Sedimentary facies identification method, device and system

Abstract

The invention relates to a sedimentary facies identification method, device and system, and belongs to the technical field of oil-gas field development geology. The identification method comprises the following steps: carrying out ancient landform recovery on a research area to obtain an ancient landform map after deposition of the research area; converting the ancient landform map into a vector structure map; selecting a calculation section on the vector structure map along the object source direction; selecting a plurality of deposition points on the calculation profile, including the highest deposition point; obtaining gradient and horizontal displacement of each deposition point relative to the highest deposition point according to the coordinates of each deposition point; performing staged fitting on the gradient and the horizontal displacement of each deposition point relative to the highest deposition point, finding out inflection points between stages, and taking a gradient value at the inflection points as a critical gradient value; and identifying each sedimentary facies according to the critical gradient value. According to the method, the accuracy of sedimentary facies identification is improved, the boundaries between the sedimentary facies can be quantitatively found out through the critical gradient values, and the sedimentary facies region is accurately divided.

Description

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AI Technical Summary

Benefits of technology

This technology describes a new way to identify depositional structures such as fault lines or fractures during petroleum exploration. It does this without requiring detailed knowledge about how these structures were formed beforehand because it identifies them based only upon their location within the basin where they are located. By comparing existing data sets obtained under specific conditions (such as temperature) against those already known, we have developed a more accurate technique called Deposit Threatonization Identification System which helps predicting key areas related to hydrocarbon accumulation.

Problems solved by technology

Technologies described include traditional techniques such as open pit mineral prospecting and stratigraphy. However, they have limitations that limit their effectiveness and usefulness across various fields like petroleum exploitation and environmental monitoring. These technical problem addressed by the present inventors involve improving upon existing technics used during field investigations due to challenged areas' lack of knowledge about sedimentation basin structures and associated features.

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