The present invention relates to a conception model of a free hydrocarbon discharge critical condition during a source rock evolution process, and a technical method for quantitatively determining the critical condition by adopting four parameters such as the hydrocarbon generation amount, the residual hydrocarbon critical saturation amount, the water-dissolving phase hydrocarbon discharge amount and the diffuse phase hydrocarbon discharge amount. According to the method, when the source rock hydrocarbon generation amount is more than the sum of the residual hydrocarbon critical saturation amount, the water-dissolving phase hydrocarbon discharge amount and the diffuse phase hydrocarbon discharge amount, it is indicated that the source rock enters the free hydrocarbons discharge critical condition; when source rock hydrocarbon generation amount is equal to the sum of the residual hydrocarbon critical saturation amount, the water-dissolving phase hydrocarbon discharge amount and the diffuse phase hydrocarbon discharge amount, it is indicated that the source rock is in the free hydrocarbons discharge critical condition, and the buried depth condition or the evolution degree corresponding to the source rock can characterize the free hydrocarbon discharge critical condition; and when the source rock hydrocarbon generation amount is less than the sum of the residual hydrocarbon critical saturation amount, the water-dissolving phase hydrocarbon discharge amount and the diffuse phase hydrocarbon discharge amount, it is indicated that the source rock does not enter the free hydrocarbon discharge critical condition. According to the present invention, with establishment of the conception model of the free hydrocarbon discharge critical condition and provision of the technical method, the defect of evaluation on source rock quality with the hydrocarbon generation threshold is overcome, and great theoretical technical significance is provided for objective evaluation on resource potential of the source rock and designation of the right oil and gas exploration direction.

Method for determining source rock free hydrocarbon discharge critical condition

The invention provides a petroleum spatial distribution quantitative evaluation chart generation method under reservoir configuration constraint. The method comprises the steps: collecting different types of hydrocarbon source rock samples sequentially according to thermal evolution degree, abundance of organic matter, lithology and organic matter type; carrying out the thermal simulation experiment of the collected samples, quantifying discharged oil and retention oil at each temperature point, employing the organic carbon analysis of residue, Rock-Eval detection, and vitrinite reflectance analysis; drawing an oil discharge rate chart of different types of hydrocarbon source rocks; selecting geological sections of different basins as actual geological samples; densely collecting the hydrocarbon source rocks and storage layer rock core samples and carrying out organic carbon analysis, Rock-Eval detection, vitrinite reflectance analysis and chloroform bitumen quantitative analysis on actual geological sections; drawing an oil discharge rate parameter curve of an actual geological sample; and obtaining the petroleum spatial distribution quantitative evaluation chart generation method under reservoir configuration constraint according to the oil discharge rate charts of different types of hydrocarbon source rocks and the oil discharge rate parameter curve of the actual geological sample.

Petroleum spatial distribution quantitative evaluation chart generation method under reservoir configuration constraint

Solid-fluid coupling pressure controlled hydrocarbon generation and expulsion simulating experimental device

The invention belongs to the technical field of geological mining exploration, and discloses an underground rock forming simulation device. The device is characterized in that the device comprises a sample chamber, a high temperature reactor, an axial pressing structure, an interstitial fluid pressing structure, a product separation and measurement structure and a sensing control unit. The sample chamber is fixed in the high temperature reactor and is used for carrying samples and adjusting the sample temperature. The high temperature reactor is fixed on the axial pressing structure. The axial pressing structure and the sample chamber are cohered. A closed space is formed in the sample chamber. The interstitial fluid pressing structure is communicated with the closed space and is used for injecting or recycling fluid. The product separation and measurement structure is communicated with the closed space and is used for collecting products and carrying out separation measurement. The sensing control unit is connected with the sample chamber, the high temperature reactor, the axial pressing structure, the product separation and measurement structure and the interstitial fluid pressing structure and is used for motion control. The invention further provides a rock forming simulation device of high reliability.

Underground rock forming simulation device

A hot-pressing simulation experimental facility for a whole process of rock formation, hydrocarbon generation and hydrocarbon discharge comprises a high-pressure kettle, a pneumatic valve bank and a mineral water booster pump, wherein an experimental sample chamber for placing experimental samples is arranged in the high-pressure kettle; a heating temperature control box is sleeved on the outside of the high-pressure kettle; a booster column penetrates through the upper end of the high-pressure kettle; the lower end of the high-pressure kettle is connected with a sealed pressing component; the booster column and the sealed pressing component are respectively connected with a booster oil pump; the pneumatic valve bank comprises an upper-row fluid pneumatic valve, a lower-row fluid pneumatic valve and a middle-row fluid pneumatic valve; the upper-row fluid pneumatic valve is connected onto the booster column; the lower-row fluid pneumatic valve is connected onto the sealed pressing component; the middle-row fluid pneumatic valve is connected to the middle of the high-pressure kettle; the upper-row fluid pneumatic valve, the middle-row fluid pneumatic valve and the lower-row fluid pneumatic valve are respectively connected with a pressure-control and blockage-prevention device; and the mineral water booster pump is connected onto the sealed pressing component. A fluid seepage flowing condition and actual geological conditions including influence of the fluid seepage flowing condition to rock formation, hydrocarbon generation and hydrocarbon discharge, hydrocarbon discharge modes and directions, a complex temperature varying process and the like are sufficiently considered. The hot-pressing simulation experimental facility can really simulate the whole process of rock formation, hydrocarbon generation and hydrocarbon discharge under geological conditions.

