Advances In Evaluating Gas Well Deliverability Using Variable Rate Tests Under Non-Darcy Flow

1981 ◽  
Author(s):  
Henri Pascal
Keyword(s):  
Darcy Flow ◽  
Variable Rate ◽  
Gas Well

Gas Well Decline Analysis Under Constant-Pressure Conditions, Wellbore Storage, Damage, and Non-Darcy Flow Effects

2002 ◽  
Author(s):  
Ibrahim Sami Nashawi ◽  
Fuad H. Qasem ◽  
Ridha Gharbi ◽  
Mohammad I. Mir
Keyword(s):  
Constant Pressure ◽  
Darcy Flow ◽  
Gas Well ◽  
Wellbore Storage ◽  
Flow Effects

An Investigation of Non-Darcy Flow Effects on Hydraulic Fractured Oil and Gas Well Performance

2004 ◽  
Author(s):  
M.B. Smith ◽  
A. Bale ◽  
L.K. Britt ◽  
L.E. Cunningham ◽  
J.R. Jones ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Darcy Flow ◽  
Well Performance ◽  
Gas Well ◽  
Flow Effects

Gas-Production-Data Analysis of Variable-Pressure-Drawdown/Variable-Rate Systems: A Density-Based Approach

2014 ◽  
Vol 17 (04) ◽  
pp. 520-529 ◽  
Author(s):  
Miao Zhang ◽  
Luis F. Ayala H.
Keyword(s):  
Data Analysis ◽  
Material Balance ◽  
Gas Production ◽  
Variable Pressure ◽  
Production Data ◽  
Variable Rate ◽  
Well Performance ◽  
Gas Well ◽  
Type Curves ◽  
Performance Forecasting

Summary This study demonstrates that production-data analysis of variable-bottomhole-flowing-pressure/variable-rate gas wells under boundary-dominated flow (BDF) is possible by use of a density-based approach. In this approach, governing equations are expressed in terms of density variables and dimensionless viscosity/compressibility ratios. Previously, the methodology was successfully used to derive rescaled exponential models for gas-rate-decline analysis of wells primarily producing at constant bottomhole pressure (Ayala and Ye 2013a, b; Ayala and Zhang 2013; Ye and Ayala 2013; Zhang and Ayala 2014). For the case of natural-gas systems experiencing BDF, gas-well-performance analysis has been made largely possible by invoking the concepts of pseudotime, normalized pseudotime, or material-balance pseudotime. The density-based methodology rigorously derived in this study, however, does not use any type of pseudotime calculations, even for variable-rate/variable-pressure-drawdown cases. The methodology enables straightforward original-gas-in-place calculations and gas-well-performance forecasting by means of type curves or straight-line analysis. A number of field and numerical case studies are presented to showcase the capabilities of the proposed approach.

Gas Well Decline Analysis Incorporating Real-Gas Behavior and Non-Darcy Flow

1986 ◽  
Author(s):  
S.H. Schmidt ◽  
B.H. Caudle ◽  
M.A. Miller
Keyword(s):  
Darcy Flow ◽  
Gas Well ◽  
Real Gas
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