Method and device for identifying communicating channel in oil reservoir

By establishing the relationship between porosity and permeability of the reservoir reservoir, performing wave impedance inversion, identifying the reservoir connection path, the problem of low recovery rate in old oil fields is solved, and the accurate positioning of the inter-well communication structure is achieved, and the recovery rate is improved.

CN120233424APending Publication Date: 2025-07-01PETROCHINA CO LTD
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Patent Information

Application Number
CN202311830657.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-12-28
Publication Date
2025-07-01

AI Technical Summary

Technical Problem

The existing technology cannot accurately identify the reservoir connection path, resulting in the inability to effectively improve the recovery rate of old oil fields.

Method used

By obtaining the seismic data, logging acoustic wave data, logging density data, logging porosity data and logging permeability data of the target reservoir, establish the relationship between pore and permeability of the pore reservoir and crack reservoir, perform wave impedance inversion, identify the wave impedance data of the pore and crack reservoir, inversion obtains the pore and permeability bodies of the pore and crack reservoir, and identify the target connection path.

Benefits of technology

Accurately identify reservoir connection paths and determine inter-well communication structures to improve reservoir recovery.

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Abstract

The invention provides a method and a device for identifying a connected channel in an oil reservoir, and the method comprises the steps: carrying out the intersection fitting of logging porosity data and logging permeability data of a target oil reservoir, building the relation between the porosity and the permeability of a hole reservoir and the relation between the porosity and the permeability of a fractured reservoir, and obtaining the connected channel of the target oil reservoir; establishing a relationship between the wave impedance of the hole reservoir and the porosity and a relationship between the wave impedance of the fracture reservoir and the porosity; performing wave impedance inversion from the seismic data to obtain wave impedance data of a hole reservoir and wave impedance data of a fracture reservoir; and carrying out inversion to obtain a hole reservoir porosity body and a fractured reservoir porosity body so as to identify a target communication path. According to the scheme, the technical problem that the oil reservoir communication path cannot be accurately recognized in the prior art is solved, and the technical effect that the oil reservoir communication path is accurately recognized to determine the inter-well communication structure so as to improve the oil reservoir recovery efficiency is achieved.
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