For oil and geothermal reservoirs with low formation permeability the duration of the test may require a long period of time and it can be difficult to maintain a constant. For a buildup after a single drawdown period at rate q during t p. Item analysis is useful in helping test designers determine which items to keep, modify, or discard on a. The well test interpretation procedure has been completely automated in. This course consists of lecture presentations and doing exercises using pcs and a software featuring all the latest analysis techniques. Item analysis the examination of individual items on a test, rather than the test as a whole, for its difficulty, appropriateness, relationship to the rest of the test, etc. Reservoir characterization constrained to welltest data mmc. Performing a harmonic test requires an impractical test time, longer than conventional tests by more than one order of magnitude hollaender et al. Unlike any other oil and gas surveillance activity, a pressure transient test provides information about well and reservoir performance permeabilitythickness kh and skin s, hydraulic connectivity over large volume and average reservoir pressure.
Interpret well test to determine reservoir properties analyze transient well data to diagnose well condition design well tests for maximum efficiency and success. Processing and analysis of transient pressure from permanent. Pressure transient analysis pta of well testing data is a key tool for the oil and gas industry. Horne, modern well test analysis, second edition, petroway, inc. Semilog analysis type curve analysis well test concepts and design. This highly regarded course has been attended by thousands of oil and gas, and geothermal professionals around the world for more than 20 years.
In most cases of well testing, the reservoir response that is measured is the pressure response. All constantrate welltest solutions in a slab reservoir had a sernilog straight line of the same. Unlike any other surveillance activity, a pressure transient test provides information about the well and reservoir performance permeabilitythickness kh and skin s, hydraulic connectivity over large volume and average reservoir pressure. A drill stem test is a test which uses a special tool mounted on the end of the drill string. Conventional well testing methods usually involve surface production of fluid or changing rate at the surface. Well test interpretation is therefore an inverse problem in that model parameters are inferred by analyzing model response to a given input. Course attendees will receive a textbook on well test analysis written by dr. Horne stanford university overview during the 1980s, there were several major advances in the science of well test interpretation, these have been associated with. Modern well test analysis oil and gas training courses in. The present study, focuses on green well test procedures that do not involve surface. Reservoir characterization constrained to welltest data. Rosa and horne 1983 conducted a comprehensive study of nonlinear.
The well tests conducted in the well kd15 were found to be suitable for the purpose of analysis with such modern. Roland horne has designed this course to show you how to. This test involves simultaneous production from a pay zone and reinjection into other. Horne r modern well test analysis, a computer aided. The permanent downhole gauge pdg is a promising resource for real time downhole measurement. The challenges of using regression in well test analysis is compounded by the. N modern well test analysis, a computeraided approach. A procedure to integrate well test data, reservoir performance history and 4d seismic information into a reservoir description. The suprid research group investigates and supports novel approaches to the interpretation of oil, gas, geothermal, and water well tests. Advances in practical welltest analysis semantic scholar.
Conventional well testing usually involves production of reservoir fluid at the surface. Interference well testingvariable fluid flow rate journal. Aquifer testing reference list aquifer testing 101. Durocdanner pressure transient analysis in drawdown and buildup background to transient pressure analysis introduction development of pressure testing exploration well testing radial flow theory the basic flow equations fluid of constant compressibility further development of the accumulation term linearization of the radial flow. Part 1 petroleum engineers face the daily challenges of designing and testing wells. During a well test, a transient pressure response is created by a temporary change in production rate.
Backed by a wealth of information thanks to modern computerization and big data, well test analysis and design has greatly increased the reliability of test results for far less cost. Advances in well test analysis during the 1980s and 90shave been associated with. Horne is the author of modern well test analysis 4. Pdf horne r modern well test analysis, a computer aided. The well cased with 958 to 1016 m and it is open hol between 1016 and 16 m. For all the tests in transient regime the measurements of pressure were made at 1075 m depth, thus near the upper permeable zones of the deep reservoir in well asal 3. It is a test commonly used to test a newly drilled well, since it can only be carried out while a rig is over the hole. Modern well test analysis study a variety of seepage problems of transient testing theory and well test analysis methods.
