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Search Petrowiki: The Single-Well Chemical Tracer Test - A Method For Measuring Reservoir Fluid Saturations In Situ
...Publication Information Petroleum Engineering Handbook Larry W. Lake, Editor-in-Chief Volume V – Reservoir Engineering and Petrophysics Edward D. Holstein, Editor Copyright 2007, Society of Petroleum Engi...neers Chapter 5 – The Single-Well Chemical Tracer Test-A ...Method For ...
The single-well chemical tracer (SWCT) test is an in-situ method for measuring fluid saturations in reservoirs. Most often, residual oil saturation (Sor) is measured; less frequently, connate water saturation (Swc) is the objective. Either saturation is measured where one phase effectively is stationary in the pore space (i.e., is at residual saturation) and the other phase can flow to the wellbore. Recently, the SWCT method has been extended to measure oil/water fractional flow at measured fluid saturations in situations in which both oil and water phases are mobile. The SWCT test is used primarily to quantify the target oil saturation before initiating improved oil recovery (IOR) operations, to measure the effectiveness of IOR agents in a single well pilot and to assess a field for bypassed oil targets. Secondarily, it is used to measure Swc accurately for better evaluation of original oil in place (OOIP). Fractional flow measurement provides realistic input for simulator models used to calculate expected waterflood performance. This chapter familiarizes the reader with the SWCT method, and offers guidelines for selecting suitable test wells and for planning and executing the field operations on the target well. Test interpretation is also discussed and illustrated with typical examples. The first SWCT test for Sor was run in the East Texas Field in 1968.[1] Patent rights were issued in 1971.[2] Since then, numerous oil companies have used the SWCT method.[3][4][5][6][7]
Petrowiki
chemical tracer, coefficient, concentration, equation, equilibrium distribution coefficient, ester, evaluation, field data, knowledge management, local equilibrium, material-balance tracer, measuring reservoir fluid saturation, molecule, pore space, reservoir, saturation, Simulation, SOR, SWCT method, SWCT test, test well, tracer, tracer test analysis, Upstream Oil & Gas
Country:
- North America > United States > Texas > Upshur County (0.24)
- North America > United States > Texas > Smith County (0.24)
- North America > United States > Texas > Rusk County (0.24)
- (2 more...)
Oilfield Places:
- North America > United States > Texas > East Texas Salt Basin > East Texas Field > Woodbine Formation (0.99)
- North America > United States > Alaska > North Slope Basin > Prudhoe Bay Field > Aurora Field (0.99)
SPE Disciplines:
Technology:
- Information Technology > Knowledge Management (0.40)
- Information Technology > Communications > Collaboration (0.40)
...PEH:The Single-Well Chemical Tracer Test - A ...Method For ...Measuring Reservoir Fluid Saturations In ...
The first SWCT test for Sor was run in the East Texas Field in 1968.[1] Patent rights were issued in 1971.[2] Since then, numerous oil companies have used the SWCT method.[3][4][5][6][7] More than 400 SWCT tests have been carried out, mainly to measureSor after waterflooding. The SWCT method has gained considerable recognition over the past few years because of increasing interest in the quantitative measurement ofSor. Some experts[8][9] consider the SWCT test to be the method of choice because of its demonstrated accuracy and reasonable cost.
Petrowiki
alcohol, chemical tracer, coefficient, concentration, equilibrium, ester, fraction, injection, knowledge management, material-balance tracer, method, molecule, partition coefficient, reservoir, saturation, Simulation, SOR, SWCT test, tracer, tracer test analysis, united states government, Upstream Oil & Gas
Country:
- North America > United States > Texas (1.00)
- North America > United States > Alaska > North Slope Borough > Prudhoe Bay (0.28)
Oilfield Places:
- North America > United States > Texas > East Texas Salt Basin > East Texas Field > Woodbine Formation (0.99)
- North America > United States > Gulf of Mexico > Central GOM > East Gulf Coast Tertiary Basin > Eugene Island > Block 193 > Bay St. Elaine Field (0.99)
- North America > United States > California > West Coyote Field (0.99)
- (2 more...)
SPE Disciplines: Reservoir Description and Dynamics > Formation Evaluation & Management > Tracer test analysis (1.00)
Technology:
- Information Technology > Knowledge Management (0.40)
- Information Technology > Communications > Collaboration (0.40)
...Single well chemical tracer test PetroWiki The ...single-well chemical tracer (SWCT) ...test is an in-...
