Type Curves For McKinley Analysis Of Drill-Stem Test Data

1977 ◽  
Author(s):  
Gary E. Crawford ◽  
Aaron E. Pierce ◽  
R.M. McKinley
Keyword(s):  
Test Data ◽  
Type Curves ◽  
Drill Stem

scholarly journals An area matching process to estimate the hydraulic parameters using transient constant-head test data

2016 ◽  
Vol 47 (5) ◽  
pp. 919-931 ◽  
Author(s):  
A. Ufuk Şahin ◽  
Emin Çiftçi
Keyword(s):  
Test Data ◽  
Field Data ◽  
Random Noise ◽  
Data Set ◽  
Integration Interval ◽  
Type Curves ◽  
Hydrogeological Parameters ◽  
Matching Process ◽  
Actual Field ◽  
Constant Head

A new parameter estimation methodology was established for the interpretation of the transient constant-head test to identify the hydrogeological parameters of an aquifer. The proposed method, referred as the area matching process (AMP), is based on linking the field data to the theoretical type curve through a unique area computed above these curves bounded by a user specified integration interval. The proposed method removes the need of superimposition of theoretical type curves and field data collected during the test, which may lead to the unexpected errors in assessing aquifer parameters. The AMP approach was implemented for a number of synthetically generated hypothetical test data augmented with several random noise levels, which mimic the uncertainty in site measurement together with porous media heterogeneity, and to an actual field data set available in the literature. The estimation performance of the AMP method was also compared with the existing traditional and recently developed techniques. As demonstrated by the conducted test results, the accuracy, reliability, robustness and simplicity of the proposed technique provide significant flexibility in field applications.

COMPREHENSIVE ANALYSIS OF DRILLSTEM TEST DATA WITH THE AID OF TYPE CURVES

1980 ◽  
Vol 20 (1) ◽  
pp. 229
Author(s):  
B.K. Sinha ◽  
J.M. Montgomery
Keyword(s):  
Test Data ◽  
Comprehensive Analysis ◽  
Insufficient Data ◽  
Type Curve ◽  
Type Curves ◽  
Correct Analysis

A substantial percentage of drillstem tests cannot be analysed by convential methods due to insufficient data. Numerous tests have been analysed by several published type curves.In this paper, many examples are included where the application of the appropriate type curve aided in providing correct analysis of data which otherwise may have been misinterpreted.

Consistent Integration of Drill-Stem Test Data into Reservoir Models on a Giant Field Offshore Norway

2016 ◽  
Author(s):  
Jon Sætrom ◽  
Harald Selseng ◽  
Alister MacDonald ◽  
Tore Kjølseth ◽  
Odd Kolbjørnsen
Keyword(s):  
Test Data ◽  
Drill Stem ◽  
Reservoir Models

Analytical Model for Vertical Interference Tests Across Low-Permeability Zones

1985 ◽  
Vol 25 (03) ◽  
pp. 407-418 ◽  
Author(s):  
R.E. Bremer ◽  
Winston Hubert ◽  
Vela Saul
Keyword(s):  
Point Source ◽  
Test Data ◽  
Low Permeability ◽  
Test Analysis ◽  
Type Curve ◽  
Type Curves ◽  
Pulse Test ◽  
Vertical Permeability ◽  
Interference Test ◽  
Interference Tests

