18 results about "Hydrogen index" patented technology

The invention discloses a method, a system, equipment and a medium for evaluating the gas-bearing property of a water-flooded area, and the method comprises the steps: confirming three pieces of quantitatively measured skeleton information and fluid medium information in a time domain through different minerals and fluid components, and calculating a fast neutron scattering cross section according to pulse neutron logging data; carrying out qualitative identification on the gas reservoir by combining the fast neutron scattering cross section and the stratum hydrogen-containing index; according to the fast neutron scattering cross section, the thermal neutron capture cross section, the hydrogen content index and the respective volume content, a linear equation set is established, and the simultaneous equation set is solved to obtain the content of different fluid components in the stratum. The gas reservoir evaluation method solves the problem that a conventional gas reservoir evaluation method is seriously influenced by detection depth, borehole environment, invasion, low contrast ratio and pore fluid properties, and does not depend on conventional logging curves and electrical characteristics.

The application discloses a kind of fluid identification method and system of water-saturated hydrogen index contrast method, calculate reservoir matrix porosity;Electric imaging and double lateral data are combined to calculate rock fracture porosity, and sum matrix porosity to total porosity;Assume that bedrock reservoir pore is water-saturated, select the dynamic skeleton neutron value of the dense layer section of lowest porosity, high resistivity dynamic skeleton as fixed skeleton value, calculate the dynamic skeleton neutron value of the purpose layer in combination with total porosity;According to dynamic skeleton neutron value, calculate water-saturated hydrogen index of research interval;Water-saturated hydrogen index is compared with neutron actual logging value to calculate neutron difference value;In combination with gas production test data, the relationship between acoustic time difference and neutron difference value and the change relationship between matrix porosity and neutron difference value are analyzed using neutron difference value, and the relationship chart of quantitative identification gas-water layer is obtained.The method eliminates the influence of anisotropy, fracture occurrence and the like of bedrock lithology, highlights the characteristics of reservoir gas layer, and can more accurately identify the properties of reservoir fluid.

The present invention describes a petrophysical modeling method that integrates well nuclear spectroscopy data and interpretations with some input petrophysical parameters, decomposing the hydrogen and chlorine signals into their specific origins, such as well drilling fluid, kerogen, water, and hydrocarbons in the pores. The model consists of a set of equations that are solved sequentially with input values defined by Monte Carlo simulation, from which properties such as salinity, porosity, density, sigma, and hydrogen index of the kerogen are calculated. The acceptability of such results is verified by comparison with logs such as density, porosity by NMR, and macroscopic cross section of thermal neutron capture.

The invention relates to the technical field of hydrocarbon source rock evaluation standard establishment methods, in particular to a hydrocarbon source rock evaluation standard establishment method based on rock pyrolysis, which comprises the following steps: based on five original parameters obtained by pyrolysis, calculating six derived parameters including total organic carbon content, hydrogen index, hydrocarbon source rock oil production rate, hydrocarbon potential, effective carbon content and residual carbon content; establishing an evaluation standard of the hydrocarbon source rock according to the organic matter abundance, the organic matter type and the maturity, wherein evaluation parameters of the organic matter abundance comprise the total organic carbon content and the hydrocarbon production potential quantity; the evaluation parameters of the organic matter type comprise a hydrogen index and a hydrocarbon source rock oil generation rate; the maturity evaluation parameters comprise a pyrolysis temperature peak value of kerogen cracked hydrocarbon. According to the method, the evaluation standard of the hydrocarbon source rock is established, evaluation is carried out from the three aspects of organic matter abundance, organic matter type and maturity, technical guarantee is provided for exploration, development and evaluation of the hydrocarbon source rock, and the method is particularly suitable for evaluation of tight oil hydrocarbon source rock.

According to the source rock contribution rate processing method for the strong heterogeneous shale bed, the electronic equipment, the storage medium and the program product provided by the embodiment of the invention, the micro-migration hydrocarbon amount of the rock core sample is obtained by quantitatively calculating the original hydrogen index and the current hydrocarbon generation potential value of the rock core sample; therefore, accurate quantitative evaluation on the hydrocarbon discharge amount of the rock core sample is realized. Furthermore, on the basis of the high-precision core sample micro-migration hydrocarbon amount, a discharged hydrocarbon sample is selected, and a shale layer is averagely divided, so that the heterogeneity of the shale is eliminated, the average discharged hydrocarbon amount and the total contribution value of each layer of the shale are accurately calculated, and the relative contribution rate of each layer of the shale is accurately obtained.

