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Injection Fall-off (IFO) testing - PetraCat

Injection Fall off (IFO) testing Injection Fall off (IFO) testing DFIT, Frac Monitoring, Surface Pressure Transient Testing Injection fall off testing Injection fall off (IFO) testing typically refers to testing done in either Water disposal wells or ...

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World Geothermal Congress Abstract - pangea.stanford.edu

A new numerical PTA framework using the TOUGH2 simulator (Pruess, Oldenburg, & Moridis, 1999) was developed to analyse wells with such a typical behaviour. The approach was applied to a case study in Belgium (well MOL-GT-03) for which extended injection-fall-off well test data were analysed.

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(PDF) SPE 169539 DFIT Mistakes Misfires Misdiagnoses ...

These tests seek to approach a matrix injection/falloff test and should not be considered as valid diagnostic fracture injection tests as the information critical to fracture design will all be compromised. Another failing of the low rate test is that the height of the zone contacted will rarely SPE 169539 11 (in the real world that means ...

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Injection Well Pressure Transient Testing - advntk.com

A pressure falloff test is usually preceded by a long injectivity test. Injection is then stopped while recording pressure. Therefore, a pressure falloff test is similar to a pressure buildup test, but only if the properties of the injected and reservoir fluids are the same. In some falloff tests, the pressure at the wellhead goes on vacuum.

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Chapter 14: Injection Well Transient Testing and Analysis ...

14.1 Introduction. This chapter presents pressure analysis techniques in injection wells. The injectivity test and the fall-off tests are used to estimate the reservoir properties of injection wells in waterflood and tertiary recovery projects.

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FACTSHEET FOR PARTNERSHIP FIELD VALIDATION TEST

Three coal zones were individually through pressure-transient injection-falloff tests using a total of 278 tons of CO2 (about 93 tons per coal zone). Coal seams at the test site can sequester more than 1,740 tons of CO2 per acre (30 million scf/acre). Therefore, this project affected only the area immediately surrounding the coalbed methane well.

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A Two-Phase Flow Model for Pressure Transient Analysis of ...

The pressure injection falloff test for water injection well has the advantages of briefness and convenience, with no effect on the oil production. It has been widely used in the oil field. Tremendous attention has been focused on oil-water two-phase flow model based on the Perrine-Martin theory. However, the saturation gradient is not considered in the Perrine-Martin method, which may result ...

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DFIT—The Unconventional Well Test: An Introduction

Apr 19, 2017· DFIT—The Unconventional Well Test: An Introduction David P. Craig, PhD, PE ... matrix and natural fractures in a very large volume in excess of 1,000,000 cubic feet. ... Nitrogen Fracture‐Injection/Falloff Testing and Analysis in UnderpressuredReservoirs.

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UIC Pressure Falloff Requirements Condensed Version of the ...

Therefore, the injection period must reach radial flow prior to shut-in of the well in order for the falloff test to reach radial flow X Ideally to determine the optimal lengths of the injection and falloff periods, the test should be simulated using measured or estimated reservoir parameters.

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(PDF) Analysis of Pressure-Falloff Tests Following Cold ...

Analysis of Pressure-Falloff Tests Following Cold-Water Injection ... Injection/falloff testing when the injected fluid is either water or carbonated water is particularly important for offshore ...

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Injection and falloff test analysis to estimate properties ...

This method is based on graphical analysis of unsteady-state pressure-time data from an injection-falloff test sequence. Both gas and water injection testing are considered. Flow in a horizontal fracture of limited lateral extent, bounded above and below by an impermeable matrix, and intersected by a cylindrical borehole is described by two ...

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Transient Pressure Well Test Analysis of Fractured ...

at depth of 1183m to 1186m. An injection falloff test was carried out on this well on January 2010, the pressure response during fall off at depth of 1184m and pressure derivative on log-log plot of the test are shown in Figure 3 and Figure 4 respectively. There is no recorded pressure of injection period prior to fall-off during this test.

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Guidelines for Step Rate Testing - advntk.com

It can be run after a conventional falloff or a final falloff segment can be used in the test. Repeated falloff testing can also be used to assess if a reservoir has been altered by thermal changes in in-situ stresses or changes in kh associated with thermal effects. Injection is carried out at a number of rates below fracturing pressure.

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falloff test - Schlumberger Oilfield Glossary

The measurement and analysis of pressure data taken after an injection well is shut in. These data are often the easiest transient well-test data to obtain. Wellhead pressure rises during injection, and if the well remains full of liquid after shut-in of an injector, the pressure can be measured at the surface, and bottomhole pressures can be calculated by adding the pressure from the ...

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KDHE Geology and Well Technology Fall Seminar 2015

The formation pressure fall-off test will be conducted on the following described Class I injection well(s) and the results and interpretation submitted in accordance with the KDHE procedure document titled ³)RUPDWLRQ Pressure Fall-Off Test and Testing Plan Development Procedures ± Procedure #UICI- …

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Real-time evaluation of matrix acidizing treatments ...