Abstract A mathematical model is developed that describes fluid flow and pressure behavior in a reservoir consisting of two permeable zones separated by a zone of low permeability, Or a "tight zone." This model can be used to design and to interpret buildup, vertical, interference, and pulse tests conducted in a single well or multiple wells across lithological strata. Dimensionless pressure functions and corresponding parametric type curves are derived to interpret vertical interference test data for tight-zone vertical penneability. Application of these type curves is illustrated using field data from two vertical interference tests. Test results obtained with the tight-zone model are shown to compare favorably with results obtained by usingcomputer simulations andBurns' method based on the uniform anisotropy assumption. Computer simulation using a numerical model also shows that high near-wellbore conductivity from a packer leak or poor cement job could not have adversely affected test results. The model presented and the type-curve interpretation method outlined are accurate for designing and interpreting single-well vertical interference tests across low-permeability zones. Introduction The knowledge of vertical flow properties across a low-permeability stratum is becoming increasingly important in reservoir development, especially when enhanced recovery projects are proposed for stratified reservoirs. Vertical well testing is a technique commonly used to determine values for the in-situ vertical permeability of a formation. Either the vertical interference or vertical pulse test may be used, depending on the amount of time required to obtain the necessary pressure response. The method of vertical interterence testing first was introduced by Burns,1 and later developed by Prats.2 Burns' model is based on the assumption of a homogeneous, infinite-acting reservoir with an average vertical permeability smaller than horizontal permeability. Four geometric parameters are used to computer-generate a type curve for analyzing the test data. One difficulty is that each type curve generated is specific to the four geometric parameters and, hence, to the well completion used. The analysis method proposed by Prats uses a plotting technique that does not require computer solutions. However, his technique is restricted by a point-source assumption; that is, the perforated production and observation intervals must be short compared with the distance between them. The most widely used vertical pulse test analysis technique was developed by Falade and Brigham.3–5 Briefly, the method uses sets of correlation curves relating a dimensionless pulse length and dimensionless pulse amplitude. Corrections can be made to account for the upper and lower formation boundaries. It should be noted that the times as given in the Falade and Brigham technique4,5 are too low by a factor of four.6 A second vertical pulse test analysis method, published by Hirasaki,7 is less general in that it considers only the situation with perforations at the upper and lower boundaries. Both methods use a point-source assumption. All previous vertical interference1,2 and vertical pulse3,4,7 test interpretation techniques were developed to determine vertical permeability in a homogeneous single-layer reservoir. These methods may be applied to stratified reservoirs where permeability contrasts are known to occur; however, they may yield misleading results in these cases where the homogeneous reservoir assumption is not justified. This paper presents an analytical model and interpretation technique to analyze vertical interference test data for tight-zone vertical permeability in a reservoir consisting of two permeable zones separated by a tight zone or a zone of low permeability. Pressure response data in the observation zone are plotted in a ?p vs. ?t format on log-log coordinates and matched against one of two type curves. The result of this match is a value for horizontal permeability in the upper and lower layers and a value for the effective vertical permeability across the tight zone. The type curves included are applicable for a wide range of thickness ratios between the permeable and low-permeability layers. Additionally, use of the model is not restricted by a point-source assumption.

scholarly journals Interactive computer processing and interpretation of pumping test data. A Micro-computer program using dynamic graphics

1985 ◽  
Vol 4 ◽  
pp. 1-98
Author(s):  
Bjarne Madsen
Keyword(s):  
Computer Program ◽  
Groundwater Flow ◽  
Test Data ◽  
Pumping Test ◽  
Flow Equation ◽  
Hard Copy ◽  
Type Curve ◽  
Type Curves ◽  
Wide Range ◽  
Graphic Screen

This paper presents a computer program for analysing pumping test data. The program is interactive and may be used with a minimum knowledge of computers. It can be applied to a wide range of transient problem types, from one dimensional groundwater flow to flow in anisotropic aquifers, horizontally as well as vertically. Various forms of type curves based on analytical solutions to the groundwater flow equation are available for the interpretation. The paper includes a listing of the entire computer program containing a total of about 1. 800 lines. The programming language is a BASIC-version suited for the Tektronix 4054, a graphic screen with a refresh option. This option allows the user to perform type curve matching directly on the screen by moving the chosen type curve to the position where it gives the best fit, in a manner similar to traditional manual chart interpretation. Plots of the measured data may be conveniently reproduced in semilog and log-log diagrams, either on the screen or as a hard copy printed by a plotter. The present version of the program makes use of tape cartridges, both for storing program and data files.

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