An investigation of recent deconvolution methods for well. This tec hnique is tailored to improve bo th the performance and accuracy of well te st. Hydraulics of wells and well testing philippe renard. Handbook of petroleum exploration and production, 3 bourdet, dominique on. A thesis in the requirements for the degree of master of. The well test data is then smoothed using numerical methods and the derivative curve subsequently calculated. A well is flown at a constant rate and the pressure change decline is monitored derived parameters. Well test analysis ebook by dominique bourdet rakuten kobo. To understand the fundamental principles of well testing 2.
Read well test analysis the use of advanced interpretation models by dominique bourdet available from rakuten kobo. Most figures presented in this set of course notes are extracted from well test analysis. Understanding diagnostic plots for welltest interpretation. Deconvolution is a technique for well test interpretation. Hydraulics of wells and well testing philippe renard university of neuchatel, neuch. This is the superposition principle van everdingen and hurst, 1949. The use of advanced interpretation models, elsevier. 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.
The program compares the type curve to the smoothed well test data and derivate curve of the data. The combined plot of log pressure change and log derivative of pressure change with respect to superposition time as a function of log elapsed time was first introduced by bourdet et al. Estimate put and its derivative dpud ln t from the data 2. The multirate test of af21 consists of a welltest sequence 4 distinct step rate changes and one shutin period acquired over a 16hour test. A standard test refers to the simplest form of transient test which assumes the analysis is linear. The use of advanced interpretation models volume 3 handbook of petroleum exploration and production volume 3 bourdet, dominique on. Groundwater hydrologists use derivative analysis to identify important flow regimes encountered during a pumping test, detect aquifer boundaries and select. Pdf understanding diagnostic plots for welltest interpretation. Well test analysis and interpretation techniques are problematic since there is a variety of alternative methods. Bayesian deconvolution of oil well test data using. Handbook of petroleum exploration and production, 3. With todays powerful graphic and computing facilities, the characteristic features of the many different types of wells.
These works offer new solution methods to the longstanding deconvolution problem and make deconvolution a viable tool for well test and productiondata. Pressure transient analysis, or pta, is, in most cases, about analyzing high frequency, high resolution shutin data. Understanding diagnostic plots for welltest interpretation article pdf available in hydrogeology journal 173. Well test analysis can directly determine the degree of damage, using the value of skin factor s and various. Well test analysis the use of advanced interpretation models details after a presentation of the various interpretation techniques proposed by all well test interpretation computer programs straight line methods, pressure curve analysis, pressure derivative method, the advantages and limitations of the different approaches are discussed. The use of advanced interpretation models volume 3 handbook of petroleum exploration and production volume 3. H 0 is the difference between the pre test level and the highest level immediately after insertion of the slug, h is the difference between the pre test level and the level at some time t after the insertion of the slug. Principles of transient testing, analysis methods, wellbore con. During a well test, a transient pressure response is created by. So this tool was designed for free download documents from the internet. Well testing and well hydraulics play a major role in applied hydrogeology. Derivative analysis is an invaluable tool for diagnosing of a number of distinct flow regimes. These works offer new solution methods to the longstanding deconvolution problem and make deconvolution a viable tool for welltest and productiondata. When a well test contains a series of different flow rates, or a continuously varying flow rate, the.
The scope o f this work i s to present a new tech niquemethod for auto mating well test analysis. The user enters the well test data and appropriate reservoir and production parameters. Welltest analysis and interpretation techniques are problematic since there is a variety of alternative methods. A thesis in the requirements for the degree of master of science. Use of the pressure derivative for diagnosing pressure. Production testing development well on production well, satisfy need for well treatment. Principles of transient testing, analysis methods, wellbore conditions, effect of reservoir heterogeneities on well responses, effect of reservoir boundaries on well responses, multiple well testing, application. Figure 2 presents the pressure and rate data for this welltest sequence note that a single pressure buildup profile of about. Examples of flow regimes that one may discern with derivative analysis include infiniteacting radial flow, wellbore storage, linear flow, bilinear flow, interporosity flow and boundaries. A numerical grid can be used for geometries beyond the scope of analytical models. Wan renpu, in advanced well completion engineering third edition, 2011. The methodologies described in the course, which have become the standard of the industry, will present the systematic way of interpreting well tests. During a well test, a transient pressure response is created by a temporary change in production rate. About us we believe everything in the internet must be free.
Well test analysis is the main method of onsite fieldevaluation of well completion quality in oil and gas wells. Geologists, drilling engineers, production engineers and reservoir engineers with 15 years experience. Well testing and interpretation free in pdf format. Well test and pta for reservoir characterization of key. It allows the reconstruction of a constant rate drawdown response for all production and shutin periods combined gringarten, 2008. Analysis of well tests in afyon omergecek geothermal field. Saphir offers a comprehensive builtin analytical catalog combining well, reservoir and boundary models, complemented by external models. Well test analysis for wells produced at a constant pressure. This book on well test analysis, and the use of advanced interpretation models is volume 3 in the series handbook of petroleum exploration and production. Well test analysis is a critical tool to understand well and reservoir performance. The causes and degrees of formation damage can be evaluated. Well test objectives exploration well on initial well, confirm hc existence, predict a first production forecast dst. The analysis of this type of data in reservoir characterization by.
Derivative analysis is powerful diagnostic tool that enhances the interpretation of data from pumping tests. Bourdet, handbook of petroleum exploration and production 3, elsevier science, 2002. Deconvolution and interpretation of well test data masked by wellbore storage in a build up test 1akintola a. Well test pressure transients tim whittle bg group society of petroleum engineers distinguished lecturer program. Features difficult to discern in drawdown data alone are often readily apparent through the application of the derivative procedure. Spe distinguished lecturer program primary funding is provided by. A flowing well is shut in and the pressure change buildup is monitored constant rate assumption during a test is easily achieved zero production. Well test analysis by dominique bourdet overdrive rakuten. Introduction to pressure transient analysis fluid dynamics.
For a buildup after a single drawdown period at rate q during t p. H 0 is the difference between the pretest level and the highest level immediately after insertion of the slug, h is the difference between the pretest level and the level at some time t. Description of a well test dd i bu p p pt p pt p t. This course will enable participants to understand the fundamental concepts of well test analysis. Deconvolution and interpretation of well test data masked. 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. Well test analysis an overview sciencedirect topics. While well hydraulics aims at modeling the groundwater behavior in response to a perturbation such as pumping in a well, well testing.
Well test analysisthe use of advanced interpr by siu. Estimation of hydraulic conductivity using the slug test. After a presentation of the various interpretation techniques proposed by all well test interpretation computer programs straight line methods, pressure curve analysis, pressure derivative method, the advantages and limitations of the different approaches are discussed. It is possible to add several pressure responses, and therefore to describe the well behavior after any rate change. Pressure transient data analysis of fractal reservoir with. Figure 2 presents the pressure and rate data for this well test sequence note that a single pressure buildup profile of about 4 hr is acquired at the end of the testing sequence. Basic concepts in well testing for reservoir description. To be able to interpret the results of well test analysis 4. Use of the pressure derivative for diagnosing pressuretransient behavior c. Introduction to pressure transient analysis free download as powerpoint presentation.
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