He has written more than 90 technical papers and two books on the subject of well testing. Analysis types conventional test analyses spherical flow analysis spherical flow analysis when a well is partially penetrating, or partially completed into the formation, the well is connected to the producing interval pay thickness on one fraction of the zone only. Well testing is also known as pressure transient tests. It emphasizes the need for a controlled downhole environment and highperformance gauges both of which have made well testing a powerful reservoir description tool. During a well test, a transient pressure response is created by a temporary change in production rate. The book covers transient well test behavior, descriptive and reservoir well testing, gas well testing. There are a ton of leftovers from the program still remaining in your system and you are not sure of how to get rid of them. Injection well testing is the testing of a well by injecting fluid into the reservoir. This well book summarizes the state of the art in well test interpretation. Welltest virus, malware or adware has been detected. To illustrate the importance of achieving pseudoradial flow during a deliverability test, values of t prf were calculated for a hydraulically fractured well completed in a reservoir with. Saphir offers a comprehensive builtin analytical catalog combining well, reservoir and boundary models, complemented by external models. There is a saying, pay less for testing during software development or pay more for maintenance or correction later.
This technique has been made available by the introduction of scada supervisory. Rate transient analysis rta, also know as advanced decline analysis is a relatively recent development that uses well flowing pressures to characterize well and reservoir properties and estimate inplace volumes. Welltest software helps you conduct gas and oil pressure transient analysis and serves as an everyday well test data interpretation tool. Well test interpretation this well book summarizes the state of the art in well test interpretation. Decipher reservoirflow characteristics and predict future deliverability based on buildup and shortterm drawdown well test information. Test procedures manual american radio relay league. The procedures and principles for analyzing vertical well tests will also be applied to horizontal wells. 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. The diffusivity equation used to generate the well test analysis solutions is linear. Welltest web wizard to help you do a test analysis. Early testing saves both time and cost in many aspects, however. Guide and ihs markit license manager help both links open in a new window tab. Kappa trains and consults in dynamic data analysis. The idea is to create a place where we can learn, share case studies and best practices, and challenge each other.
This flow regime defines radial flow around the multifractured horizontal well mfhw after compound linear flow. All analyses described can be performed using feketes well testing software fastwelltest. Version 2016 v3 sr1 harmony is a well performance analysis environment that houses licensed software products. Oil reservoir pta pressure transient analysis software. Software testing 4 given below are some of the most common myths about software testing. Models for other well components can be used in addition to complete the predicted well performance. Kappa also trains hundreds of engineers every year in client specific inhouse courses and workshops. Pseudotime in buildup testing is evaluated at well flowing pressure not at average reservoir pressure. This model is the most generalized model in feketes suite of analytical. Solving soi is a typical inverse problem gringarten et al. This is based on finite element modeling which is a method of solving partial differential equations in heterogeneous and complex geometry domains. Geologists, drilling engineers, production engineers and reservoir engineers with 15 years experience.
The well testing group is a community of practice to learn well test analysis and deepen our skills, and you are very welcome to join in. It is one of the most important parameter used in production engineering as it could refer to a sick or excited well and leads to additional work over operations. To understand the fundamental principles of well testing 2. When you select harmony, your download includes all the above products. Beginners guide to software testing is our sincere effort to educate and create awareness among people, the growing importance of software quality. A basic requirement for well analysis is the ability to define the entire inflow performance relationship ipr of the well. Calibrating liquid feed pumps summary liquid feeder pumps are used to inject various chemicals needed for effective water and wastewater treatment. The course will deal with both oil and gas well test. The application of numerical welltest analysis solutions has made it possible to model complex cases of bhp analysis. This chapter presents pressure analysis techniques in injection wells. To be able to interpret the results of well test analysis 4. A numerical grid can be used for geometries beyond the scope of analytical models. Very, very common test so learn about them used to determine formation permeability boundary conditions. Since 1981 he has been with fekete associates, a consulting.
