It is rather easy to measure the length and diameter of a pipe and compute its. Well test interpretation depends on mathematical models. Introduction to geophysical well logging and flow testing cornel ofwona geothermal development company ltd. An introduction to psychometric tests you are most likely to encounter psychometric testing as part of the recruitment or. The information you provided does not match our records. To be able to interpret the results of well test analysis 4. Basic concepts in well testing for reservoir description aberdeen. Hopefully, this book will give the reader a useful introduction to a. An introduction to well integrity introductory material for drilling people based on norsok d010 and olf 117 objective is to introduce well integrity early and establish as a basis for all work the compendium is a prerequisite for the standards, separate training in the standards must be done later. Loglog derivative radial flow introduction to well testing introduction to well testing introduction to well testing.
Iskander diyashev is a director and a cofounder of petroleum and energy technology advisors, inc. Introduction to pressure transient analysis free download as powerpoint presentation. Petropedia explains well testing well testing determines fluid properties, reservoir pressure, areal extent, flow rates, vertical layering, drawdown pressure, permeability, formation damage, productivity index and much. Introduction to hypothesis testing sage publications. This chapter discusses a selection of transient well tests for oil wells and gas wells and illustrates how transient well test information is used. The decision to case and cement a well for production or plug and abandon it as a dry hole relies heavily on formation evaluation fe using openhole.
Hypothesis testing or significance testing is a method for testing a claim or hypothesis about a parameter in a population, using data measured in a sample. The priorities of the wells team are to maintain well integrity, avoid hurting anyone and deliver the well on time and in budget. Well test objectives exploration well on initial well, confirm hc existence, predict a first production forecast dst. Introduction to well testing loglogderivative pressure maintenance noflow boundarymode led re servo ir areac4. Introduction to well testing by ned spe student chapter. The introduction to well test interpretation will be kept in a simple form, avoiding complicated mathematical analysis where possible. 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.
Analyze well tests in hydraulically fractured wells, horizontal wells, and naturally fractured reservoirs. Well test data is fundamental to the understanding and effective management of oil and gas wells. Well test objectives the objectives of a well test usually fall into three major categories. Principle of well testing azmi mohdarshad department of petroleum engineering well test interpretation skm4323. Discretization and gridding in reservoir simulation 2. Basic concepts in well testing for reservoir description. Well test analysis for wells produced at a constant pressure. This data is also used to calculate bottomhole pressures 3. The diffusivity equation used to generate the well test analysis solutions is linear.
You can expect to find all of the following types of question in a typical mechanical aptitude test. The dst or drill stem test used in both oil and gas wells, in cased or uncased wells. 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. It will consist of some theoretical classroom sessions conducted with experienced professional providing presentations of well testing equipment, procedures and operations. Wireline tractor introduction mechanical services introduction. Additional pressure drop produced by turbulent flow. Introduction to well testing by ned spe student chapter issuu. The drake well was located in the middle of quiet farm country in northwestern pennsylvania, and sparked the international search for an industrial use for petroleum. The log may be either geological logs or geophysical logs. The objective is to provide an easy to read introduction to classical well test theory. Constructing and maintaining a well is a team effort involving many people with different skills every individual is important. In fact, the production test can be performed either through a temporary completion string made up of dst down hole tools or through the final permanent completion string. Define, give the units for, and specify typical sources for each of the following variables.
Well testing determines fluid properties, reservoir pressure, areal extent, flow rates, vertical layering, drawdown pressure, permeability, formation damage, productivity index and much more. 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. Well testing requires the right technology, planning and implementation in order to gather information about a particular well. Introduction to well testing well testing evaluation. To understand the fundamental principles of well testing 2. An operation carried out on an oil or gas well to extend its producing life by. In this method, we test some hypothesis by determining the likelihood that a sample statistic could have been selected, if the hypothesis regarding the population parameter were true. It is possible to add several pressure responses, and therefore to describe the well behavior after any rate change.
Various types of surface pressure tests usually for gas wells. The course includes an introduction to well testing equipment and. Well testing and reporting requirements guide bc oil and gas. A pumping test is a field experiment in which a well is pumped at a controlled rate and waterlevel response is measured in one or more surrounding observation wells and optionally in the pumped well control well itself. Successful production testing of exploration wells requires the choice of appropriate test string design, equipment and facilities, and strict adherence to safety measures. Well testing flow tests well testing is possible because pressure and flow rate can easily be measured in a well and an analysis of the measurement history reflects reservoir parameters. Committee members saw a need for an industry standard training course that. To understand this important discipline, well testing experts have developed definitions ranging from average reservoir pressure to dst and well interference testing. The driver behind every well completion strategy, whether for a complex or basic well, is to recover, at a reasonable cost, as large a percentage of the original oil in place ooip as possible.
