A system for direct analysis and comparison of oil source of millimeter-scale samples in tight reservoirs

Abstract

A system for direct analysis and comparison of oil sources in millimeter-scale samples of tight reservoirs. The main purpose is to provide a device, which can obtain the C 1 ~C 40 Hydrocarbon fingerprints and related geological experiment parameters. It is characterized in that it includes a carrier gas hose, a pyrofurnace, a pyrotube, a U-shaped enrichment tube, a heat trap, a cold trap, a first temperature controller, a second temperature controller and a gas chromatograph; a carrier gas hose It is connected with the thermorelease tube; the heat trap or the cold trap is used to place the U-shaped enrichment tube; the outlet end of the U-shaped enrichment tube is connected with the capillary column in the gas chromatograph; the heat trap and the cold trap are respectively used for the carrier gas to carry heat When releasing hydrocarbons through the U-shaped enrichment tube, the high-temperature heating release or low-temperature freezing enrichment of hydrocarbons; the gas chromatograph includes a capillary column, FID detector, and a chemical workstation; the inlet end of the capillary column passes through the pipeline and the U-shaped enrichment tube. The outlet end of the tube is connected, the outlet end of the capillary column is connected with the FID detector, and the FID detector is connected with the chemical workstation through the communication interface.

Description

technical field [0001] The invention relates to a device used in oil and gas geological experiments, in particular to a device capable of directly analyzing and comparing millimeter-level sample oil sources in tight reservoirs, and belongs to the field of unconventional oil and gas formation mechanism and exploration. Background technique [0002] In recent years, unconventional oil and gas resources such as tight sandstone oil (referred to as tight oil), tight conglomerate gas (referred to as tight gas), mud shale oil, shale gas and other unconventional oil and gas resources have achieved large-scale development, pushing the global oil industry into the conventional and unconventional oil and gas industry. A new stage of equal emphasis on resources. Tight oil has the characteristics of symbiosis of oil source layer and reservoir, centimeter-millimeter scale tight sandstone and mudstone, and has the characteristics of low resource abundance, poor reservoir quality and strong...

AI Technical Summary

Problems solved by technology

The system can heat and release the hydrocarbons in the millimeter-scale tight reservoir rock samples, which are carried by the carrier gas, frozen and enriched, then heated and released, and then enter the gas chromatograph and capillary column for separation. After detection by the detector, the tight reservoir and C in centimeter-millimeter band 1 ~C 40 Hydrocarbon fingerprints and related geological experiment parameters are used for direct analysis and comparison of oil sources in tight reservoirs (especially source-reservoir micro-assemblages) and oil-bearing evaluation, and provide direct geological experiments for the study of the formation mechanism of unconventional tight oil and shale oil. It solves the problem that the crude oil source and oiliness cannot be evaluated in the source-reservoir micro-assemblage of unconventional tight reservoirs, and plays an important guiding role in the exploration and deployment of tight oil and shale oil "sweet spot" optimization to meet the needs of unconventional tight reservoirs. The purpose of fine exploration of oil and shale oil on geological experiment technology requirements

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