Professor of petroleum engineering, stanford university. Finding the right technical data guide for conducting these tasks can be daunting, and so renowned petroleum engineer george stewart has written the. A new method to account for producing time effects when drawdown type curves are used to analyze pressure buildup and other test data, spe paper 9289, presented at the 55 th spe annual technical conference and exhibition, dallas, tx, sept. Modern well test analysis is a 5day well test analysis course personally conducted by dr. Jenkins, spe, arco exploration and production technology summary in this paper we present a method to integrate well test, production, shutin pressure, log, core, and geological data to.
Item analysis is useful in helping test designers determine which items to keep, modify, or discard on a given test. Petroleum engineering reference list 2017 page 1 of 3 note. This paper presents multilayer testing and analysis techniques to obtain layer permeabilities and skin factors using flow rate and transient pressure data which was generated into eclipse100 simulation software. The transient test analysis for an injection well with a nonunit mobility ratio is complex and the reservoir should be considered as a composite system earlougher 1977.
This book is also the course test for his popular courses that are taught at the collegiate and continuing levels. For the purpose of this study, we considered commingled reservoir and is defined as the joint production from two or more layers from a single common wellbore. In the presented research, the effect of compact pressure, temperature and porosity on compressibility was investigated. Backed by a wealth of information thanks to modern computerization and big data, well test analysis and design has greatly increased the. Modern well test analysis oil and gas training courses. Identifying the behavior of thermodynamic parameters. This is the superposition principle van everdingen and hurst, 1949. A new method to account for producing time effects when drawdown type curves are used to analyze pressure buildup and other test data, spe paper 9289, presented at the 55 th spe annual technical conference and exhibition, dallas, tx. During the course, the students will be encouraged to use well test software package saphirecrin of kappa engineering. Description of a well test dd i bu p p pt p pt p t. Well test analysis for wells produced at a constant pressure.
Sometimes surface facilities to store the reservoir fluid is not available and hence the fluid is discharged or flared. Hence in many cases well test analysis is synonymous with pressure transient analysis. The pressure transient analysis pta principles derived and the examples discussed in this book are broadly applicable to all types of wells. Horne r modern well test analysis, a computer aided aproach 1. Automated type curve matching, together with nonlinear parameter estimation, are two great modern well test analysis tools made possible by recent advances in computer technology. N modern well test analysisa computeraided ap proach. Behavior of well h16 is related with a heating early because at depth the slope of the pressure line decreases, i. Conventional analysis of pressure drawdownbuildup data c. Please feel free to use the most recent edition of textbooks referenced in this list. In the case of well h9, as can be seen in figure 8, it can be identified that it has a light interval feed between 500 and 650 masl and other. Analysis of pressure buildup test, pressure drawdown test.
It is possible to add several pressure responses, and therefore to describe the well behavior after any rate change. Pet 467 e analysis of well pressure tests 2008 spring. The twolayered testing and analysis techniques are presentend and existing interpretation methods for estimating layer permeabilities. Two features of modern decline analysis that improve upon the traditional. Well test analysis is a critical tool to understand well and reservoir performance. Pore volume compressibility is one of the physical properties of a reservoir that must be specified in many reservoirengineering calculations. Pdf automated well test analysis ii using well test auto. The use of advanced interpretation models, elsevier science, 2002. Horne modern well test analysis a computer aided approach petro way 1995. The well tests conducted in the well kd15 were found to be suitable for the purpose of analysis with such modern interpretation methods. However, a bottleneck in utilizing the pdg data is that the commonly applied well test methods are limited practically to short sections of shutin data only and thus fail to utilize the long term pdg data. Traditional welltest analysis provides good insight into the average proper. The diffusivity equation used to generate the well test analysis solutions is linear.
Results from pta are used as the basis for reservoirscale models and the wellconstrained values for permeability and skin are used to make important decisions such as whether to stimulate and by which method, and assess whether a well will produce at commercial levels. Basic concepts in well testing for reservoir description. In a dst, the well is opened to flow by a valve at the. Recent technology developments have provided the ability for pdgs to measure both flow rate. Horne r modern well test analysis, a computer aided aproach. Horne modern well test analysis a computeraided approach roland n.