Pdf basic concepts in well testing for reservoir description. Not only are evergreen subjects, such as layered reservoirs, naturally fractured reservoirs, and wellbore effects, covered in depth, but newer developments, such as well testing for horizontal wells, are. Well testing and interpretation for horizontal wells article pdf available in journal of petroleum technology 471. The course includes an introduction to well testing equipment and the instrumentation required to control, monitor, measure and sample reservoir fluids produced.
Identify well test data affected by various wellbore and nearwellbore phenomena. The well test which we will use in this program is the. Drinking water quality testing section 1 introduction 1 1 introduction to drinking water quality testing having safe drinking water and basic sanitation is a human need and right for every man, woman and child. Oil well testing handbook is a valuable addition to any reservoir engineers library, containing the basics of well testing methods as well as all of the latest developments in the field.
To perform a well test successfully one must be able to measure the time, the rate, the pressure, and control the rate. Pressure response for an interference test it is possible to produce periodically from the active well, as shown in figure, i. Instead, a portable test unit consisting of a separator, meters, and storage tanks are brought to the well site for the test. 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. The reader is expected to understand basic concepts of flow in porous media. It is anticipated that the course will be 50% classroom based and 50% practical on the various training pads and workshops at elc. Psacsait well testing training program introduction. Not only are evergreen subjects, such as layered reservoirs, naturally fractured reservoirs, and wellbore effects, covered in depth, but newer developments. The dynamic reservoir properties can be measured using a well test. Well test in most well tests, a limited amount of fluid is allowed to flow from the formation being tested. Basic concepts in well testing for reservoir description patrick corbett hamidreza hamdi. An introduction to well drawdown several key terms associated with well drawdown are listed below. People need clean water and sanitation to maintain their health and dignity.
Mechanical reasoning designed to assess your knowledge of physical and mechanical principles. An introduction to well intervention spe aberdeen monthly evening meeting jim wright. Pdf loglog derivative radial flow introduction to well. The pressure changes in the observation well are very small, but can still be recorded by a differential manometer. Very, very common test so learn about them used to determine formation permeability boundary conditions. Introduction to well testing introduction to well testing instructional objectives 1. Geologists, drilling engineers, production engineers and reservoir engineers with 15 years experience. An operation carried out on an oil or gas well to extend its. Horizontal well as vertical well with negative skin, in consequence of surface contact area increasing. Natural fractured reservoir engineering phdg textbooks in preparation, intended to be issued during 2015. Static one time measurement last the duration of a well test continuous e. 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.
Many designs of well test strings are possible depending on the requirements of the test and the nature of the well and the type of flow test to be conducted. Halliburton provides surface well testing services and products including planning, specialized equipment, and monitoring and measurement of all factors relating to the production of oil, gas, and water at a well site. This is the superposition principle van everdingen and hurst, 1949. Introductory well testing by tom aage jelmert download link. Aberdeen wednesday 6th april 2011 1 introduction 2 description of a well test flow rate. Fundamentals of well testing operations elc the course will be held at schlumbergers european learning center elc training facility in melun, france. In addition, all waste oil shall be disposed of in a manner which will not create a fire hazard 6nycrr part 556. Pdf well testing and interpretation for horizontal wells. Introduction to well testing 2 upon completion of this section, the student should be able to. For well testing it is the pressure and the production rate equiva lently, injection rate that are. Drake well museum collection, titusville, pa these wells were shallow by modern standards, often less than 50 meters. The operation of any well, lease or unit shall be such as to keep each well location and unit installation free of rubbish, debris, dead grass, brush, weeds, and other flammable material. Introductory well testing 4 contents contents 1 preface9 2 introduction 10 3 productivity of wells 11 3. Most well tests consist of changing the rate, and observing the change in pressure caused by this change in rate.
The length of the test, usually numbered in hours, is limited by available storage. 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. The well testing training program was initiated by the well testing committee of the petroleum services association of canada psac. Results show that of the two properties, permeability had the most sensitized effect on the rate of oil well production. 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. During a well test, a transient pressure response is created by a temporary. It gives information on the types and properties of fluids in the formation, indicates the presence of hydrocarbons, and provides information on the pressures of the fluids within the formation. The formation is isolated behind cemented casing and perforated at the formation depth or, in openhole, the formation is straddled by a pair of packers that isolate the formation. 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. During a well test, a transient pressure response is created by. Introduction to well testing loglog derivative pressure maintenance noflow boundary mode led.
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