Study of physicochemical properties and development of formulations of acid compositions for intensifying the influx of oil from Domanic deposits

UDK: 622.276.63
DOI: 10.24887/0028-2448-2019-11-120-123
Key words: Domanic deposits, acid compositions, manometric installation, kinetics of gas development, acid factor, filtration studies
Authors: I.S. Zakirov (Almetyevsk State Oil Institute, RF, Almetyevsk), E.F. Zakharova (Almetyevsk State Oil Institute, RF, Almetyevsk), A.A. Lutfullin (Tatneft PJSC, RF, Almetyevsk), E.M. Abusalimov (Tatneft PJSC, RF, Almetyevsk), A.G. Telin (Ufa SciTechCenter LLC, RF, Ufa), A.A. Mamykin (Ufa SciTechCenter LLC, RF, Ufa), N.A. Sergeeva (Ufa SciTechCenter LLC, RF, Ufa), S.L. Volfovich (Ufa SciTechCenter LLC, RF, Ufa)

The conditions for the development of unconventional reserves stipulate the use of improved approaches in studying the characteristics of Domanic wells stimulation. An important aspect of the use of acidic compounds is obtaining a significant increase in the well flow index based on a detailed study of the possibility of the effects produced by various compounds on core samples in laboratory conditions. Conducting filtration studies on reservoir models reduces the risks of using new acid formulations in real unconventional reserves field conditions during pilot trials.

The article presents the results of optimizing acid compositions for Domanic deposits. The acid composition was optimized by physicochemical studies at a manometric installation using core, oil and water samples from the Bavlinskoye field. The results of the selection of corrosion inhibitors and tests to assess the stability of the acid composition and stabilization of iron (III) ions, which prevent the formation of stable emulsions and sediment, are presented.

The paper also includes the experimental data of filtration studies to determine the optimal volume of the acid composition at various rates of its injection into the pore matrix of the reservoir.

Under Agreement 14.607.21.0195 and as part of the Federal Target Program “Research and Development in Priority Directions for the Development of the Russian Science and Technology Complex in 2014–2020”, Almetyevsk State Oil Institute carries out work on the theme “Development of Scientific and Technological Solutions for the Development of Unconventional Reservoirs (Domanic deposits) and Hard-to-Recover Oil (Bituminous Oil) Based on Experimental Studies”, which is focused on improving the process of production intensification with application of acid compositions in wells drilled in Domanic deposits.


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