13 results about "Vitrinite" patented technology

This invention provides a method, system, and computer equipment for predicting the maturity of shale and mudstone reservoirs through well logging. By analyzing the total porosity and total organic carbon content of shale and mudstone cores from different regions, this invention obtains a mathematical relationship between relative porosity and total organic carbon content. This mathematical relationship reflects the porosity-enhancing efficiency of organic matter and reveals a close relationship between this efficiency and vitrinite reflectivity, which reflects the thermal maturity of organic matter. As maturity increases, the porosity-enhancing efficiency of reservoir organic matter decreases. Therefore, the maturity of shale and mudstone reservoirs can be predicted and evaluated based on the porosity-enhancing efficiency of organic matter. Based on this, this invention establishes a "three-parameter" chart using data on total porosity, total organic carbon content, and vitrinite reflectivity of shale and mudstone from different regions. By processing the data in the area to be tested, the mathematical relationship between relative porosity and total organic carbon content of the shale and mudstone reservoir is obtained. Combined with the "three-parameter" chart, the organic matter maturity can be determined, providing a reference for reservoir evaluation and prediction.

The invention discloses a coal rock longitudinal wave anisotropy coefficient logging determination method, device and equipment, and the method comprises the steps: obtaining the continuous depth vitrinite reflectivity of coal rock based on a logging curve of the coal rock; and determining the continuous depth longitudinal wave anisotropy coefficient of the coal rock according to the continuous depth vitrinite reflectance of the coal rock and the incidence relation between the longitudinal wave anisotropy coefficient of the core sample of the coal rock and the vitrinite reflectance of the core sample, which is pre-constructed based on an experimental analysis method. According to the method, aiming at the problem of coal rock stratum longitudinal wave anisotropy evaluation, the function relation between the longitudinal wave anisotropy coefficient and the vitrinite reflectivity is creatively established through anisotropy cause analysis, and then logging information is used for continuous deep processing, so that the coal rock longitudinal wave anisotropy coefficient logging calculation method is formed. The method provided by the invention mainly aims at a coal rock stratum, and can provide necessary parameters for coal rock anisotropy characteristic analysis, crustal stress calculation and the like.

The invention discloses a quantitative prediction method for a coal-rock gas favorable area. The quantitative prediction method comprises the following steps: S1, collecting coal-rock underground core samples and cover rock core samples of a coal seam which is deeper than 2000m in different areas of a coal-containing basin; s2, measuring the vitrinite reflectivity, the vitrinite content, the porosity and the permeability of the underground rock core sample; s3, measuring the porosity, the permeability, the breakthrough pressure and the diffusion coefficient of the cap rock core sample, and statistically analyzing contribution weights of five evaluation indexes of the coal seam thickness, the porosity, the permeability, the breakthrough pressure and the diffusion coefficient to the sealing capacity based on the measured data to obtain a sealing index S; s4, statistically analyzing the contribution weights of the coal seam thickness, the vitrinite reflectivity, the vitrinite content, the porosity and the permeability measured in the step S2 and the sealing index S to the sealing capacity, and establishing a quantitative calculation formula of an enrichment index E; and S5, performing coal rock gas favorable area evaluation based on the enrichment index E.

The invention provides an organic matter-rich rock hydrogen production potential evaluation method and analysis equipment, and relates to the technical field of geological resource development. Comprising the following steps: carrying out thermal evolution simulation on organic matter macromolecular models of vitrinite samples with different maturity degrees, and determining the maximum hydrogen content and the maximum carbon dioxide content generated by cracking of the vitrinite samples evolved to different maturity degrees; carrying out isothermal adsorption experiments on the vitrinite samples with different maturity degrees, and determining the carbon dioxide adsorption quantity in the vitrinite samples with different maturity degrees; based on a pre-established hydrogen generation and carbon dioxide sequestration evaluation model, the maximum hydrogen content and the maximum carbon dioxide content generated by cracking of the vitrinite samples of different maturity, and the hydrogen content generated in the inorganic evolution process of the vitrinite samples of different maturity, the maximum carbon dioxide content and the maximum hydrogen content are evaluated. And determining the optimal maturity interval of hydrogen production according to the carbon dioxide adsorption quantity in the vitrinite samples with different maturity degrees. According to the invention, accurate quantitative evaluation of the underground in-situ hydrogen production potential can be realized.

