Novel method for quantifying shale organic matter swelling oil and experimental device thereof

Abstract

The invention belongs to the technical field of petrochemical engineering, and discloses a novel shale organic matter swelling oil quantification method and an experimental device thereof, and experimental device preparation, sample preparation, experimental early-stage preparation, swelling experiment and experimental data processing are carried out. The method comprises the following steps: performing kerogen enrichment on shale samples in different maturity stages, performing a swelling experiment on the enriched kerogen samples with different maturity degrees, calibrating and optimizing swelling model parameters according to a swelling ratio obtained by the experiment, and further predicting the swelling crude oil amount of the kerogen with different maturity degrees by using crude oil family components. According to the method, the swelling models of the kerogen with different maturity degrees are established based on the swelling experiments of the kerogen with different maturity degrees by virtue of an experimental method, so that the swelling oil amount of the kerogen under different maturity degrees is determined, the swelling oil amount of the kerogen can be obtained more accurately, and the method is more in line with the actual geological condition; and help is provided for continental facies shale oil resource evaluation in China.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a new method for quantifying shale organic matter swelling oil and an experimental device thereof, in particular to a method for evaluating the amount of kerogen swelling oil with different maturity by using the height method. Background technique [0002] At present, shale oil exploration and development is considered to be an important strategic measure to solve the shortage of oil and gas resources. my country's shale oil resources are also very rich and have great prospects for exploration and development. The amount of shale oil resources is closely related to the hydrocarbon retention capacity of shale. The hydrocarbon retention capacity of shale can be divided into two parts: the hydrocarbon retention capacity of kerogen and the hydrocarbon retention capacity of inorganic minerals. The organic hydrocarbon retention capacity includes the hydrocarb...

AI Technical Summary

Problems solved by technology

However, there are disadvantages in this prior art: this method uses molecular simulation to establish a kerogen molecular model, but it is not combined with the actual geology, and the calculated amount of swelling oil is only a theoretical value, which has great limitations and cannot Promote use in actual areas

However, this existing technology has disadvantages: different mature samples and kerogen are not natural evolution samples, but are artificially obtained by pyrolysis experiments using gold tubes, which are not exactly the same as natural evolution samples, and the experimental method of swelling is the mass method. The mass method is not supported by theory and formula, and the obtained value is not only the swelling amount, the obtained value is not accurate

However, this existing technology has disadvantages: the number of samples is small and only two samples are not representative, and the samples of different maturity and kerogen are not natural evolution samples, but are artificially obtained by using gold tubes for pyrolysis experiments, which are not the same as natural evolution samples. Not exactly the same, and the experimental method of swelling is the mass method, which is not supported by theory and formulas, and the obtained value is not only the amount of swelling, the obtained value is not accurate

However, this prior art has disadvantages: only a single solvent and a single type of kerogen are used for molecular simulation, and the amount of swelling obtained is only the amount of a specific organic solvent swelled by this specific type of kerogen, which is not scalable on a large scale. And it is not combined with the actual geological conditions, so the practical value is not high

[0011] The existing methods for evaluating kerogen swelling amount do not uniformly and effectively quantitatively calculate the swelling oil amount of kerogen with different maturity, which has great limitations and is not convenient for large-scale promotion

[0012] Existing evaluation methods have obvious limitations in evaluating the amount of kerogen swelling oil in different regions, different maturity levels, and different types. Some methods can only be used to specifically evaluate kerogen in a certain region, and some existing methods The method has high requirements on the sample size and temperature of kerogen, and it is not easy to popularize

Images