INFLUENCE OF GEOLOGICAL STRUCTURE FEATURES OF GAS CONDENSATE DEPOSITS MATVIIVSKE ON THE CONDITIONS OF THEIR DEVELOPMENT
DOI:
https://doi.org/10.26565/2410-7360-2015-43-02Keywords:
groundwater, gas-condensate deposits, wells drowning, gas reserves, development rates, rates of gas production, gas recovery ratio, rock permeabilityAbstract
The article is devoted to the important water-entry problem of the large gas condensate deposits of the eastern region of Ukraine in the process of developing and extracting the residual gas reserves. We present an analysis of influence of geological factors and the rate of extraction of gas on the results of the development of two large Matviivske field’s deposits - horizon C-5a1 and C-5g2, which differ from one another by permeability, but are similar in physical size, the pore volume and the presence of the active stratal water.
In this article we briefly discuss the hypothesis of the groundwater genesis. It has been concluded that the fact that the two discussed horizons belong to different zones of katagenesis causes substantial differences in their filtration properties. There is the detailed hydrogeological description of the field, proved reserves of deposits, analysis of their engineering. The problem of the sources of the wells drowning was considered.
It is noted that the permeability of the formation directly causes flooding of gas reservoir characteristics in the process of its development. The authors draw attention to the nature of the gas-condensate reservoir depletion during an initial period - in which case maintenance of gas production high rates may lead to high technological and economic indicators.
Mining the remaining gas reserves of these two deposits, supplying with water, is a complex engineering task. It can be solved in two ways: by allowing the dissolution of lateral coning and the drilling of new wells.
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