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Keywords: dimensionless time
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Journal Articles
A Test for Detecting Rock Property Nonuniformities in Core Samples
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 25 (06): 909–916.
Paper Number: SPE-12585-PA
Published: 01 December 1985
... dynamics dimensionless time upstream oil & gas pressure-drop profile injection rate relative permeability analytical solution displacement rock property nonuniformity core sample porosity detecting rock property nonuniformity pressure drop streamline mobility ratio equation flow...
Journal Articles
Unsteady-State Spherical Flow With Storage and Skin
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 25 (06): 804–822.
Paper Number: SPE-12950-PA
Published: 01 December 1985
... that the identities in Eqs. 2 through 4 are not defined in conventional fashion. For example, the transformation in Eq. 3 consolidates both independent variables t and r into a single expression for the dimensionless time, t D . Variables of this type have been called similarity variables by several...
Journal Articles
Type Curves for Finite Radial and Linear Gas-Flow Systems: Constant-Terminal-Pressure Case
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 25 (05): 719–728.
Paper Number: SPE-12917-PA
Published: 01 October 1985
... configurations are given. The Appendix contains derivations of the dimensionless variables and the drawdown parameter. type-curve match production control compressibility linear flow drillstem testing average reservoir pressure dimensionless time production monitoring production rate viscosity...
Journal Articles
Pressure Transient Analysis Methods for Bounded Naturally Fractured Reservoirs
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 25 (03): 451–464.
Paper Number: SPE-11243-PA
Published: 01 June 1985
... wellbore pressure drop vs. dimensionless time exhibits a straight line. The information that can be obtained from the various possible combinations of Flow Regimes 1 through 3 is discussed in Refs. 7 and 8 . Flow Regime 5 corresponds to pseudosteady-state flow. Flow Regime 4 denotes a flow period during...
Journal Articles
Interference Between Constant-Rate and Constant-Pressure Reservoirs Sharing a Common Aquifer
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 25 (03): 419–426.
Paper Number: SPE-12711-PA
Published: 01 June 1985
... line source finite-radius source reservoir 1 pressure transient analysis pressure response relative size dimensionless time line-source reservoir superposition artificial intelligence bessel function constant-pressure subregion finite-radius reservoir Pressure interference between...
Journal Articles
Problems in Characterization of Naturally Fractured Reservoirs From Well Test Data
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 25 (03): 445–450.
Paper Number: SPE-12014-PA
Published: 01 June 1985
... of the transition period as a combination of two straight lines, the first line having a slope of one-half, the second with a slope of two-thirds of the late-time trend. Specifically, they indicated that the half-slope occurs around the dimensionless time of (1) ( t D ) H = 5 ω e γ...
Journal Articles
Well Test Analysis for Wells Producing Layered Reservoirs With Crossflow
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 25 (03): 380–396.
Paper Number: SPE-10262-PA
Published: 01 June 1985
... skin factor dimensionless time flow in porous media fluid dynamics We consider skin regions of finite thickness with permeabilities different from the formation permeabilities. In this case, we also consider situations in which the vertical permeability is equal to or different from...
Journal Articles
The Effect of Crossflow on Waterflooding of Stratified Reservoirs
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 25 (02): 291–302.
Paper Number: SPE-11495-PA
Published: 01 April 1985
... permeability dimensionless time enhanced recovery porosity jth layer stratified system oil recovery reservoir simulation reservoir characterization waterflooding mobility ratio flow in porous media breakthrough pressure drop gravity gravitational force petroleum engineer journal...
Journal Articles
Pressure Response at Observation Wells in Fractured Reservoirs
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 24 (06): 628–638.
Paper Number: SPE-10839-PA
Published: 01 December 1984
... fracturing production monitoring dimensionless time reservoir surveillance complex reservoir reservoir drillstem/well testing production control petroleum engineer journal homogeneous reservoir Here, k f is the permeability of the fracture system and h ft is the total thickness...
Journal Articles
Steam Zone Growth in Cylindrical Channels
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 24 (05): 481–483.
Paper Number: SPE-11873-PA
Published: 01 October 1984
... wall and sensible heat requirements within the zone, it is possible to estimate the channel size from the time of steam breakthrough at a producer. 10 3 1983 29 11 1983 26 8 1983 1 10 1984 1 10 1984 Copyright 1984, Society of Petroleum Engineers dimensionless time...
Journal Articles
Optimal Injection Policies for Enhanced Oil Recovery: Part 2—Surfactant Flooding
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 24 (03): 333–341.
