Establishing method and system of three-dimensional geomechanical field of extra-deep carbonate reservoir

Abstract

The invention provides an establishing method and a system of a three-dimensional geomechanical field of an extra-deep carbonate reservoir. The method includes: establishing a seismic stacking velocity field including three-dimensional coordinate information according to basic data of a seismic work area; calculating the layer velocity of an edge layer according to the seismic stacking velocity field and seismic interpretation result horizon data, determining the corresponding seismic average speed according to the layer velocity, and obtaining the seismic average velocity field; according to the seismic grid coordinate range of the seismic work area, performing three-dimensional data interpolation of the seismic average velocity field via seismic interpretation horizon control, and obtaining the seismic three-dimensional velocity field; and according to the seismic three-dimensional velocity field, determining lithological physical parameters, calculating the formation pressure and the geological stress of the seismic work area, and establishing the three-dimensional geomechanical field. According to the method and the system, the lithological physical parameters are determined by employing the three-dimensional velocity field obtained by the combination of seismic data and logging data, the obtained formation pressure and the geological stress are more accurate, and more accurate three-dimensional geomechanical field can be established.

Description

technical field [0001] The invention belongs to the field of geophysical exploration, and in particular relates to a method and system for establishing a three-dimensional geomechanical field of an ultra-deep carbonate reservoir. Background technique [0002] Accurately establishing a three-dimensional geomechanical field is the basis of drilling engineering design and construction, and is an indispensable key data for determining the drilling well structure, drilling fluid density, drilling control and completion processes. Only by accurately grasping the geomechanical field parameters can we take targeted oil and gas layer protection technical measures, and it plays an important role in ensuring the safety of drilling construction and reducing operational risks. [0003] In the prior art, people usually only calculate the parameters of the geomechanical field based on the acoustic logging data and density logging data in the geophysical logging data. There is a gap in the ...

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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a method and system for establishing a three-dimensional geomechanical field in an ultra-deep carbonate reservoir to overcome the relatively low accuracy of the geomechanical field established by the existing method for establishing the geomechanical field. poor defect

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