Real-time evaluation of matrix acidizing treatments. J. Pet. Sci. Eng., 1: 145-154. As with any stimulation operation, it is important to evaluate the effectiveness of matrix stimulation treatments. This would allow intelligent decisions on the size and type of jobs and their comparison with expected benefits in increased production.

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Analysis of pressure falloff tests of non-Newtonian power ...

Analysis of pressure falloff tests of non-Newtonian power-law fluids in naturally-fractured bounded reservoirs Omotayo Omosebi a, *, Alpheus Igbokoyi b a The University of Oklahoma, USA b African ...

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Applications of real-time matrix-acidizing evaluation ...

An associated pretreatment injection/falloff test is presented as an essential element of that method. It involves injection of an inert fluid (water or reservoir oil) and analysis of the ensuing falloff for a period during which pumping has stopped just before acid enters the perforations. Injection resumes immediately thereafter.

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Drilling and testing geothermal wells - Home | ESMAP

DRILLING AND TESTING GEOTHERMAL WELLS A Presentatoni or Tf he World Bank ... Injection testing while Pressure/Temperature/Spinner logging Falloff or Buildup testing . FLOWING WELLS ARE MEASURED USING:

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Best practices for the determination of low-pressure ...

Nov 15, 2015· Injection falloff test (IFOT) technology has been employed for CBM reservoir tests in China since 1992, when the United Nations Development Programme (UNDP) sponsored the first training courses in China. IFOT is employed in open holes as soon as …

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AN INTRODUCTION TO PRESSURE TRANSIENT TESTING OF …

an introduction to pressure transient testing of injection wells and use for uic permit and landban petition compliance groundwater protection council annual underground injection control conference february 2017; austin, texas ken cooper lewis wandke & payne petrotek engineering corporation petrotek - 2017

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UIC Pressure Falloff Testing Guideline - Third Revision

UIC PRESSURE FALLOFF TESTING GUIDELINE Third Revision August 8, 2002 1.0 Background The Hazardous and Solid Waste Amendments of 1984 to the Resource Conservation and Recovery Act mandated prohibitions on the land disposal of hazardous waste. These prohibitions are known as the land disposal restrictions and EPA promulgated regulations to

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EPA Fall-Off Test

consisting of the fractures and matrix. b. The falloff analysis is complex. The characteristics of the semi-log derivative trough on the log-log plot indicate the level of communication between the fractures and the matrix rock. 3) Pressure differential in injection zone > 450 psi, which indicates the injection zone is …

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Injection Fall Off - Halliburton

As with a producing well, injection wells may also build "skin" over their operating life. This skin may result from the accumulation of foreign matter screened or filtered from the injected fluid. The magnitude of the skin and the permeability of the reservoir in the area around the wellbore is determined from the injection fall-off test.

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A New Refracture-Candidate Diagnostic Test Determines ...

extended pressure falloff period. Unlike the nitrogen injection/falloff test used by Hopkins et al.,9 a nitrogen slug test is analyzed using slug-test type curves and by history matching the injection and falloff pressure with a finite-difference simulator.8 Similarly, fracture-injection/falloff …

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Mini frac (DFIT)Analysis for Unconventional Reservoirs ...

• A mini‐frac test is an injection/falloff diagnostic test performed without proppant before a main fracture stimulation treatment • The intent is to break down the formation to create a short fracture during the injection period, and then to observe closure of the fracture system during the

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October 2018 Guidance for Pressure Fall-off Testing in ...

The minimum and most common means of testing to satisfy the regulatory requirements is the pressure fall-off test. A typical test consists of injection into a well at a constant rate for a period of time followed by shut-in of the well and monitoring of the pressure decline. At the director's discretion, additional testing may be required.

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injection well testing - Schlumberger Oilfield Glossary

The testing of wells in which fluid is being injected into the reservoir.The most common type of test is a falloff test, in which injection is halted and the pressure decline is measured as a function of time. The most common situation is a waterflood.In many reservoirs, the formation pressure is high enough to maintain a full column of fluid in the wellbore and the pressure can be monitored ...

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FORMATION PRESSURE FALL-OFF TEST AND TESTING …

FORMATION PRESSURE FALL-OFF TEST AND . TESTING PLAN DEVELOPMENT PROCEDURES . Procedure #: UICI-2 (4/11) SECTION I. PURPOSE. The purpose of this test is to identify injection interval or wellbore problems and injection interval characteristics. It is the responsibility of the permittee to develop a testing procedure which will generate

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Injection Fall-off Testing using the SPIDR® Gauge

Injection Fall-off Testing using the SPIDR® Gauge Testing wells from the surface has become increasingly accepted from operators both in conventional gas and gas condensate PTA applications but more recently in injection fall-off testing. Operators are demanding a higher quality pressure gauge, one that incorporates DUAL QUARTZ crystalline ...

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