Method and device for determining microscopic geological characteristics of shale oil and gas reservoirs

Abstract

The invention provides a microscopic geologic feature determining method and device of a shale oil and gas reservoir. The method comprises the steps of carrying out axis dividing on a digital three-dimensional geological body image of the shale oil and gas reservoir; determining the unit area of the three-dimensional geological body image in the horizontal direction where the x axis and the y axis are; and determining the unit height of the three-dimensional geological body image in the z-axis direction. The method has the advantages that the product of the unit area times the unit height serves as the representative elementary volume of the shale oil and gas reservoir and the way of combining the unit area in the horizontal direction and the unit height in the vertical direction in the three-dimensional space of the shale oil and gas reservoir is adopted to ensure that the microscopic geologic feature of the shale oil and gas reservoir can be accurately reflected by the determined representative elementary volume, so that the calculation accuracy of the microscopic geologic feature of the shale oil and gas reservoir is increased and the technical problem that the microscopic geologic feature parameter of the shale oil and gas reservoir, determined in the prior art, is inaccurate is solved.

Description

technical field [0001] The invention relates to oil and gas exploration technology, in particular to a method and device for determining microscopic geological characteristics of shale oil and gas reservoirs. Background technique [0002] Shale oil and gas is an important part of unconventional oil and gas resources, and it is also the focus and hotspot of current oil and gas exploration. Shale oil and gas are mainly enriched in shale oil and gas reservoirs. Different shale oil and gas reservoirs have different microscopic geological characteristics, resulting in great differences in their resource potential and development value. Shale is affected by the depositional environment, and the microscopic geological characteristics There are significant differences vertically and horizontally, which play a very important role in controlling the enrichment and exploitation of shale oil and gas microscopically, but this difference is often easy to study when studying the developmen...

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Problems solved by technology

[0003] In the prior art, the qualitative description of the micro-geological characteristics of shale oil and gas reservoirs tends to be based on perceptual knowledge, ignoring the differences in the horizontal and vertical directions, which often leads to the determination of micro-geological characteristics of shale oil and gas reservoirs. inaccurate features

That is to say, in the prior art, there is a lack of quantitative determination methods for the microscopic geological characteristics of shale oil and gas reservoirs, and there is a technical problem that the accuracy of the determined microscopic geological characteristics of shale oil and gas reservoirs is not high

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