Method and device for determining infill well location in complex fault-block reservoir production area

Abstract

The present application discloses a method and device for determining the location of an infill well in the production area of ​​a complex fault-block oil reservoir. The method includes: obtaining a three-dimensional geological model of the production area of ​​a complex fault-block oil reservoir; According to the geological conditions, when drilling in the grid without well points, the number of oil layers drilled by a single well and the actual control area of ​​a single well in each oil layer are determined; according to the actual control area of ​​a single well in each oil layer The number of grids included, the remaining oil saturation of each grid, the residual oil saturation, crude oil density and pore volume determine the remaining movable oil reserves of a single well in each reservoir; the remaining movable oil of all reservoirs is superimposed Reserves, the total remaining movable oil reserves of a single well are obtained; the grid without well points corresponding to the maximum total remaining movable oil reserves is determined as the deployment well location of infill wells. The application can determine the well position of the infill well through a reasonable method, and improve the reserve producing degree of the complex fault block oil reservoir development area.

Description

technical field [0001] The present application relates to the technical field of petroleum exploration and development, in particular to a method and device for determining the location of an infill well in a complex fault-block oil reservoir exploitation area. Background technique [0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] Complex fault-block oil reservoirs have large reserves in the world's oil reserves. The faults in complex fault-block oil reservoirs are numerous and complex, and the oil reservoirs are cut into many fault blocks with different sand bodies. Complex fault-block reservoirs have small and complex oil-bearing areas, have multiple oil-water systems, and each oil-water system has different reservoir characteristics and formation structures, and usually lacks natural energy. Am...

AI Technical Summary

Problems solved by technology

However, the production area of ​​complex fault-block reservoirs is usually small, and generally there is no clear well pattern, so it is difficult to determine the well location of infill wells by conventional methods

Even if there is an obvious well pattern in the production area of ​​complex fault-block reservoirs, there are often multiple oil layers and multiple sets of oil-water systems underground in this area, and infill wells selected and deployed by conventional methods cannot better achieve the purpose of improving the production of reserves

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