Paper Number: SPE-12814-PA
Published: 01 June 1984
... oil saturation viscosity dimensionless time surfactant concentration flow in porous media fluid dynamics chemical cost injection policy oil recovery equation concentration slug coefficient petroleum engineer journal dimensionless surfactant concentration Surfactant recovery...
Journal Articles
An Analytical Model for One-Dimensional, Three-Component Condensing and Vaporizing Gas Drives
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 24 (02): 169–179.
Paper Number: SPE-10069-PA
Published: 01 April 1984
... measurement injection gas reservoir surveillance characteristic velocity reservoir simulation petroleum engineer journal flow rate production monitoring dimensionless time Gas injection is increasingly being applied as a secondary or tertiary recovery technique. In many applications injection...
Journal Articles
Modeling Infinite-Conductivity Vertical Fractures With Source and Sink Terms
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 23 (04): 633–644.
Paper Number: SPE-10507-PA
Published: 01 August 1983
... of the diagonals of a constant-pressure outer boundary square reservoir. The solutions for all these cases are reported in the form of tables and plots of dimensionless pressure drop vs. dimensionless time for different fracture-penetration ratios. This paper presents a method for modeling ICVF's with source...
Journal Articles
Influence of Fracture Heterogeneity and Wing Length on the Response of Vertically Fractured Wells
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 23 (02): 219–230.
Paper Number: SPE-9886-PA
Published: 01 April 1983
... = 141.2 B μ q ( t ) k h ( p i − p w f ) . Dimensionless time is defined as (3) t D x f = 0.0002637 k t ϕ c t μ L x f . The dimensionless distances are given by (4) x D = x / L x e...
Journal Articles
The Influence of Vertical Fractures Intercepting Active and Observation Wells on Interference Tests
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 22 (06): 933–944.
Paper Number: SPE-9346-PA
Published: 01 December 1982
... × 10 − 6 k h q B μ [ p i − p ( x , y , t ) ] , 18 7 1980 9 8 1982 10 12 1981 1 12 1982 1 12 1982 Copyright 1982, Society of Petroleum Engineers dimensionless time fracture plane artificial intelligence pressure...
Journal Articles
Unsteady-State Water Influx in Elliptic and Anisotropic Reservoir/Aquifer Systems
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 21 (03): 309–314.
Paper Number: SPE-8748-PA
Published: 01 June 1981
... of the internal boundary ellipse). Tabular and graphical forms of the dimensionless cumulative water influx and influx rate are presented as a function of the dimensionless time for various internal boundary geometries ranging from a e /b e = 1, which corresponds to a circle, to a a e /b e = ∞, which corresponds...
Journal Articles
Effect of Non-Darcy Flow on the Constant-Pressure Production of Fractured Wells
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 21 (03): 390–400.
Paper Number: SPE-9344-PA
Published: 01 June 1981
... constant-pressure production hydraulic fracturing fluid dynamics dimensionless time drillstem testing one-quarter slope vertical fracture fractured well dnd fracture fracture permeability pressure drop non-darcy flow beta factor upstream oil & gas type-curve matching correlation...
Journal Articles
Analysis of Pressure Data From Vertically Fractured Injection Wells
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 21 (01): 5–20.
Paper Number: SPE-8282-PA
Published: 01 February 1981
... drainage region dimensionless time drillstem testing flow in porous media graph petroleum engineer journal reservoir simulation average pressure orientation enhanced recovery fluid dynamics flowing time pressure transient analysis pressure transient testing straight line...
Journal Articles
Transient Rate Decline Analysis for Wells Produced at Constant Pressure
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 21 (01): 98–104.
Paper Number: SPE-8387-PA
Published: 01 February 1981
... s ≅ k t M / ( μ c t r w 2 t D M ) . Fig. 2 is a graph of the dimensionless flow rate vs. dimensionless time computed with the wellbore radius corrected to an effective radius for positive skin factor. For very small flow times ( t D < 10), the type...
Journal Articles
Transient Pressure Behavior for a Well With a Finite-Conductivity Vertical Fracture
Available to Purchase
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 18 (04): 253–264.
Paper Number: SPE-6014-PA
Published: 01 August 1978
...Heber Cinco L.; F. Samaniego V.; N. Dominguez A. A mathematical model was developed to study the transient behavior of a well with a finite-conductivity vertical fracture in an infinite slab reservoir. For values of dimensionless time of interest, to >10, the dimensionless wellbore pressure, p...
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