Basic surveillance spreadsheet for routine well test analysis free. Jun 04, 2017 test production from the well will most likely need to be routed into the test separator, and then the oil will be sent to a stock tank so it can be measured. Manual testing material by durgasoft linkedin slideshare. The new scalable, collaborative multiuser platform suitable for it environments of all sizes. Well testing determines fluid properties, reservoir pressure, areal extent, flow rates, vertical layering, drawdown pressure, permeability, formation damage, productivity index and much more. Test administration manual printout pdf from website program manual processing request form order form pdf envelopes for returning answer sheets to ets reinforced tape and labels for returning test books to ets test shipment noticepacking slip indicating the number of test books and answer sheets sent. Use diagnostic plots, as well as g function and dfit analyses for. Join the well testing group well test support and elearning. An example of this type of test is a flow after flow deliverability test on a gas well, which is also called a fourpoint or backpressure test. This data is also used to calculate bottomhole pressures 3. The course includes an introduction to well testing equipment and the instrumentation required to control, monitor, measure and sample reservoir fluids produced during a typical well test. Well test interpretation is essentially an inverse problem and in general is better suited to analytical solution.
The dynamic reservoir properties can be measured using a well test. Test production from the well will most likely need to be routed into the test separator, and then the oil will be sent to a stock tank so it can be measured. Basic concepts in well testing for reservoir description. It is characterized as a zero slope on the loglog derivative plot. See the section titled prd user interface design mode for instructions on customizing flowtest to add additional plots and tables. Updated and extended version of the wellknown bfta technical skills manual by andras feketemoro. The dst or drill stem test used in both oil and gas wells, in cased or uncased wells. This tech brief discusses how to calibrate liquid feed pumps. Any new application must be manually tested before its testing can be automated. These are all problems that are the result of improper installation. Currently stanford is recognized as one of the top schools in the world for the study of well test interpretation. Well test web wizard to help you do a test analysis. In most reservoirs, the formation pressure is adequately high to maintain a complete column of fluid in the borehole and track the pressure at the.
With read wells masterybased instruction and builtin progress monitoring, teachers challenge highperforming students to soar, stretch averageperforming students to be better than just average, and help lowperforming students gradually attain grade level. Test administration manual printout pdf from website program manual processing request form order form pdf envelopes for returning answer sheets to ets reinforced tape and labels for returning test books to ets test shipment noticepacking slip indicating the number of. Running numerical models created in welltest 20 v2 v 7. A standard test refers to the simplest form of transient test which assumes the analysis is linear. Accurate well test data must be obtained and the proper ipr applied for successful analysis.
A well test that involves recording pressure versus time to determine how flow rates influence pressure behavior measured in a well mathematical relationships between flow rate, pressure and time are applied to data to infer properties and conditions of the well and reservoir 3 2017 gwpc uic conference petrotek. It is possible to add several pressure responses, and therefore to describe the well behavior after any rate change. Basic surveillance spreadsheet for routine welltest analysis free. When the tests are applicable flow tests can be useful when the reservoir is at uniform pressure, such as when a new well is completed or when a well has been shut in for a lengthy period. Comprehensive assessment stress test manual, august 2014 5. Participants will gain an understanding of the primary objective of surface and downhole well testing which is to assess well productivity. Again, the joinup will be quality assured by the ecb and nca to ensure consistent and accurate application of the methodology. Description of a well test dd i bu p p pt p pt p t. Falloff test is the most common type of test in which pressure decline is determined as the function of time. For a buildup after a single drawdown period at rate q during t p. This is the superposition principle van everdingen and hurst, 1949. Various types of surface pressure tests usually for gas wells. A well test that involves recording pressure versus time to determine how flow rates influence pressure behavior measured in a well mathematical relationships between flow rate, pressure and time are applied to data to infer properties and conditions of the well and reservoir 3 2017 gwpc uic conference petrotek 2017.
Ihs welltest software helps you conduct pressure transient analysis and serves as an everyday well test data interpretation and forecasting tool. With the advent of globalization and increase in market demand for software with good quality, we see the need for all software engineers to know more about software testing. It is used for maintaining test case results by linking defects as well for the failed test cases. The pdf report has missing columns but they are visible in the data table. Agarwalgardner q d and t da definitions are similar to well testing. The following posters from fekete associates can serve as cheat sheets. Calibrating these pumps helps control and optimize feeding rates, which in turn provides better water quality at a lower cost. Manual testing is a type of software testing where testers manually execute test cases without using any automation tools. It highlights the problem faced in deciding on the correct time function to be used in pressure transient analysis. The course will deal with both oil and gas well test interpretation, drillstem tests. Agip division organising department type of activity issuing dept. Horizontal radial flow can be observed during the middle time region, after the radius of investigation r inv has expanded well beyond the length of the wellbore.