Do not apply pressure to eye during test (risk of eye tissue extrusion) VIII. References. Cain (1981) Arch Ophthalmol 99:2013 [PubMed] Images: Related links to external sites (from Bing) …
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injection pressure as the injection rate is reduced will be a function of the near-wellbore pressure drop.
A short injection / fall-off test is therefore often conducted to evaluate well injectivity performance prior to oil production. Following that, permanent downhole gauges are set to monitor full field development scale. Pressure transient data …
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Semantic Scholar extracted view of "Pressure Falloff Tests of New Coal Wells" by J. Seidle et al.
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Fall off water injection tests, prior to the initiation of the test into coal, were carried out 'gently' at slightly higher pressures than pore pressure to avoid dilating and thus changing …
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In order to increase the oil recovery, polymer injection is planning in the pilot. The fall-off test, one approach to analyse the polymer properties in reservoirs directly, is also …
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Similarly, injection volumes that are too small may reduce the quality of test results and may not shorten the required fall-off time. Rates of 1.0 to 1.5 m3/min for 5 to 10 minutes are usually …
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In recent history, due to interest in enhanced recovery (ECBM) and CO 2 sequestration in coal, several more core-based studies have been published, such as …
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sufficient to conduct a valid observation of the pressure fall-off curve…". This guidance outlines procedures which will aid in performance of a valid pressure fall-off test. The purpose of the …
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The measurement and analysis of pressure data taken after an injection well is shut in.
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permeabi lity of the Jam alganj coa l derived from t he in-sit u Inject ion Fall off Test (IFT), which is a n im portant re servoir parameter a nd on e of th e ke y fac tors in CBM exp loratio n an d
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Injection fall-off (IFO) testing typically refers to testing done in either Water disposal wells or injector wells for pressure maintenance or secondary/tertiary recovery methods. They are most …
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During a pressure fall-off test, the well is closed off from production or injection, and the pressure within the wellbore and surrounding reservoir is measured at regular intervals. …
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Erich Seidel (1882-1948) was a German ophthalmologist who first described the Seidel test in 1921. Definition. The Seidel test is used to identify full-thickness defects in the cornea or sclera by revealing leakage of aqueous humor. …
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Χ Injection rate(s) vs time: test well and offset wells (not a circular or strip chart) 22. A copy of the latest radioactive tracer run and a brief discussion of the results. 5.0 Planning …
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an Update and Implications for CO2 Injection By Ian Palmer (Higgs Technologies LLC) Abstract: A simple analytic model, based on rock mechanics, has been published previously for how …
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2.3 Model Test Set-Up The injection/fall-off test is conducted with a single injection rate at the mass flow rate for 24 hours and the fall-off period lasting for 96 hours. To obtain accurate and …
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a minimum, shut down of the well for a time sufficient to conduct a valid observation of the pressure fall-off. This test is known as the formation pressure fall-off test. SECTION III. …
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30+ years of industry experience primarily in unconventional reservoirs Reservoir engineering and economic studies for coalbed methane, shales, and tight oil
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John P Seidle; William B Hanson; Cite. Request full-text. ... Water injection/fall-off pressure transient tests are recommended to best determine permeability in coalbed reservoirs, 15 as …
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Injection/Fall-Off Test (IFOT) A pressure transient can be created by injecting fluid into a well. When the well is shut-in after injection, the reservoir pressure falls off. ... John A D. …
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Injection/fall-off test is a viable alternative to the conventional production/build-up sequence since it eliminates surface emissions. However, the well test interpretation is …
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Numerical well testing is used mostly in oil/gas, geothermal, and coalbed methane injection/falloff well-testing interpretations while few published studies have been presented on how to adjust ...
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Fall-off Test Fundamentals Final injection pressure Final shut-in pressure Injection period Shut-in period Initial pressure. Fall-off Test Fundamentals PFOT analysis process is combined with the …
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According to John Seidle [3], the Palmer-Mansoori porosity relation [25] can be written as ... Numerical-Well-Testing Interpretation of Injection/Falloff Testing for Coalbed …
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Injection-falloff test (IFT; Seidle et al., 1991, Zuber et al., 1990) is used to estimate in-situ reservoir permeability for object coal seams. This test is processed by firstly injecting a …
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pressure fall-off test can be used to determine the initial condition before injection (Harpole et al., 1994; Kuehne et al., 1990). propagation will then be inferred from a series of
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An important application of pressure transient test is fall-off testing. In studying water injection wells, besides the estimation of reservoir pressure around a given injector, ... Noak and Lester …
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A number of injection/fall tests using the Nolte G-function and after closure analyses (ACA) were performed on horizontal Marcellus Shale completions to determine the …
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John P. Seidle's 16 research works with 302 citations and 622 reads, including: Production Data Analysis of CBM Wells
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