Introduction to well testing

Introduction to well testing by ned spe student chapter. Introduction to safety concerns, operations and job design. Additional pressure drop produced by turbulent flow. Fanchi, in integrated reservoir asset management, 2010. Introductory well testing by tom aage jelmert download link. 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. This chapter discusses the quantitative use of type curves in oil well test analysis. The objective is to provide an easy to read introduction to classical well test theory. The principle of multiplewell testing can also be applied.

Basic concepts in well testing for reservoir description aberdeen. The log may be either geological logs or geophysical logs. Introduction to well testing fundamental and applied. Multiplewell tests these are used to establish communication between wells and determine the interwell reservoir properties. Very, very common test so learn about them used to determine formation permeability boundary conditions. The primary purposes of gas well testing are to determine reservoir. The acquired data is analyzed to broaden the knowledge and increase the understanding of the hydrocarbon properties therein and.

Loglog derivative radial flow introduction to well testing. The dst or drill stem test used in both oil and gas wells, in cased or uncased wells. Successful production testing of exploration wells requires the choice of appropriate test string design, equipment and facilities, and strict adherence to. During a well test, a transient pressure response is created.

Natural fractured reservoir engineering phdg textbooks in preparation, intended to be issued during 2015. Pe401 introduction to well testing and measurement techniques. 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. Well test interpretation depends on mathematical models. The course includes an introduction to well testing equipment and. It is anticipated that the course will be 50% classroom based and 50% practical on the various training pads and workshops at elc. Introduction to well testing 2 upon completion of this section, the student should be able to. The reader is expected to understand basic concepts of flow in porous media. 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. Psacsait well testing training program introduction.

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 that ow tofrom a well in an extensive aquifer is radial, and can be approximated by analytic solutions to ow equation in radial coordinates. Description of a well test dd i bu p p pt p pt p t. Identify well test data affected by various wellbore and nearwellbore phenomena. 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. 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. A flowing well is shut in and the pressure change buildup is monitored constant rate assumption during a test is easily achieved zero production. The introduction to well test interpretation will be kept in a simple form, avoiding complicated mathematical analysis where possible.

Well test interpretation course manual written by flopetrol, melun france 1983. Discretization and gridding in reservoir simulation 2. There will also be an introduction to the techniques of nodal. Pe401 introduction to well testing and measurement. Surface well testing standard 3 phase package that may consist of. 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. Most well tests consist of changing the rate, and observing the change in pressure caused by this change in rate. Introduction to well testing outline applications and objectives of well testing development of the diffusivity equation definitions and sources for data used in well testing what is a well test.

The uncertainty in drainage radius will introduce uncertainty in the estimate of stabilization. Illustrates the measurement devices used to detect and record pressures during well testing. Introduction on production well testing in upstream oil. The procedure is to change the flow of a well and record the pressure variation with time. 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. Well test objectives exploration well on initial well, confirm hc existence, predict a first production forecast dst.

To understand this important discipline, well testing experts have developed definitions ranging from average reservoir pressure to dst and well interference testing. In the petroleum industry, a well test is the execution of a set of planned data acquisition activities. When water is pumped from a well the water level in the well falls. The well testing training program was initiated by the well testing committee of the petroleum services association of canada psac.

Modern reservoir testing reference number smp7055 schlumberger 1994. The well owner is ultimately responsible for collecting the samples, and the well contractor is responsible for notifying the well owner of their. While there are many excellent books on the subject of well testing, few provide an introduction at the very basic level. 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. 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. Pdf loglog derivative radial flow introduction to well. Downhole or at surface, well provide the answers to your questions about productivity, fluid properties, composition, flow, pressure, and temperature. An introduction to well drawdown several key terms associated with well drawdown are listed below. 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. 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.

Gas well test back pressure, isochronal test, modified. Software testing also helps to identify errors, gaps or missing requirements in contrary to the. Introduction to well testing well testing evaluation. 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. 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.

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. Define, give the units for, and specify typical sources for each of the following variables. 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. 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 meters from the ground surface to the water level. It involves execution of a software component or system component to evaluate one or more properties of interest. Analyze well tests in hydraulically fractured wells, horizontal wells, and naturally fractured reservoirs. During a well test, a transient pressure response is created by. For the performance testing of water wells, see water well test. Introduction to well testing loglog derivative pressure maintenance noflow boundary mode led. To perform a well test successfully one must be able to measure the time, the rate, the pressure, and control the rate. For well testing it is the pressure and the production rate equiva lently, injection rate that are.

The objective is to provide an easy to read introduction to classical well test. 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. 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. Here are a few basic questions i regularly encounter. This chapter discusses a selection of transient well tests for oil wells and gas wells and illustrates how transient well test information is used. Horizontal well as vertical well with negative skin, in consequence of surface contact area increasing. System upgrade on feb 12th during this period, ecommerce and registration of new users may not be available for up to 12 hours. Committee members saw a need for an industry standard training course that. Basic concepts in well testing for reservoir description.

Introduction to well testing by ned spe student chapter issuu. A well is flown at a constant rate and the pressure change decline is monitored derived parameters. 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. Introduction to well testing schlumberger download. Donohue introduces the theory of pressuretransient analysis. For a producer, pressure at the well builds up during a test. Basic concepts in well testing for reservoir description patrick corbett hamidreza hamdi. There are several different kinds of well tests that can be performed during the life history of a well, each with a. 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. Ewg applauds introduction of minnesota state water well. The analysis of gas well testing is based on many of the same principles as those for oil well testing. Various types of surface pressure tests usually for gas wells. Introduction to well testing schlumberger download bok.