The single-well chemical tracer (SWCT) test is an in-situ method for measuring fluid saturations in reservoirs. Most often,residual oil saturation is measured; less frequently,connate water saturation (Swc) is the objective. Either saturation is measured where one phase effectively is stationary in the pore space (i.e., is at residual saturation) and the other phase can flow to the wellbore. Recently, the SWCT method has been extended to measure oil/water fractional flow at measured fluid saturations in situations in which both oil and water phases are mobile. The SWCT test is used primarily to quantify the target oil saturation before initiating improved oil recovery (IOR) operations, to measure the effectiveness of IOR agents in a single well pilot and to assess a field for bypassed oil targets.
Petrowiki
calibration, chemical tracer, Dean, enhanced recovery, evaluation, fraction, infill drilling, knowledge management, method, presented, reservoir, Reservoir Evaluation, residual oil saturation, saturation, single-well chemical tracer method, single-well tracer method, SOR, technical conference, Tracer Method, tracer test analysis, united states government, Upstream Oil & Gas
Oilfield Places:
- North America > United States > Texas > East Texas Salt Basin > East Texas Field > Woodbine Formation (0.99)
- North America > United States > Gulf of Mexico > Central GOM > East Gulf Coast Tertiary Basin > Eugene Island > Block 193 > Bay St. Elaine Field (0.99)
- North America > United States > Texas > Fort Worth Basin > Voss Field > Tannehill Formation (0.98)
SPE Disciplines:
Technology:
- Information Technology > Knowledge Management (0.41)
- Information Technology > Communications > Collaboration (0.41)
...Interpreting data collected during a single well chemical tracer test PetroWiki Even with a properly designed ...single well chemical tracer (SWCT) ...test, interpreting the data requires judgment calls, and typically,simulation, to arrive at a final esti...
Even with a properly designed single well chemical tracer (SWCT) test, interpreting the data requires judgment calls, and typically,simulation, to arrive at a final estimation of residual oil. Tomich et al.[1] report one of the earliest SWCT tests, which was performed on a Frio Sandstone reservoir on the Texas Gulf Coast. The results of this test are used here to demonstrate the details of SWCT test interpretation for an ideal situation. The test well in the Tomich et al.[1] report was in a fault block that had been depleted for several years. Because of the natural water drive and high permeability of the sand, the formation was believed to be near trueSor.
Petrowiki
SPE Disciplines: Reservoir Description and Dynamics > Formation Evaluation & Management > Tracer test analysis (1.00)
Technology:
- Information Technology > Knowledge Management (0.42)
- Information Technology > Communications > Collaboration (0.42)
...Residual oil evaluation using single well chemical tracer test PetroWiki The ...single-well chemical tracer (SWCT) ...test is an in-...
The SWCT test for Sor uses only one well and involves the injection and back production of water carrying chemical tracers. A typical target interval for SWCT testing is shown inFigure 1. The candidate well should be completed only to the watered-out zone of interest (zone atSor). The water used normally is from the formation to be tested, and often is collected during the initial setup for the test.
Petrowiki
alcohol, alkyl ester, chemical tracer, coefficient, concentration, equilibrium, ester, ester molecule, ester tracer, evaluation, fraction, knowledge management, laboratory, material-balance tracer, molecule, partition coefficient, reaction, reservoir, saturation, SOR, tracer, tracer molecule, tracer test analysis, Upstream Oil & Gas
SPE Disciplines: Reservoir Description and Dynamics > Formation Evaluation & Management > Tracer test analysis (1.00)
Technology:
- Information Technology > Knowledge Management (0.41)
- Information Technology > Communications > Collaboration (0.41)
...Designing single well chemical tracer test for residual oil PetroWiki Using the ...single well chemical tracer (SWCT) ...test avoids the problems of too-wide well spacing and excessive ...
Using the single well chemical tracer (SWCT) test avoids the problems of too-wide well spacing and excessive tracer dispersion caused by layering that can occur withwell to well tests. In the SWCT test, the tracer-bearing fluid is injected into the formation through the test well and then produced back to the surface through the same well. The time required to produce the tracers back can be controlled by controlling the injected volume on the basis of available production flow rate from the test well. In a single-well test, tracers injected into a higher-permeability layer will be pushed farther away from the well than those in a lower-permeability layer, as indicated inFigure 1a; however, the tracers in the higher-permeability layer will have a longer distance to travel when flow is reversed. As the tracer profiles inFigure 1b show, the tracers from different layers will return to the test well at the same time, assuming that the flow is reversible in the various layers.
Petrowiki
chemical tracer, coefficient, concentration, dispersion, Drillstem Testing, drillstem/well testing, ester, information, injection, investigation, knowledge management, laboratory, method, permeability, reservoir, saturation, schematic, separator, setup, single-well tracer test, SOR, tracer, tracer concentration, tracer test analysis, Upstream Oil & Gas
SPE Disciplines:
Technology:
- Information Technology > Knowledge Management (0.41)
- Information Technology > Communications > Collaboration (0.41)
...Evaluating IOR potential with single well chemical tracer test PetroWiki The ...single well chemical tracer (SWCT) ...test can be used to evaluate an Improved oil recovery (IOR) process quickly and inexpensively. The one-s...
