Comparison of Conventional and Type Curve Analysis of Pressure Falloff Tests for a West Texas Carbonate Reservoir

1981 ◽  
Author(s):  
Duane A. Crawford ◽  
Herschel N. Waller ◽  
L.J. Sanders
Keyword(s):  
Curve Analysis ◽  
Carbonate Reservoir ◽  
Type Curve ◽  
West Texas

Type-Curve Analysis Using the Pressure Integral Method

1989 ◽  
Author(s):  
T.A. Blasingame ◽  
J.L. Johnston ◽  
W.J. Lee
Keyword(s):  
Integral Method ◽  
Curve Analysis ◽  
Type Curve

High resolution cross‐well imaging of a west texas carbonate reservoir: Part 1. Data acquisition and project overview

1992 ◽  
Author(s):  
J. M. Harris ◽  
Richard Nolen‐Hoeksema ◽  
J. W. Rector ◽  
M. Van Schaack ◽  
S. K. Lazaratos
Keyword(s):  
High Resolution ◽  
Data Acquisition ◽  
Carbonate Reservoir ◽  
West Texas

Unified Decline Type-Curve Analysis for Natural Gas Wells in Boundary-Dominated Flow

SPE Journal ◽  
2012 ◽  
Vol 18 (01) ◽  
pp. 97-113 ◽  
Author(s):  
Ayala H Luis F. ◽  
Peng Ye
Keyword(s):  
Natural Gas ◽  
Constant Pressure ◽  
Curve Analysis ◽  
Production Data ◽  
Gas Wells ◽  
Production Potential ◽  
Type Curve ◽  
Type Curves ◽  
Decline Curve Analysis ◽  
Decline Curve

Summary Rate-time decline-curve analysis is the technique most extensively used by engineers in the evaluation of well performance, production forecasting, and prediction of original fluids in place. Results from this analysis have key implications for economic decisions surrounding asset acquisition and investment planning in hydrocarbon production. State-of-the-art natural gas decline-curve analysis heavily relies on the use of liquid (oil) type curves combined with the concepts of pseudopressure and pseudotime and/or empirical curve fitting of rate-time production data using the Arps hyperbolic decline model. In this study, we present the analytical decline equation that models production from gas wells producing at constant pressure under boundary-dominated flow (BDF) which neither employs empirical concepts from Arps decline models nor necessitates explicit calculations of pseudofunctions. New-generation analytical decline equations for BDF are presented for gas wells producing at (1) full production potential under true wide-open decline and (2) partial production potential under less than wide-open decline. The proposed analytical model enables the generation of type-curves for the analysis of natural gas reservoirs producing at constant pressure and under BDF for both full and partial production potential. A universal, single-line gas type curve is shown to be straightforwardly derived for any gas well producing at its full potential under radial BDF. The resulting type curves can be used to forecast boundary-dominated performance and predict original gas in place without (1) iterative procedures, (2) prior knowledge of reservoir storage properties or geological data, and (3) pseudopressure or pseudotime transformations of production data obtained in the field.

High‐resolution crosswell imaging of a west Texas carbonate reservoir: Part 2—Wavefield modeling and analysis

Geophysics ◽  
1995 ◽  
Vol 60 (3) ◽  
pp. 682-691 ◽  
Author(s):  
Mark Van Schaack ◽  
Jerry M. Harris ◽  
James W. Rector ◽  
Spyros Lazaratos
Keyword(s):  
High Resolution ◽  
High Velocity ◽  
Field Data ◽  
Sampling Interval ◽  
Low Noise ◽  
Carbonate Reservoir ◽  
Modeling And Analysis ◽  
S Waves ◽  
West Texas ◽  
Wavefield Separation

We have collected low‐noise crosswell data in a high‐velocity carbonate environment with a spatial sampling interval of 2.5 ft (0.76 m). This sampling reveals a variety of coherent events not previously identified in coarsely sampled gathers. Nearly every event in our field record can be explained using simple approximations for the geology, source, and receivers without accounting for the presence of the boreholes. We have used synthetic records as a guide in a moveout‐based analysis of the field data. Our analysis shows that much of the full wavefield energy, i.e., scattered waves, in our data are converted modes arising from the direct P‐ and S‐waves. This observation suggests that for crosswell reflection imaging, the focus of acquisition and wavefield separation techniques should be on the suppression of once‐converted modes.

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