Қазақстанның мұнай-газ саласының хабаршысыҚазақстанның мұнай-газ саласының хабаршысы2707-42262957-806XKMG Engineering10862710.54859/kjogi108627Research ArticleThe methods for evaluating the efficiency of EOR by SWCTT & PITT tracer testsKellerYuriy A.<p>Cand. Sc. (Physics and Mathematics)</p>ykeller@integra.ruUskovAlexander A.auskov@integra.ruEngineering Center, Siam Master LLC130420235147562311202213032023Copyright © 2023, Keller Y.A., Uskov A.A.2023<p><strong>Background:</strong> In Russia, as well as in the whole world, the number of oil fields that at the last stage of development and characterized by a high water cut of the production is growing. In order to extend the period of their cost-effective operation, a transition from classical waterflooding to the use of chemical methods to enhanced oil recovery (hereinafter - EOR) is required, which implies a preliminary assessment of their potential effectiveness.</p> <p><strong>Aim:</strong> To select and evaluate chemical compositions, test on core materials with subsequent recommendation of effective compositions.</p> <p><strong>Materials and methods:</strong> This paper reviews a description of the SWCTT and PITT and evaluation is made of the place of these technologies in the chain of implementation of EOR from laboratory experiments to commercial implementation. The SWCTT method was developed in the 1970s to measure residual oil saturation in the near-wellbore zone after the application of oil enhancement methods. This method is based on the use of partitioning oil-soluble tracer, which forms a secondary non-separable water-soluble traces in the near-wellbore zone due to the hydrolysis process. Evaluation of residual oil saturation is carried out by the time delay in the arrival of the oil and water partitioning tracers.</p> <p><strong>Results:</strong> As a result of the pilot project, experience was gained in implementing SWCTT technology to evaluate the effectiveness of surfactant flooding at a producing oil well in one of the fields of the Khanty-Mansiysk Autonomous Region.</p> <p><strong>Conclusion:</strong> The evaluation and effectiveness of the technology with the selected formulations using simulation and the use of alternative SWCTT/PITT tracer methods has been proven by field tests.</p>polymer floodingchemical methods of enhanced oil recoveryevaluation of EOR efficiencySWCTTPITTполимерлі суландырумұнай беруді арттырудың химиялық әдістеріМБАӘ тиімділігін бағалауSWCTТPITTполимерное заводнениехимические методы увеличения нефтеотдачиоценка эффективности МУНSWCTTPITT1.Carlisle C, Al-Maraghi E, Al-Saad B, et al. One-Spot Pilot Results in the Sabriyah-Mauddud Carbonate Formation in Kuwait Using a Novel Surfactant Formulation. SPE Improved Oil Recovery Symposium; 2014 Apr 12; Tulsa, USA. Paper Number: SPE-169153-MS.2.Deans HA. Method of determining fluid saturations in reservoir. United States patent US 3623842. 1971.3.Al-Abbad MA, Sanni ML, Kokal S, et al. A Step-Chance for Single Well Chemical Tracer Tests SWCTT: Field Pilot Testing of New Sets of Novel Tracers. SPE Annual Technical Conference and Exhibition; 2016 Sept 16; Dubai, UAE. Paper Number: SPE-181408-MS.4.Al-Mutairi F, Tiwari S, Baroon B, et al. Simulation of Single Well Chemical Tracer Tests Conducted in Carbonate Reservoir. SPE Kuwait Oil & Gas Show and Conference; 2015 Oct 11; Mishref, Kuwait. Paper Number: SPE-175282-MS.5.Deans HA, Carlisle C. Single-Well Chemical Tracer Test Handbook. 2nd ed. Laramie, Wyoming: Chemical Tracers, Inc.6.Jerauld GR, Mohammadi H, Webb KJ. Interpreting Single Well Chemical Tracer Tests. SPE Improved Oil Recovery Symposium; 2010 Apr; Tulsa, USA. Paper Number: SPE-129724-MS.