A 1D Analytical Solution to Determine Residual Oil Saturations from Single-well Chemical Tracer Test

2020 ◽  
Author(s):  
Shashvat Doorwar ◽  
Mohsen Tagavifar ◽  
Varadarajan Dwarakanath
Keyword(s):  
Analytical Solution ◽  
Tracer Test ◽  
Residual Oil ◽  
Chemical Tracer ◽  
Single Well

Evaluation of Residual Oil Saturation With Use of Single Well Chemical Tracer Test Swctt For Estimation of Eor Efficiency. From Theory to Experiment

2021 ◽  
Author(s):  
Fedor Andreevich Koryakin ◽  
Nikolay Yuryevich Tretyakov ◽  
Vladimir Evgenyevich Vershinin ◽  
Roman Yuryevich Ponomarev
Keyword(s):  
Analytical Methods ◽  
Tracer Test ◽  
Hydrodynamic Modeling ◽  
Residual Oil ◽  
Tracer Studies ◽  
Oil Saturation ◽  
Residual Oil Saturation ◽  
Chemical Tracer ◽  
Single Well

Abstract This article provides a brief overview of the theory of tracer studies, describes approaches to the interpretation of tracer studies using both analytical methods and hydrodynamic modeling, compares the results of analytical and numerical interpretation. The article also describes the problems that arise during the interpretation of real case study.

scholarly journals MUSCL scheme for Single Well Chemical Tracer Test simulation, design and interpretation

2019 ◽  
Vol 74 ◽  
pp. 10 ◽  
Author(s):  
Benjamin Braconnier ◽  
Christophe Preux ◽  
Frédéric Douarche ◽  
Bernard Bourbiaux
Keyword(s):  
Numerical Scheme ◽  
Tracer Test ◽  
Time Shift ◽  
Residual Oil ◽  
Oil Saturation ◽  
Residual Oil Saturation ◽  
Chemical Tracers ◽  
Chemical Tracer ◽  
Single Well ◽  
Order Scheme

Our paper presents an improved numerical scheme to simulate Single Well Chemical Tracer Test (SWCTT) method. SWCTT is mainly applied to determine the residual oil saturation of reservoirs. It consists in injecting an aqueous slug of a primary tracer into the reservoir formation and displacing it at a certain distance from the well. This tracer is partly miscible with oil on the one hand, and generates in situ a secondary tracer on the other hand. As a consequence, a shift is observed between the primary and the secondary tracers arrival times when production is resumed. This time shift is used to evaluate the residual oil saturation. In our paper, we propose a numerical scheme based on a fractional time stepping technique to decouple the resolution of the phases mass conservation equations and the chemical tracers mole conservation equations. For the phases resolution, we use an implicit scheme to ensure stability and robustness. For the chemical tracers, we propose an explicit second-order scheme in time and in space via MUSCL technique to improve the tracers time-shift calculation. The proposed numerical method is implemented on a realistic simulation model consisting of a vertical well crossing a reservoir consisting of a stack of homogeneous layers. By reducing the numerical dispersion, the proposed scheme improves the accuracy of predicted concentration profiles, without significantly increasing the computation time. Finally, the advantages of using a second-order scheme for residual oil saturation assessment are discussed on the basis of a radial 1D mesh convergence study.

Single-Well Chemical Tracer Test for Residual Oil Measurement: Field Trial and Case Study

2016 ◽  
Author(s):  
Mohammed AlAbbad ◽  
Senthilmurugan Balasubramanian ◽  
Modiu Sanni ◽  
Sunil Kokal ◽  
Ibrahim Zefzafy ◽  
...  
Keyword(s):  
Field Trial ◽  
Tracer Test ◽  
Residual Oil ◽  
Chemical Tracer ◽  
Single Well

Hydrocarbon saturation determination with the single-well-chemical-tracer-test under laboratory conditions

2021 ◽  
pp. 131-143
Author(s):  
F. A. Koryakin ◽  
N. Yu. Tretyakov ◽  
O. B. Abdulla ◽  
V. G. Filippov
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Production Efficiency ◽  
Oil Production ◽  
Tracer Test ◽  
Core Sample ◽  
Oil Saturation ◽  
Chemical Tracer ◽  
Single Well ◽  
Efficiency Estimation

Nowadays the share of hard-to-recover reserves is growing, and to maintain oil production on necessarily level, we need to involve hard-to-recover reserves or to increase oil production efficiency on a brownfields due to enhanced oil recovery. The efficiency of enhanced oil recovery can be estimated by oil saturation reduction. Single-well-chemical-tracer-test (SWCTT) is increasingly used to estimate oil saturation before and after enhanced oil recovery application. To interpret results of SWCTT, reservoir simulation is recommended. Oil saturation has been calculated by SWCTT interpretation with use of reservoir simulator (CMG STARS). Distribution constants has been corrected due to results of real core sample model, and core tests has been successfully simulated. Obtained values of oil saturation corresponds with real oil saturation of samples. Thus, SWCTT as a method of oil saturation estimation shows good results. This method is promising for enhanced oil recovery efficiency estimation.

A Design for the Evaluation of a Waterflood EOR Technique by Single-Well Chemical Tracer Test in an Offshore Environment

2016 ◽  
Author(s):  
Kevin Webb ◽  
Maynard Marrion ◽  
Jon Stapley ◽  
Martin McCormack ◽  
Dale Williams ◽  
...  
Keyword(s):  
Tracer Test ◽  
Chemical Tracer ◽  
Single Well

Low Salinity Waterflooding: From Single Well Chemical Tracer Test Interpretation to Sector Model Forecast Scenarios

2016 ◽  
Author(s):  
Marco Spagnuolo ◽  
Chiara Callegaro ◽  
Franco Masserano ◽  
Marianna Nobili ◽  
Riccardo Sabatino ◽  
...  
Keyword(s):  
Tracer Test ◽  
Test Interpretation ◽  
Model Forecast ◽  
Sector Model ◽  
Low Salinity ◽  
Chemical Tracer ◽  
Low Salinity Waterflooding ◽  
Single Well

The Design and Execution of an Alkaline/Surfactant/Polymer Pilot Test

2013 ◽  
Vol 16 (04) ◽  
pp. 423-431 ◽  
Author(s):  
A.. Sharma ◽  
A.. Azizi-Yarand ◽  
B.. Clayton ◽  
G.. Baker ◽  
P.. McKinney ◽  
...  
Keyword(s):  
Tracer Tests ◽  
Tracer Test ◽  
Lessons Learned ◽  
Chemical Tracer ◽  
The Us ◽  
Single Well ◽  
Initial Discovery ◽  
Sandstone Formation ◽  
Field Perspective ◽  
Alkaline Surfactant Polymer

Summary A tertiary alkaline/surfactant/polymer (ASP) pilot flood was implemented during 2010 in the Illinois basin of the US, and is continuing currently. With initial discovery of the Bridgeport sandstone formation in the early 1900s and more than 60 years of waterflooding, the pilot was designed to demonstrate that ASP flooding could produce sufficient quantities of incremental oil to sanction a commercial project. Laboratory experiments, including corefloods, were performed to determine the optimal chemical formulation for the pilot and to provide essential parameters for a numerical-simulation model. Polymer-injectivity tests, single well chemical tracer tests (SWCTTs), and an interwell-tracer-test (IWTT) program were all performed to prepare for and support a full interpretation of the pilot results. A field laboratory was run through the duration of the pilot to monitor the quality of the injection and production fluids, which turned out to be critical to the success of the pilot. We present the results and interpretation of the ASP pilot to date, the challenges faced during the project, and the lessons learned from the field perspective.

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