ПРОГНОЗ ПАРАМЕТРІВ ВУГЛЕВОДНЕВИХ СИСТЕМ ВНУТРІШНЬОЇ ЗОНИ ПЕРЕДКАРПАТСЬКОГО ПРОГИНУ

Abstract

The regional forecast of formation hydrocarbon systems for gas fields of the Inner Zone Pre-Carpathian Depression has been made, the company has conditionally allocated 6 areas within which individual fields and their structural blocks are located. The dependences of the distribution of different types of hydrocarbon systems have been established, which makes it possible to predict them at great depths in the region of high temperatures and pressures at the initial stages of exploration works. The peculiarity of establishing the forecast indicators is that the thermobaric parameters of the reservoir and the physical parameters of the reservoir oil are considered as combined average values in a single, integral Inner Tectonic Zone. The specifics of changes in each of them were also uniform and were forced to extend over the entire territory of the zone. The depths of fluid replacement were estimated by extrapolating the averaged curves G = f (H). When such curves, universal for a large region, are used in practice, the reliability of finding the values of specific parameters is reduced to a certain extent. This is not enough for the current stage of fundamental study of the oil and gas potential of the Carpathian region. High reservoir temperatures only increase the intensity of the fluid separation process. As a result, the recovery of conventional oils from deposits remains low, and in cases of development of transitional oils, very low. In addition, there is an important and currently poorly understood problem of reservoir structure strength. When developing oil deposits in any mode (elastic or dissolved gas), reservoir pressure inevitably decreases.

Graphs was built and the regression equations of the forecast parameters was derived, which are included in the formula for calculating hydrocarbon reserves by the volumetric method, relative to the depths of deposits. The regression equations for prediction in combination with laboratory studies of thermobaric conditions (pressure and temperature) with depth was derived, because information about them is needed to calculate individual parameters of hydrocarbon systems.