Introduction to well testing

Well test objectives exploration well on initial well, confirm hc existence, predict a first production forecast dst. A flowing well is shut in and the pressure change buildup is monitored constant rate assumption during a test is easily achieved zero production. It is anticipated that the course will be 50% classroom based and 50% practical on the various training pads and workshops at elc. An introduction to well drawdown several key terms associated with well drawdown are listed below. Surface test tree, surface safety valve, coflon hose, data header, choke manifold, heat exchanger, 3 phase separator, surge or atmospheric tank, transfer pump, chemical injection pump, emergency shutdown system, burner boomburner head or flare stack, lab container and workshop. The objective is to provide an easy to read introduction to classical well test. Downhole or at surface, well provide the answers to your questions about productivity, fluid properties, composition, flow, pressure, and temperature. As the groundwater education specialist for the center for watershed science and education at the university of wisconsinstevens point, kevin masarik gets a lot of questions from wisconsin residents about their well water and how to go about testing its safety. In the petroleum industry, a well test is the execution of a set of planned data acquisition activities. Psacsait well testing training program introduction. Various types of surface pressure tests usually for gas wells. The procedure is to change the flow of a well and record the pressure variation with time.

Pe401 introduction to well testing and measurement. Introduction to well testing 1 general successful production testing of exploration wells requires the choice of appropriate test string design, equipment and facilities, and strict adherence to safety measures. Fanchi, in integrated reservoir asset management, 2010. Committee members saw a need for an industry standard training course that. Well test interpretation depends on mathematical models. Software testing also helps to identify errors, gaps or missing requirements in contrary to the. Basic concepts in well testing for reservoir description patrick corbett hamidreza hamdi. Successful production testing of exploration wells requires the choice of appropriate test string design, equipment and facilities, and strict adherence to. For the performance testing of water wells, see water well test. Basic concepts in well testing for reservoir description. Successful production testing of exploration wells requires the choice of appropriate test string design, equipment and facilities, and strict adherence to safety measures. The well testing training program was initiated by the well testing committee of the petroleum services association of canada psac. Static level static level is the level of water in a well when no water is being taken from the well by pumps it is usually expressed as the distance in feet or. Ewg applauds introduction of minnesota state water well.

After flowing a well over a stable period via a flow meter test separator meter, orifice place, mpfm, shuttingin the well with a surface or downhole valve for a finite time interval defines a well test. The primary purposes of gas well testing are to determine reservoir. Multiplewell tests these are used to establish communication between wells and determine the interwell reservoir properties. Modern reservoir testing reference number smp7055 schlumberger 1994. During a well test, a transient pressure response is created. Gas well test back pressure, isochronal test, modified. Most well tests consist of changing the rate, and observing the change in pressure caused by this change in rate. Introduction to well testing fundamental and applied. Description of a well test dd i bu p p pt p pt p t. Horizontal well as vertical well with negative skin, in consequence of surface contact area increasing. Introduction to well testing by ned spe student chapter issuu. The streamline well testing interpretation model considering a number of factors was established first, and the numerical well testing simulator, which could consider factors such as reservoir heterogeneity, development well pattern, production history and multiphase fluid, was formed.

It involves execution of a software component or system component to evaluate one or more properties of interest. Introductory well testing by tom aage jelmert download link. According to the well code, all new drinking water wells are required to be sampled for the presence of coliform bacteria prior to being placed into service. Introduction to well testing loglog derivative pressure maintenance noflow boundary mode led. Apr 02, 2019 in this document, well testing is a well production testing job to find out production data from each well oil, water and gas per day. The well owner is ultimately responsible for collecting the samples, and the well contractor is responsible for notifying the well owner of their. Well testing differs from aquifer testing in that the behaviour of the well is primarily of concern in the former, while the characteristics of the aquifer the geological formation or unit that supplies water to the well are quantified in the latter.

