Natural gas filling semi-quantitative determination system and method suitable for low-abundance gas reservoir

Abstract

The invention belongs to the technical field of information processing, and discloses a natural gas filling semi-quantitative determination system and method suitable for a low-abundance gas reservoir. The method comprises the following steps of determining a filling mode of natural gas according to the development conditions of faults and cracks, the sand body superposition relationship between upper and lower stratums and the distance of main hydrocarbon source rock; reflecting the buoyancy formed by the longitudinal continuous hydrocarbon column and the power consumed by transverse migration from the ratio of the vertical migration distance to the horizontal migration distance in the filling path from the main hydrocarbon source filling point to each well point; reflecting the power consumption degree caused by the capillary pressure difference in the sand body from the ratio PD of the range of the constructive diagenetic phase region to the range of the destructive diagenetic phaseregion in the region where the main hydrocarbon source filling point to each well point filling path passes; and through parameter calculation, compiling a contour map, and determining the region with the strongest filling power and the minimum filling resistance as a natural gas dominant filling region. Compared with a traditional oil-gas migration theory, the method is finer and more suitable for evaluation of a single gas field.

Description

technical field [0001] The invention belongs to the technical field of information processing, and in particular relates to a semi-quantitative measurement system and method for natural gas filling suitable for low-abundance gas reservoirs. Background technique [0002] At present, the closest existing technology: in the process of oil and gas exploration and development, for natural gas reservoirs with low structural relief and close to hydrocarbon generation centers, the charging abundance is often low due to the difference between gas and water. The prediction of favorable areas for oil and gas exploration in these areas is difficult to accurately delineate according to the general accumulation theory, and there is no basis for determining the well location. There are very few high-yield wells, and most of them fail. It is critical for this type of gas reservoirs to explore a practical method that can better guide the deployment of oil and gas development wells in the nex...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: in the process of oil and gas exploration and development, it is difficult to accurately delineate the favorable areas for oil and gas exploration according to the general accumulation theory for natural gas reservoirs with low structural relief and close to the hydrocarbon generation center

Images