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Scientific and technical journal

«Oilfield engineering»

ISSN 0207-2351

Oilfield engineering
Long-term prediction of wells operation in gas condensate fields using cubic spline approximation methods

UDC: 622.279:681.5
DOI: -

Authors:

TOLPAEV VLADIMIR A.1,
AKHMEDOV KURBAN S.1

1 Gazprom VNIIGAZ Stavropol, Stavropol, Russia

Keywords: gas, well, permeability, geological and field data, inflow equation, reservoir pressure, bottomhole pressure, depression, flow rate, predicted flow-rate

Annotation:

The authors of the article consider the urgent problem of long-term prediction of wells operation in gas condensate fields, being specially important in the context of growing demand for effective methods of gas production management. An innovative approach based on mathematical modeling and the use of cubic splines to approximate the initial geological and field data is proposed. The main purpose of the study is to improve the accuracy of wells flow-rates prediction, which helps to optimize their operation and increase the efficiency of planning production operations for the next 3...5 years. The authors of the article describe the process of data collection and processing, including the normalized values of the flow rate and the accumulated volume of the extracted gas. Special attention is paid to the methodology of constructing indicator curves reflecting the dependence of the well flow-rate on various factors such as reservoir and bottom-hole pressure as well as depression. The results of the study include the development of mathematical models and algorithms for calculating projected well flow-rates. These results are of practical importance for the gas industry as that allows optimizing the operation processes and increasing the overall efficiency of gas production. The authors of the article also analyze the influence of the stress-strain state of rocks on filtration processes and reservoir permeability, which additionally contributes to the accuracy of forecasts.

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