Typecurve analysis consists of finding a type curve that matches the actual response of the well and the reservoir during the test. Engineers, geoscientists and analysts are faced with an everincreasing number of wells to analyze, and often need to collaborate with others so that a confident final interpretation of well performance can be delivered. Aqtesolv pioneered the integration of visual and automatic curve matching methods into a single software package for the analysis of aquifer test data oneclick matching. 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. Well test analysis software allow understanding well and reservoir production potential. Introduction the purpose of this paper is to introduce new type curves and type curve plotting functions that allow unique analysis of noisy well test data. The following is a summary of the type curve models available in the pie well test analysis software. Automated type curve matching in well test analysis in. Presented at the spe annual technical conference and exhibition, dallas, texas, 2124 september 1980.
Loglog plot or derivative plot in well test analysis. Originally, typecurve analysis was done manually using only the pressure change. In such cases, type curve analysis can provide approximate results. Production decline curve an overview sciencedirect topics. Although the automated typecurvematching technique is often an improvement over. The original fetkovich type curves were developed for constant or only slightly changing downhole pressures and were used to estimate the drainage area and the decline parameter. Laplace or fourier transforms, bessel functions, etc. An excel tool for teaching theis method of estimating aquifer. The following is a summary of the typecurve models available in the pie welltest analysis software. This can be performed by making a copy of the type curve, and cha nge the date series to drawdown data. Such a program will shorten the analysis turnaround time and. The type curves are used to properly analyze a test or to doublecheck the results obtained with conventional methods with those obtained with type curve matching. A new method to account for producing time effects when drawdown type curves are used to analyze pressure buildup and other test data.
With the company growing at a rate of over 50% per month and a free trial to subscriber conversion rate of over 60%, the product is quickly capturing market share. Aquifertest is an easytouse software package for analyzing, interpreting and visualizing pumping and slug test data. The new scalable, collaborative multiuser platform suitable for it environments of all sizes. Type well analysis improves decline curve estimation. The time since test initiation and the normalized head are then automatically plotted on chart 3 along with the type curve generated in spreadsheet type curve generator. An excel tool for teaching theis method of estimating. Drillnomics released its oil and gas economic evaluation and decline curve software to the public this quarter, and industry response has been overwhelmingly positive. The power of tds technique for well test interpretation. Engineers, geoscientists and analysts are faced with an everincreasing number of wells. Well test analysis an overview sciencedirect topics. Unlike any other oil and gas surveillance activity, a pressure transient test provides information about. The common link between the two sections is the exponential decline curve.
Yearonyear stability in remaining proveddeveloped reserves 1p is the most positive impact of applying a consistent type well approach to. Then, the nonhomogeneous equations exact solution in laplace space of the model are acquired by using theory of laplace transform and bessel function,then the chart of type curve and the matching. Designed by hydrogeologists for hydrogeologists, aquifertest delivers all the tools. Fluid flow in naturally fractured reservoirs petrowiki.
Aqtesolv aquifer test solver is the worlds leading software for pumping tests, slug tests, constanthead tests, groundwater mounding and more. Well test analysis design and analyze pressure transients with ease. Automated type curve matching in well test analysis. Manual typecurve analysis for well in naturally fractured reservoirs is tedious, and the interpretation involved is difficult. Pansystem well test analysis softwarepansystem software has been the. Automated typecurve matching in well test analysis using. Well test software tools help to undergo gas and oil well pressure transient analysis and interpretation. The models are grouped by type with each type containing one or more related models. To be able to interpret the results of well test analysis 4. The most common limitation of pumping test analysis software packages has been that it is often very difficult andor tedious to get the pumping test or slug test data into the program.
The software is based on pressure derivative plots, but conventional methods such as type curve matching and straight line analysis are available as well. Aug 17, 2015 drillnomics released its oil and gas economic evaluation and decline curve software to the public this quarter, and industry response has been overwhelmingly positive. Saphir includes an interference test type, where the pressure response of an observation well is used. Well test analysis is a critical tool to understand well and reservoir performance. Decline curves phdrms overview blueback toolbox plugin for. The slug test acquisition software included with the gw1600 kit is loaded on a portable computer and used to observe and acquire slug test data in the field. An automatic typecurvematching computer program offers a means to alleviate the parameteradjustment phase of well test analysis. Petroleum engineers, landmen, royalty owners, prospectors, and everyone in between can. The shapes of the diagnostic plots for a buildup test and a drawdown test are essentially identical during the early and middletime regions for most tests. If your connection is slower, you will want to download the files separately. The appropriate type curve for the analysis is determined through iterative curve generation and comparing the trough and peak values of the theoretical and actual normalized.
