Radiotracer applications in reservoir evaluation

J. Moghadasi, V. Dehdari, A. O. Sharif

Research output: Contribution to conferencePaper

Abstract

When primary oil production decreases in a field because of reduction in original pressure, water is usually injected to increase oil production. Injected water in special wells (injection wells) forces the oil remaining in certain layers to emerge from other wells (production wells) surrounding the injector. This technique, commonly called secondary recovery, contributes in extracting up to 50% of the original oil in place. Although this technique was first used in old reservoirs where oil production had decreased, it is today a common practice to begin the exploitation of new wells with fluid injection as a way to optimize oil recovery. For this reason, the name secondary recovery is being replaced by the more general term water flooding. Efficiency of the water flooding process is highly dependent on the rock and fluid characteristics. In general, it will be less efficient if heterogeneity is present in the reservoir, such as permeability barriers or high permeability channels that impede a good oil displacement by the injected water [1]. On the other hand Most of the scales found in oil fields forms either by direct precipitation from the water that occurs naturally in reservoir rocks, or as a result of produced water becoming oversaturated with scale components when two incompatible waters meet downhole. The present study attempts to establish the tracer technology as a reliable source of information in scaling experiments and reservoir evaluation such as reservoir heterogeneity. In a series of calcite scaling experiments in sand, Ca2+ was used as a tracer to monitor the CaCO3 precipitation. The results show that the introduction of tracer technology, for the first time in scaling experiments in porous media, has been successful [3].

Original languageEnglish
Pages379-386
Number of pages8
Publication statusPublished - 22 May 2006
Event2006 SPE International Symposium and Exhibitionon Formation Damage Control - Lafayette, LA, United States
Duration: 15 Feb 200617 Feb 2006

Other

Other2006 SPE International Symposium and Exhibitionon Formation Damage Control
CountryUnited States
CityLafayette, LA
Period15/2/0617/2/06

    Fingerprint

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Geotechnical Engineering and Engineering Geology

Cite this

Moghadasi, J., Dehdari, V., & Sharif, A. O. (2006). Radiotracer applications in reservoir evaluation. 379-386. Paper presented at 2006 SPE International Symposium and Exhibitionon Formation Damage Control, Lafayette, LA, United States.