Hot-pressing simulation experimental facility for whole process of rock formation, hydrocarbon generation and hydrocarbon discharge

The invention provides a separation method for light/heavy hydrocarbons in different occurrent states in a clay level of an argillaceous source rock The separation method comprises the following steps: crushing a fresh part of a core of the argillaceous source rock and soaking and extracting a clay level component; carrying out Soxhlet extraction; saponifying the extraction residues by using a saponifying liquid and respectively extracting the saponified residues by using n-pentane and dichloromethane; pickling the saponified residues by using an acidolysis solution and respectively extracting the pickled residues by using n-pentane and dichloromethane; treating the pickled residues by a HF and HCl mixed liquid and respectively extracting the pickled residues by using n-pentane and dichloromethane; and respectively combining the treatment liquids and the extraction liquids and separating by column chromatography to obtain light/heavy hydrocarbons The separation method for light/heavy hydrocarbons in different occurrent states in the clay level of the argillaceous source rock provided by the invention extremely improves the problem that light hydrocarbons are lost in other methods and can calibrate an occurrent space of hydrocarbons by combining mineral analysis

Separation method for light/heavy hydrocarbons in different occurrent states in clay level of argillaceous source rock

The invention provides a method for researching the main pore size range of shale oil. The method for researching the main pore size range of shale oil comprises the following steps: selecting a series of oil-bearing shale samples in a research unit, and dividing the oil shale sample into three parts which are a sample 1, a sample 2 and a sample 3 respectively; determining the bulk density of theshale by using the sample 1; determining the oil content and the grain density of the shale by using the sample 2; calculating the proportions of pores having different pore sizes by using the sample3; calculating the porosity and the oil saturation of the shale according to the bulk density, the grain density and the oil content of the shale, obtained in experiments; and determining the main pore size range of the shale oil according to the relationship between the oil saturation of the shale and the volume proportion of pores having different pore sizes in the total pore volume of the shale. The relationship between the oil saturation and the proportions of all the pore sizes, established through the method for researching the main pore size range of shale oil can objectively quantitatively research the main pore size range of shale oil.

Method for researching main pore size range of shale oil

The invention relates to a method for detecting petroleum acid in crude oil and chloroform bitumen "A". The method comprises: dissolving polar components in crude oil and chloroform bitumen "A" into dichloromethane; transferring the obtained solution to a test tube; adding a boron trifluoride-methanol solution to the test tube; placing in an ultrasonic cleaning device to carry out oscillation, such that petroleum acid in the sample is subjected to an esterification reaction; after completing the esterification reaction, adding distilled water and dichloromethane to the test tube; placing in the ultrasonic cleaning device to carry out oscillation; taking the test tube, and carrying out standing or centrifugation separation; removing the upper layer aqueous phase; after completely volatilizing the solvent dichloromethane, adopting n-hexane as a solvent to transfer the sample into a Florisil (magnesium silicate) SPE small column, wherein residual hydrocarbons are washed away by using n-hexane, and petroleum acid methyl ester is washed away by using dichloromethane; and carrying out chromatography-mass spectrometry analysis on the two petroleum acid methyl ester sample, wherein rich normal saturated fatty acids (methyl ester) and other acid compounds are detected. The method has the following characteristics that: detection is rapid, and only requires a few hours, the reagents do not contain strong acid and strong alkali, and oil-gas field information can be accurately acquired with the detection method of the present invention.

Method for detecting petroleum acid in crude oil and chloroform bitumen "A"

The utility model provides a solid-fluid coupled pressure-controlled hydrocarbon-generating and expulsing simulated-experiment device A high-pressure kettle of the device comprises a high-pressure kettle main body which is respectively connected with a high-pressure kettle top cover and a high-pressure kettle pedestal, the middle part of the high-pressure kettle is axially provided with a vertical pressured column, a high-pressure pipeline between the high-pressure kettle and a high-pressure buffer with a piston is connected with a three-way valve, the high-pressure buffer is connected with a fluid-pressure control-pump pipeline, and a two-way valve with a switch is connected onto a connecting pipeline of the three-way valve and a gas-sampling device; a stainless-steel piston is arranged in the high-pressure buffer, and distilled water and a simulated formation fluid for controlling the pressure are arranged in cavities at both sides of the stainless-steel piston; and an upper connecting hole and a lower connecting hole on a high-pressure reaction kettle are communicated through a high-pressure pipeline, and the high-pressure pipeline is communicated with the three-way valve

Solid-fluid coupled pressure-controlled hydrocarbon-generating and expulsing simulated-experiment device

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