journal Article · Fri Sep 01 00:00:00 EDT 1989 · SPE (Society of Petroleum Engineers) Formation Evaluation; (USA)

DOI:https://doi.org/10.2118/12010-PA· OSTI ID:5499519

Samanlego, V F; Cineo-Ley, H ^[1]

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1. Univ. of Mexico (MX)

This paper analyzes three field tests performed in two naturally fractured gas reservoirs. The interpretation can properly be accomplished by use of a single infinite-conductivity vertical-fracture model that considers the intersection of the well by a planar fracture and a homogeneous and isotropic matrix. Conditions of the tests include almost constant flow rate before shut-in in the first case and variable flow rate before shut-in in the second case. A square-root group ({radical}tau/sub rhorho/ - {radical}tau/sub rhorho/ + {Delta}tau/sub rho/ + {radical}{Delta}tau/sub rho/)/sup 2/ is discussed for test analysis where final flowing conditions are linear flow and the shut-in period does not meet the restriction tau/sub rho/ > 10{Delta}tau/sub max/. A new type curves in terms of rho/sub D//C/sub fD/ vs. tau/sub xfD//D/sub fD//sup 2/ corresponding to linear-flow conditions under the effect of wellbore storage is presented.

• OSTI ID: 5499519
• Journal Information: SPE (Society of Petroleum Engineers) Formation Evaluation; (USA), Journal Name: SPE (Society of Petroleum Engineers) Formation Evaluation; (USA) Vol. 4:3; ISSN 0885-923X; ISSN SFEVE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
BOREHOLES
CAVITIES
CRACK PROPAGATION
DATA ANALYSIS
ENERGY SOURCES
FIELD TESTS
FLUID FLOW
FLUIDS
FOSSIL FUELS
FRACTURED RESERVOIRS
FUEL GAS
FUELS
GAS FUELS
GASES
NATURAL GAS
OIL WELLS
PRESSURE GRADIENTS
TESTING
VARIATIONS
VERTICAL INTEGRATION
WELLS