Aqtesolv aktesolv is the worlds leading software for the design and interpretation of aquifer tests pumping tests, slug tests, constanthead tests in confined, leaky, unconfined and fractured aquifers. If the type curve is slightly displaced 1 mm an error of about 200 psi is. The type curve analysis method is simple, fast, and accurate when the exponential integral p d applies, that is, when r d rr w 20 and t d r d 2 0. Finally, fetkovich developed a set of relatively complete loglog production decline type curve matching methods similar to those for well test analysis. High resolution pressure versus time data derived from drill. Such a program will shorten the analysis turnaround time and improve the quality of interpretation. High resolution pressure versus time data derived from drill stem tests dst, production tests, permanent down hole gauges pdg, etc will be used for further analysis. On day four of this course, participants will learn about well test analysis in gas and gas condensate reservoirs.
With the software provided welltest analysisdrawdownzz, vary the. Pdf automatic type, curve matching for well test analysis. Multiple analysis options are available to analyze test periods which include multiple straight line analyses techniques, horner, infinite acting radial flow, pseudosteady state, radial superposition, fracture linear flow, fracture bilinear flow, and spherical flow, automatic type curve matching using non linear regression, and manual type. Well test software tools help to undergo gas and oil well pressure transient. All of these models are computed by using a full analytic solution with the appropriate techniques e. The pressure measurement points of well s6j3 were subject to the influence of the ambient temperature and they fluctuated or jumped to some extent. For a buildup after a single drawdown period at rate q during t p. To understand the fundamental principles of well testing 2. Tabulated typecurve data not a complete set, draw down data, plotted typecurve and drawdown curve in microsoft office excel 2007 x plot the drawdown curve with the same size and. A variety of type curve analysis methods ranging from simple drawdown type curves to multi well type curve simulation. Well test analysis in gas and gas condensate reservoirs. Saphir includes an interference test type, where the pressure response of an observation well is used for the analysis.
Aqtesolv pioneered the integration of visual and automatic curvematching methods into a single software package for the analysis of aquifer test data oneclick matching. Normalized type curve analysis rate vs time provides a consistent comparison tool for production. Oneclick matching allows you to just point, click and drag to match a type curve or line to your data. This is a very powerful tool that allows us to visualize the flow behaviour around the. Today, commercial software can generate the type curve families on the computer screen, enabling a much more flexible and userfriendly analysis. A method for quantifying well and reservoir parameters such as permeability, skin, fracture halflength, dualporosity parameters, and others, by comparing the pressure change and its derivative of the. Type curve matching techniques may be used for drawdown, buildup, interference, and constant pressure testing. Automatic type, curve matching for well test analysis article pdf available in spe formation evaluation 33. Quick decline production oil and gas decline analysis. Fundamentally, a type curve is a preplotted family of pressure drawdown curves generated by obtaining solutions to the flow equations with specified initial and boundary conditions. An extensive set of typecurve models that cover a wide range of well and reservoir systems. Loglog plot or derivative plot in well test analysis youtube. It is possible to add several pressure responses, and therefore to describe the well behavior after any rate change.
The analysis of welltest data by automated typecurve match by use of computers is a subject of current interest. Match model parameters to data by regression steps 24 are well understood. A method for quantifying well and reservoir parameters such as permeability, skin, fracture halflength. Pdf typecurve analysis using the pressure integral method. Jan 20, 2014 this video presents one of the well testing tools. The following is a summary of the typecurve models available in the pie well test analysis software. Selection of slug test response data segment for type curve or line fitting. Well test analysis software allow understanding well and reservoir production potential at the early stage of field exploration and development. Originally, type curve families were printed on specialized usually loglog coordinates with dimensionless parameters defining the x and y axes. The analysis of well test data by automated type curve match by use of computers is a subject of current interest. Rosalind archer, iskander diyashev, john spivey this course stresses practical. Aquifertest for windows is the first pumping test and slug test analysis software package to combine an intuitive and intelligent windows interface for convenient data entry with graphical data analysis tools and reportquality graphical output capabilities.