The single well chemical tracer (SWCT) test can be used to evaluate an Improved oil recovery (IOR) process quickly and inexpensively. The one-spot procedure takes advantage of the nondestructive nature of the SWCT method. The single-well (one-spot) pilot is carried out in three steps. First, Sor for the target interval is measured (seeResidual oil evaluation using single well chemical tracer test. Then an appropriate volume of the IOR fluid is injected into the test interval and pushed away from the well with water.
Petrowiki
ansor, California, chemical tracer, enhanced recovery, evaluation, Exhibition, field, hydrocarbon-miscible ior, in-situ evaluation, knowledge management, presented, reduction, saturation, sequence, spe annual technical conference, testing reduction, tracer test analysis, united states government, Upstream Oil & Gas, waterflood
Country:
- North America > United States > California > San Francisco County > San Francisco (0.15)
- North America > United States > Alaska > North Slope Borough > Prudhoe Bay (0.15)
Oilfield Places:
- North America > United States > California > West Coyote Field (0.99)
- North America > United States > Alaska > North Slope Basin > Prudhoe Bay Field > Aurora Field (0.99)
SPE Disciplines:
Technology:
- Information Technology > Knowledge Management (0.42)
- Information Technology > Communications > Collaboration (0.42)
...Simulation of single well chemical tracer tests PetroWiki Simple analytical interpretation of ...single well chemical tracer (SWCT) is possible if one assumes uniform oil saturation, negligible hydrolysis during injection an...d production and assuming similar dispersion for all reservoir layers. In complex ...
Simple analytical interpretation of single well chemical tracer (SWCT) is possible if one assumes uniform oil saturation, negligible hydrolysis during injection and production and assuming similar dispersion for all reservoir layers. In complex reservoir settings, including multilayer test zones, drift, cross-flow etc., reservoir simulation tools, capable of handling the hydrolysis reaction are commonly applied (Jerauld et al., 2010; Skrettingland et al., 2011). In practice, coupled flow and chemical reaction simulators (see e.g. CMG, 2010; and UTCHEM, 2000) are used. Such coupled simulations are CPU-demanding enough that execution time may be an issue, especially when small grid-size are applied to avoid numerical smearing. A significantly simpler and faster approach is possible by exploiting the fact that tracers do not influence on the fluid flow in the reservoir.
Petrowiki
alcohol, case 3, chemical tracer, concentration, dead-end pore, equation, equilibrium, ethyl formate, fraction, hydrolysis, injection, knowledge management, material-balance tracer, Modeling & Simulation, saturation, simulator, SOR, tracer, tracer test analysis, united states government, Upstream Oil & Gas
SPE Disciplines: Reservoir Description and Dynamics > Formation Evaluation & Management > Tracer test analysis (1.00)
Technology:
...Help Category:5.6.5 Tracer test analysis PetroWiki . Pages in category "5.6.5 ...Tracer test analysis" The following 19 pages are in this category, out of 19 total. C * ...Chemical gas tracers * ...
The following 19 pages are in this category, out of 19 total.
Petrowiki
SPE Disciplines: Reservoir Description and Dynamics > Formation Evaluation & Management > Tracer test analysis (1.00)
Technology:
- Information Technology > Knowledge Management (0.46)
- Information Technology > Communications > Collaboration (0.46)
...Help Category:Volume V – Reservoir Engineering and Petrophysics PetroWiki . Pages in category "Volume V – ...Reservoir Engineering and Petrophysics" The following 27 pages are in this category, out of 27 total. A ...ging E * PEH:Estimation of Primary Reserves of Crude Oil, Natural Gas, and Condensate F * PEH:Fluid Flow Through Permeable Media * PEH:Fundamentals of Geophysics G * PEH:Gas Reservoirs I * PEH...
The following 27 pages are in this category, out of 27 total.
Petrowiki
SPE Disciplines:
- Reservoir Description and Dynamics > Reservoir Characterization (1.00)
- Reservoir Description and Dynamics > Improved and Enhanced Recovery (1.00)
- Reservoir Description and Dynamics > Formation Evaluation & Management > Tracer test analysis (0.94)
- Reservoir Description and Dynamics > Formation Evaluation & Management > Open hole/cased hole log analysis (0.67)
Technology:
- Information Technology > Knowledge Management (0.45)
- Information Technology > Communications > Collaboration (0.45)
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