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Change of reservoir properties as a result of acid treatment
Petroleum geology, geophysics

Authors: Alexander V. POSTNIKOV (b. 1948). Education - Gubkin Russian State University of Oil and Gas. The doctor of geology-mineralogical sciences, the professor, the head of the lithology department. The author of more than 100 published works, including 4 monographies, on various problems of geology.
Vladislav A. KOSMYNIN (b. 1984) education - Gubkin Russian State University of Oil and Gas. The post-graduate student of the lithology department, younger scientific employee. The author of 4 theses of reports of a student’s scientific organization (the laureate of conference). E-mail: biblioteka@nedrainform.ru

Abstract: The influence of acid treatment on carbonate reservoirs is analyzed on samples of core. Several genetic types of upper Devonian limestones and dolomites of the Timano-Pechora Province are studied. The investigated acidized samples were saturated colored pitch. The structure of pore space was analyzed in transparent sections. Depending on the rock composition and structure both improved reservoir properties of rocks, and their deterioration was established. It is shown that acid treatment in good re- servoirs can be not effective or have negative consequences, while inferior reservoirs can show improved permeability.

Index UDK: 552.08:522.54:551.734(470.13)

Keywords: collector, porosity, permeability, acid treatment, Timano-Pechora