Shallow water delta finger-shaped sand dam reservoir configuration identification method and device, medium and equipment

Abstract

The invention relates to a delta finger-shaped sand dam reservoir configuration identification method and a readable storage medium, and the method comprises the following steps: 1) identifying the macroscopic distribution of a finger-shaped sand dam through well seismic horizon fine calibration, and determining the lateral boundary of the finger-shaped sand dam; (2) establishing a three-dimensional sand body model of the sand body of the finger-shaped sand dam based on the lateral boundary of the finger-shaped sand dam, and determining thickness plane distribution of the sand body of the finger-shaped sand dam; (3) identifying different configuration units in the finger-shaped sand dam through rock electricity calibration; (4) determining plane distribution of different configuration units in the finger-shaped sand dam; and 5) combining the thickness plane distribution of the finger-shaped sand dam sand body with the plane distribution of different configuration units in the finger-shaped sand dam to obtain a finger-shaped sand dam three-dimensional configuration model reflecting the spatial distribution characteristics of the configuration units. According to the delta finger-shaped sand dam reservoir configuration identification method, the macroscopic distribution of the finger-shaped sand dam and the distribution and contact relation of different internal configuration units can be predicted more accurately, and support is provided for exploration and development of an oil and gas reservoir of a shallow water delta finger-shaped sand dam.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a method, device, medium and equipment for identifying the reservoir configuration of a finger-shaped sand bar in a shallow water delta. Background technique [0002] Allen (1977) was the first to realize the importance of reservoir geometry and internal structure research, and Miall proposed the configuration element analysis method in 1985 and defined the reservoir configuration. Later, scholars at home and abroad began to pay attention to the study of internal reservoir architecture, and continuously improved the definition of reservoir architecture. At present, reservoir architecture is generally defined as the geometric shape, scale, direction and overlapping of different levels of constituent units. setting relationship. Compared with the traditional concept of sedimentary facies (combination of sedimentary environment and the characteristics of sedimentary r...

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Problems solved by technology

The macroscopic shape of bar fingers is similar to that of channel sand bodies. Previous studies on channel (meandering rivers, delta plain distributary channels) sand body configuration models and characterization techniques have been done more, but the difference is that they are similar to channel sand bodies. The quantitative geometric relationship (such as width-to-depth ratio, tortuosity, etc.) The contact relationship among them is complex, and the architecture model and characterization technology of channel sand bodies are not applicable

Well data can identify different architectural unit types, but the finger-shaped sand bar appears as a narrow strip, and its width is only 1-2 well spacing. It is difficult to predict its lateral interwell distribution using well data

High-resolution seismic data can identify the macroscopic distribution of bar fingers, but it is difficult to identify the distribution of different structural units inside them

Therefore, there are certain difficulties in the research on the reservoir architecture of shallow water delta finger bar reservoirs, and there is currently a lack of a 3D reservoir architecture characterization technology for shallow water delta finger bar reservoirs

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