Here are a few basic questions i regularly encounter. Analyze well tests in hydraulically fractured wells, horizontal wells, and naturally fractured reservoirs. In this document, well testing is a well production testing job to find out production data from each well oil, water and gas per day. Methods of using type curves are presented to enable the engineer to use, understand, and apply newer type curves as they appear in the literature. Well testing well testing is the process of measuring the changes of production or injection rate and the bottomhole pressure of the testing well, i. Discretization and gridding in reservoir simulation 2. This data is important for petroleum engineers to analyze well and formation as a whole, whether the well is still producing good or requires a well service or workover job to maintain increase the rate of.

Introduction to well testing schlumberger download. Very, very common test so learn about them used to determine formation permeability boundary conditions. Pdf loglog derivative radial flow introduction to well. Introductory well testing 9 preface 1 preface while there are many excellent and important books on the subject of well testing, few provide an introduction to the topic at the very basic level. A short video to present well test analysis, also known as pressure transient analysis, and why we test oil and gas wells from exploration to. To understand this important discipline, well testing experts have developed definitions ranging from average reservoir pressure to dst and well interference testing.

This data is also used to calculate bottomhole pressures 3. The course includes an introduction to well testing equipment and. This chapter discusses a selection of transient well tests for oil wells and gas wells and illustrates how transient well test information is used. Introduction to well testing well testing evaluation. For a producer, pressure at the well builds up during a test. Pe401 introduction to well testing and measurement techniques. During a well test, a transient pressure response is created by. When water is pumped from a well the water level in the well falls. The log may be either geological logs or geophysical logs. Whether your well is an exploration or producing well or you are flowing back after fracturing, reservoir testing improves your reservoir evaluation to confirm the capacity to produce oil and gas. A well test is a set of procedures, performed under specified conditions, to measure the factors affecting the capability of a well for production or injection of fluids and any possible damage.

Loglog derivative radial flow introduction to well testing introduction to well testing introduction to well testing. Surface well testing standard 3 phase package that may consist of. For well testing it is the pressure and the production rate equiva lently, injection rate that are. Identify well test data affected by various wellbore and nearwellbore phenomena. The analysis of gas well testing is based on many of the same principles as those for oil well testing. Well test interpretation course manual written by flopetrol, melun france 1983.

While there are many excellent books on the subject of well testing, few provide an introduction at the very basic level. Introduction well hydraulics is a crucial topic in hydrology, since wells are a hydrologists primary means of studying the subsurface lots of complicated math and analysis, the bottom line is. The acquired data is analyzed to broaden the knowledge and increase the understanding of the hydrocarbon properties therein and. System upgrade on feb 12th during this period, ecommerce and registration of new users may not be available for up to 12 hours. This chapter discusses the quantitative use of type curves in oil well test analysis.

There will also be an introduction to the techniques of nodal. Illustrates the measurement devices used to detect and record pressures during well testing. The introduction to well test interpretation will be kept in a simple form, avoiding complicated mathematical analysis where possible. Pressure measurements recorded near the productive interval form the basis for transient welltest analysis, and are primarily used for determining reservoirrock properties and producingformation limits. Well testing is the execution of the set of activities of planned data acquisition for broadening the understanding and knowledge of the properties of reservoirs containing hydrocarbons. The dst or drill stem test used in both oil and gas wells, in cased or uncased wells. The objective is to provide an easy to read introduction to classical well test theory. The principle of multiplewell testing can also be applied. Introduction to safety concerns, operations and job design.

Additional pressure drop produced by turbulent flow. There are several different kinds of well tests that can be performed during the life history of a well, each with a. Introduction to well testing 2 upon completion of this section, the student should be able to. Streamline numerical well test interpretation, 2011. Introduction on production well testing in upstream oil.

Introduction to well testing by ned spe student chapter. A well is flown at a constant rate and the pressure change decline is monitored derived parameters. Introduction to well testing schlumberger download bok. Introduction to geophysical well logging and flow testing cornel ofwona geothermal development company ltd. The reader is expected to understand basic concepts of flow in porous media. The uncertainty in drainage radius will introduce uncertainty in the estimate of stabilization. Basic concepts in well testing for reservoir description aberdeen.