An improved technology of a complex influence on productive layers of oil and gas wells
DOI:
https://doi.org/10.15587/1729-4061.2014.29316Keywords:
oil well, hydrogen, activation, permeability, collector, anomalous properties, bottom-hole zoneAbstract
The research focuses on an advanced technology of improving the collector properties of the bottom-hole zone in the productive horizons of oil and gas wells. The technology is based on a complex hydrogenic and thermal gas-chemical treatment of the wells.
The bottom-hole zone of the wells is directly exposed to a multi-step thermal gas and chemical process that releases gas, including hydrogen, and hot acids such as nitric and hydrochloric (in some cases it is hydrofluoric).
Hydrogen, discharged at the initial stage of the thermal chemical process, improves the permeability of the reservoir and facilitates filtering chemically active components into the layer. In order to specify and improve these processes, the study suggests a mathematic modeling of how a mixture of gases (Н2, CO2, NO, and NO2) influences gas permeability in the carbonate core.
The suggested computer model facilitates precise calculation of thermal gas dynamic as well as heat and mass exchange characteristics of the process in the layer bottom-hole zone at all the stages of its treatment. The model makes it possible to choose the most effective modes of processing and reduce the consumption of expensive reagents.
This technology was applied in the treatment of wells in which hydrocarbon reserves would usually be referred to the category of “problematic extraction” for a number of reasons—water cutting of the layer, high content of asphalt, resin and paraffin deposits, or low permeability, etc. The research findings have confirmed a high productivity of the devised technological approach.
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Copyright (c) 2014 Олег Викторович Кравченко, Дмитрий Александрович Велигодский, Андрей Николаевич Авраменко, Руслан Асгатович Хабибуллин
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