Automatic type, curve matching for well test analysis. An extensive set of type curve models that cover a wide range of well and reservoir systems. Imprint 1983 physical description xii, 228 leaves, bound. Fetkovich recognized that decline curve analysis was only applicable during the depletion period ie. The conventional type curve analysis method was used to interpret the aforementioned interference test data. Automatic type, curve matching for well test analysis onepetro. Geologists, drilling engineers, production engineers and reservoir engineers with 15 years experience. The slug test analysis sta software is a simple, userfriendly software package designed for use with slug test data. So what is the problem with production type curves. Oil and gas well testing and rate transient analysis ihs. The fetkovich plot displays the rate and cumulative volume data against the elapsed time on a loglog scale.
For single well testing, type curve matching should be used only when conventional analysis techniques such as those illustrated in chapter 5 cannot be used. Furthermore, fetkovich combined the production decline curve and the arps rate decline equation, to intuitively show the production decline regularity and the boundary effect. When a match is found between data and a type curve, the parameters that. Tabulated type curve data not a complete set, draw down data, plotted type curve and drawdown curve in microsoft office excel 2007 x plot the drawdown curve with the same size and scal e as the type curve. Multiple analysis options are available to analyze test periods which include multiple straight line analyses techniques, horner, infinite acting radial flow, pseudosteady state, radial superposition. Paradigm interpret well test analysis software is used for the design and analysis of pressure transients, from either traditional production and drillstem tests dst, or from wireline formation tests wft and testingwhiledrilling twd operations, conducted on exploration, appraisal or production wells. Kgsofr 200040simple procedures for analysis of slug tests. New oil and gas economic and decline curve software tool is.
The diffusivity equation used to generate the well test analysis solutions is linear. When communication exists, reservoir parameters can be obtained similar to that of a typical pta test. Typewell analysis improves decline curve estimation. A variety of typecurve analysis methods ranging from simple drawdown type curves to multiwell typecurve simulation. A new set of type curves simplifies well test analysis. David has provided training internationally in well testing and pressure transient analysis well test interpretation for clients including kappa engineering, ifp training, total and petrotech.
Aquifertest for windows pumping test and slug test analysis. Ihs consultants combine well tests pressure transient and decline analysis rate transient to help upstream professionals understand shale reservoirs. Although the automated type curve matching technique is often an improvement over conventional methods, there are certain practical problems that occur in its application. Estimate put and its derivative dpud ln t from the data 2. Typewell analysis improves decline curve estimation oil. Yearonyear stability in remaining proveddeveloped reserves 1p is the most positive impact of applying a consistent typewell approach to. Originally, typecurve families were printed on specialized usually loglog coordinates with dimensionless parameters defining the x and y axes.
New oil and gas economic and decline curve software tool. Nonlinear regression to adjust all of the parameters for a type curve model to obtain the best fit to the analysis data. This is the superposition principle van everdingen and hurst, 1949. Quick decline is the ultimate production oil and gas decline analysis and economic evaluation tool for everyone. For single well testing, type curve matching should be used only when conventional analysis. The slug test analysis sta software is a simple, userfriendly software package designed for use with slug test data obtained with the geoprobe systems gw1600 pneumatic slug test kit. The earlytime portion is derived from transient flow equations which come from the field of well test analysis, whereas the latetime portion consists simply of the arps typecurve. A method for quantifying well and reservoir parameters such as permeability, skin, fracture halflength, dualporosity parameters, and others, by comparing the pressure change and its derivative of the acquired data to reservoir model curve families, called type curves. An automatic type curve matching computer program offers a means to alleviate the parameteradjustment phase of well test analysis. Nonlinear regression to adjust all of the parameters for a typecurve model to obtain the best fit to the analysis. Type curve analysis consists of finding a type curve that matches the actual response of the well and the reservoir during the test.
Once the proper reservoir model has been determined, test analysis may be relatively straightforward type curve matching or regression analysis using modern well test analysis software. Jun 23, 2015 david has provided training internationally in well testing and pressure transient analysis well test interpretation for clients including kappa engineering, ifp training, total and petrotech. The analysis can be extended to include numerical and nonlinear if required. The reservoir and well parameters, such as permeability and skin. Aquifertest for windows pumping test and slug test. The match can be found graphically, by physically, superposing.