Single-Well Chemical Tracer Test Experience in the Gulf of Guinea to Determine Remaining Oil Saturation

2011 ◽  
Author(s):  
Carolina Romero ◽  
Nicolas Agenet ◽  
Alexandre Lesage ◽  
Gilles Cassou
Keyword(s):  
Tracer Test ◽  
Gulf Of Guinea ◽  
Oil Saturation ◽  
Chemical Tracer ◽  
Remaining Oil ◽  
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.

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.

Snorre Low-Salinity-Water Injection—Coreflooding Experiments and Single-Well Field Pilot

2011 ◽  
Vol 14 (02) ◽  
pp. 182-192 ◽  
Author(s):  
K.. Skrettingland ◽  
T.. Holt ◽  
M.T.. T. Tweheyo ◽  
I.. Skjevrak
Keyword(s):  
Oil Recovery ◽  
Water Injection ◽  
Low Pressure ◽  
Tracer Test ◽  
Core Material ◽  
Improved Oil Recovery ◽  
Oil Saturation ◽  
Low Salinity ◽  
Remaining Oil ◽  
Single Well

Summary Low-salinity (lowsal) waterflooding has been evaluated for increased oil recovery (IOR) at the Snorre field. Coreflooding experiments and a single-well chemical tracer-test (SWCTT) field pilot have been performed to measure the remaining oil saturation after seawaterflooding and after lowsal flooding. The laboratory coreflooding experiments conducted at reservoir and low-pressure conditions involved core material from the Upper and Lower Statfjord and Lunde formations. The core material from the Statfjord formations gave incremental recovery in the order of 2% of original oil in place (OOIP) by injection of diluted seawater. Similar amounts were produced during following NaCl-based lowsal injections. The same trend was observed in the high- and low-pressure experiments. No significant response to lowsal flooding was observed for Lunde cores. No response was normally observed during alkaline injection. The SWCTT field pilot was carried out in the Upper Statfjord formation. The average oil saturations after seawater injection, after lowsal seawater injection, and after a new seawater injection were determined; no significant change in the remaining oil saturation was shown. The measured in-situ value of remaining oil saturation after seawaterflooding was in agreement with previous special core analysis (SCAL) experiments. The measured effect of tertiary lowsal flooding from core experiments was in agreement with the SWCTT. Both measurements indicated only low or no effect from lowsal injection. It has been suggested that lowsal flooding has a potential for improved oil recovery in all clayey sandstone formations containing crude oil. The results from this work indicate that the initial wetting condition is a crucial property for the effect of lowsal injection.

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.

Application of Single Well Chemical Tracer Tests to Determine Remaining Oil Saturation in Deepwater Turbidite Reservoirs

2011 ◽  
Author(s):  
Edward Dezabala ◽  
Bimal Parekh ◽  
Hector Arturo Solis ◽  
Manoj Kumar Choudhary ◽  
Leslie Jane Armentrout ◽  
...  
Keyword(s):  
Tracer Tests ◽  
Oil Saturation ◽  
Chemical Tracer ◽  
Remaining Oil ◽  
Single Well

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
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