This invention relates to a method for refining and classifying coking coal based on petrographic and matrix strength, comprising: determining the petrographic composition of the coking coal; placing the prepared sample in a dry distillation reactor for dry distillation reaction; pulverizing; taking a sample with a weight of M0 and placing it in a type I rotary drum for a rotational experiment, then sieving and recording the weight of coke particles larger than 0.2 mm as M1; calculating the matrix strength I. cb = (M1 / M0)*100%; based on the vitrinite content V and matrix strength I in the coal and petrographic composition. cb This invention enables the detailed classification of coking coal. It can quickly distinguish between coking coal types with similar conventional coal quality indicators and further classify them, providing a reliable basis for coking coal quality evaluation and blending guidance. The method is simple, reliable, low-cost, and timely, making it suitable for coal and coking enterprises and possessing broad application value.

This invention relates to a method for predicting the early and mid-stage production of coalbed methane wells in medium- to high-rank coal reservoirs. The method includes: determining whether the coalbed methane well is located in a medium- to high-rank coal reservoir based on the average random reflectance of the vitrinite group; obtaining reservoir parameters of the medium- to high-rank coal reservoir where the well is located, including the well point gas content, reservoir stratigraphic coefficient, and well structural location; establishing a geological potential evaluation model for the well based on these parameters; denoising the gas production data; obtaining the critical analytical pressure of the reservoir and the bottomhole flowing pressure after the well production has stabilized; calculating the apparent analytical coefficient of the well; and establishing a drainage potential evaluation model for the well; and using the denoised production data from the geological potential evaluation model and the drainage potential evaluation model, a comprehensive early and mid-stage production prediction model is established. This method can adjust and update the fitting coefficients in real time based on field production data, and is simple, convenient, fast, and has high prediction accuracy.

The invention relates to the field of oil-gas exploration, and discloses a method for determining an effective gas source rock exhaust threshold by using a delta13C1-Ro relationship, and the method comprises the steps: obtaining corresponding vitrinite reflectance of an effective gas source rock stratum section at different buried depths, and drawing an evolution curve of the vitrinite reflectance with respect to the buried depths; obtaining the methane stable carbon isotope composition of the found natural gas in the research area; natural gas causes and sources are judged, and natural gas from the effective gas source rock stratum section is screened out; establishing a relationship between natural gas methane stable carbon isotope composition from the gas source rock and vitrinite reflectivity, and drawing a change curve; and determining the exhaust threshold of the effective gas source rock stratum section by utilizing the screened natural gas methane stable carbon isotope composition value in combination with the evolution curve and the change curve. According to the method, the accuracy and the pertinence of determining the exhaust threshold are improved based on actual geochemical data inversion.

This invention discloses a method and system for coal facies identification in deltaic-tidal flat-lagoon coal seams, relating to the field of quantitative coal facies identification technology. The method includes: collecting Late Paleozoic coal samples and extracting measurement parameters; classifying primary coal facies types based on the measurement parameters, statistically analyzing the consistency of the discrimination results, and determining the reliability of the primary coal facies type classification; for Late Paleozoic deltaic-tidal flat-lagoon coal seams, using the subtypes of vitrinite within the coal seam and microscopic components directly related to vegetation as the analysis objects, obtaining revised TPI and VI, classifying secondary coal facies types, and determining the reliability of the secondary coal facies type classification; obtaining the final reliability by productting the reliability of the primary coal facies type classification with the reliability of the secondary coal facies type classification. This invention employs a multi-angle, multi-parameter cross-validation approach to classify coal facies, effectively avoiding the subjective bias of a single method, making the identification results more comprehensive and closer to geological reality.

The invention discloses preparation of a multi-coal-type synergistic fast-charging graphite negative electrode material and a lithium ion battery, and belongs to the technical field of ion battery negative electrode materials. According to the method, various coal sources which are low in cost and rich in reserves are adopted as raw materials, and the characteristics that coal is filled with various structural defects in a thermodynamic high-energy state, volatile components in the coal easily form pores, the vitrinite graphitization temperature is low, the inertinite aromatization degree is high, the graphitization temperature is high and the like are fully utilized; the preparation of the artificial graphite with simple process and mild conditions is realized, the industrial amplification difficulty is greatly reduced, and the method is a technical route with great cost advantage.

