Heterogeneous reservoir high-water-content horizontal well water invasion process inversion method and device

Abstract

The invention provides a heterogeneous reservoir high-water-content horizontal well water invasion process inversion method and device, and the method comprises the steps: building a high-water-content horizontal well water invasion process physical model according to the characteristics of a high-water-content horizontal well water invasion process in a heterogeneous reservoir; establishing a water invasion volume mathematical model of the heterogeneous horizontal section of the high-water-content horizontal well according to the physical model of the water invasion process of the high-water-content horizontal well, and determining the corresponding water invasion volumes of the heterogeneous horizontal section at different time; and establishing an implicit expression of the water invasion height and time according to the water invasion volumes corresponding to the heterogeneous horizontal section at different times, and determining the water invasion heights at different moments. Aiming at the heterogeneous condition of the horizontal section of the heterogeneous reservoir high-water-cut horizontal well, the problems that an existing horizontal well water invasion inversion method is not suitable for the heterogeneous condition of the horizontal section and cannot achieve water invasion height inversion are solved, and accurate and complete inversion of the high-water-cut horizontal well water invasion process is achieved. The method and device have important significance in improving the treatment level of the high-water-content horizontal well.

Description

technical field [0001] The invention relates to the technical field of water control in high-water-cut horizontal wells in reservoir development and adjustment, in particular to an inversion process of water invasion in high-water-cut horizontal wells in heterogeneous reservoirs. Background technique [0002] This section is intended to provide a background or context for implementations 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] Compared with vertical wells, horizontal wells have the advantages of high oil production index, small production pressure difference, and long water-free oil production period. However, with the prolongation of development time, some problems have gradually been exposed in the production of horizontal wells: the water content of horizontal wells after water breakthrough The oil production rate has risen rapidly, and the oil production has dropped ...

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Problems solved by technology

[0003] Compared with vertical wells, horizontal wells have the advantages of high oil production index, small production pressure difference, and long water-free oil production period. However, with the prolongation of development time, some problems have gradually been exposed in the production of horizontal wells: the water content of horizontal wells after water breakthrough The oil production rate has risen rapidly, and the oil production has dropped sharply. Some horizontal wells even see water just after they are put into production, which seriously affects the development effect of horizontal wells.

Therefore, it is necessary to establish an inversion method for the water-invasion process of high-water-cut horizontal wells in heterogeneous reservoirs to solve the problem of fast and accurate calculation of the water-invasion volume and water-invasion height corresponding to different times in the heterogeneous horizontal section

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