Electric heating in-situ mining thin-layer oil shale productivity prediction method

Abstract

The invention belongs to the technical field of energy development, and particularly relates to an electric heating in-situ mining thin-layer oil shale productivity prediction method. The method comprises the following steps that 1, in a horizontal well for in-situ mining of the thin-layer oil shale, n measuring points are selected equidistantly along the well direction, m oil shale stones are taken from each measuring point, and the density of the m oil shale stones is determined to obtain effective equivalent density; 2, the oil content of a mined thin-layer oil shale sample is determined according to an oil content calculation formula, and an average value is calculated; 3, a diffusion model of heat in the oil shale is established according to a heat transfer rule in the oil shale, andtemperature field distribution of the oil shale is solved according to initial conditions, boundary conditions and the like of the oil shale; 4, a mathematical model of the oil shale cracking percentage along with the temperature change is established according to the oil shale cracking conditions; and 5, a thin-layer oil shale productivity prediction model containing factors such as density, oilcontent and temperature field distribution of the thin-layer oil shale is established. The productivity of the mined thin-layer oil shale layer is estimated in advance, and support is provided for obtaining maximum economic benefits.

Description

Technical field: [0001] The invention belongs to the technical field of energy development, and in particular relates to a method for predicting the production capacity of thin-layer oil shale in-situ mining by electric heating. Background technique: [0002] Oil shale is an unconventional oil and gas resource, and its development can greatly alleviate the shortage of oil and gas energy in my country. my country's proven oil shale reserves rank second in the world. At present, surface distillation technology is mainly used in the development and utilization of oil shale, but surface distillation technology has problems such as low utilization rate and environmental pollution. The in-situ mining technology can avoid these problems, so the in-situ mining technology of oil shale has attracted more and more people's attention. In view of my country's special geographical characteristics and oil shale formation conditions, the ultra-thin oil shale layer with a burial depth of le...

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Problems solved by technology

Due to the different positions and degrees of heating in the heating process, the production capacity of oil shale is different, and the oil output of oil shale cannot be measured due to the inability to arrange sensors at any point in the thin oil shale reservoir. An electric heating in-situ Productivity Prediction Method for Thin Oil Shale Exploitation

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