A dynamic analysis method for the reflectance of vitrinite in continental hydrogen-rich shale based on normally distributed activation energy is proposed for oil and gas exploration and development, solving the problem that the existing Easy%Ro model is not suitable for the evolution analysis of vitrinite in continental hydrogen-rich shale. This invention includes: S1, a calibration method for the dynamic model of reflectance of vitrinite in continental hydrogen-rich shale; including a calibration method for the reaction dynamics model of vitrinite in hydrogen-rich shale based on in-situ thermal evolution simulation experiments or a calibration method for the reflectance dynamics model of vitrinite in hydrogen-rich shale based on paleothermal evolution history; S2, a forward modeling prediction method for geothermal evolution history based on the reflectance dynamics of vitrinite in continental hydrogen-rich shale. This invention establishes the SL_Ro model by obtaining data from in-situ thermal evolution experiments, which is more suitable for describing the reflectance evolution process of vitrinite in continental hydrogen-rich shale compared to the traditional Easy%Ro analysis method based on discrete distributed activation energy chemical kinetic models and exponential conversion relationships.

The invention belongs to the technical field of coal vitrinite reflectance detection, and particularly relates to a coal vitrinite reflectance identification method, which is characterized in that the initial reflectance of a coal sample measured by a reflectance detection instrument is compensated based on the evaluation result of the influence brought by the test temperature to obtain the accurate vitrinite reflectance; the method comprises the following steps: firstly, performing compensation on the coal vitrinite reflectivity, secondly, performing evaluation calculation on an accurate abnormal coefficient of the vitrinite reflectivity obtained after compensation, and finally, calculating multiple groups of vitrinite reflectivity with qualified abnormal coefficient evaluation calculation, so that in the process of detecting the vitrinite reflectivity of the coal, not only is the influence brought by test temperature considered, but also the detection accuracy is improved. The abnormal influence of the impurities locally accumulated in the coal on the detection result is more comprehensively considered, and the comprehensiveness and accuracy of the detection result can be effectively improved by effectively and organically combining the influence of the test temperature and the influence of the impurities locally accumulated in the coal on the detection result in the same evaluation system.

The embodiment of the present application provides a shale source-reservoir evaluation method and device, solves the problem that the existing evaluation method cannot effectively and intuitively reflect the source-reservoir configuration of over-mature shale samples. The shale source-reservoir evaluation method provided by the embodiment of the present application comprises the following steps: obtaining parameter information of first shale samples; obtaining original source-reservoir coupling coefficients of all the first shale samples based on the parameter information of the first shale samples; obtaining second shale samples based on the source-reservoir coefficients of the first shale samples; obtaining the average value of vitrinite reflectivity of all the second shale samples; obtaining the source-reservoir coefficients of all the first shale samples based on the average value of vitrinite reflectivity of the second shale samples and the source-reservoir coefficients of the first shale samples; and performing source-reservoir evaluation on shale based on the source-reservoir coefficients of all the first shale samples.

The present application belongs to the field of oil and gas exploration and development, and particularly relates to a method for judging organic matter maturity. The method uses Raman spectrum characteristics of organic matter to calculate vitrinite reflectance in different cases. First, relevant characteristic parameters with strong correlation are selected to be fitted with vitrinite reflectance. Then, according to the inflection point between the characteristic parameters and vitrinite reflectance at different thermal evolution stages, i.e. the critical point of vitrinite reflectance, different fitting regions are divided, and the relationship formula with high fitting correlation coefficient in the region is taken as a discrimination formula. Therefore, the more relevant judgment formula can be directly applied in different intervals according to the characteristic parameter values obtained in the target area and the critical point, so as to calculate the vitrinite reflectance which is more consistent with the actual value, and make the judgment of the organic matter maturity in the target area more accurate. Therefore, the method can be widely applied in high thermal evolution basins, thereby overcoming the influence of high thermal evolution test inaccuracy and no vitrinite and other elements.