The application discloses a kind of based on flushing zone residual oil and gas saturation reservoir category determination method, it is related to well logging interpretation technical field, steps are by conventional well logging to obtain neutron, density logging data;Residual oil and gas of flushing zone is obtained density;Calculate the hydrogen index of residual oil and gas of flushing zone;Residual oil and gas of flushing zone is obtained neutron apparent porosity and density apparent porosity;According to the logging response model of neutron and density in oil and gas reservoir, establish the mathematical model of residual oil and gas saturation of flushing zone, combine shale corrected neutron porosity and density porosity, calculate the residual oil and gas saturation of flushing zone, and when exceed specified index, define as gas layer.The application can obtain residual oil and gas saturation of flushing zone by using conventional neutron and density logging related data, which is less affected by geological factors, so that the calculation of residual oil and gas saturation of flushing zone is more accurate, the evaluation of reservoir gas content is more accurate, and the application range is more extensive.

A method and apparatus for evaluating volumes of discharged hydrocarbon and externally charged hydrocarbon in a mud shale. The method comprises: determining a hydrogen index and a current hydrocarbon generation potential parameter of a mud shale in target block based on total organic carbon test data and pyrolysis analysis test data of the mud shale; determining an original hydrogen index of the mud shale based on the hydrogen index and the pyrolysis analysis test data; and evaluating a volume of discharged hydrocarbon and a volume of externally charged hydrocarbon in the mud shale based on the current hydrocarbon generation potential parameter and the original hydrogen index.

The invention relates to the technical field of hydrocarbon source rock infrared spectrum analysis, in particular to a hydrocarbon source physical property interpretation system and method based on infrared spectrum absorption characteristics, and the system comprises a spectrum data acquisition module, a characteristic separation module, a physical property mapping module and a geological interpretation module. The feature separation module controls a convolutional neural network to decouple a mineral interference absorption peak through a second derivative spectrum saddle point threshold, a dynamic interference database is combined with a transfer learning mechanism to adapt to regional mineral combination changes, and organic functional group separation features with clay interference labels and half-peak width quantized values are output. The physical property mapping module activates horizon specificity correction based on three-dimensional coordinates and two-factor verification, and dynamically adjusts inversion parameters of total organic carbon and hydrogen indexes. And the geological interpretation module updates a mineral template threshold according to a hydrocarbon yield inversion result, particle swarm optimization algorithm output drives convolutional neural network weight cross-cycle iteration, and a closed-loop optimization system for cooperative enhancement of spectral decoupling precision and geological model convergence is formed.

The invention belongs to the technical field of welding materials, and particularly provides a high-toughness welding rod for backing welding, the high-toughness welding rod for backing welding comprises a core wire and a coating wrapping the core wire, and the coating comprises, by weight, 40-46% of CaCO3, 20-25% of CaF2, 5-8% of TiO2, 8-12% of SiO2, 7-9% of Si-Fe, 4-7% of Mn, 1-3% of CeO2, 0.5-1% of Ni and the balance iron powder. The high-toughness welding rod for backing welding is a high-toughness basic welding rod with a low-hydrogen potassium-sodium coating, welding spatter is small, forming is attractive, deslagging is easy, all-position welding can be conducted, single-face welding and double-face forming can be achieved during backing welding of a welded pipeline, the diffusible hydrogen content is low, and the welding state and heat treatment state performance is excellent; and the impact energy at the low temperature of-50 DEG C can be ensured to be more than 100J. A diffusible hydrogen mercury method test result [H] of deposited metal is less than or equal to 5mL / 100g, and the index requirement of ultra-low hydrogen is met. The method is suitable for 50Kg-level maritime work matched backing welding, and can be used for backing welding, repairing and the like of pipeline steel and alloy steel.

The invention discloses a reservoir category judgment method based on residual oil and gas saturation of a flushing zone, and relates to the technical field of well logging interpretation, and the method comprises the following steps: obtaining neutron and density well logging data through conventional well logging; acquiring the density of residual oil gas in the flushing zone; calculating a hydrogen-containing index of residual oil gas in the flushing zone; the neutron apparent porosity and the density apparent porosity of the residual oil gas in the flushing zone are obtained; according to the logging response model of the neutrons and the density in the oil-gas-containing reservoir, a mathematical model of the residual oil-gas saturation of the flushing zone is established, the residual oil-gas saturation of the flushing zone is calculated in combination with the neutron porosity and the density porosity after argillaceous correction, and when the neutron porosity and the density porosity exceed a specified index, the flushing zone is defined as a gas reservoir. According to the method, the residual oil and gas saturation of the flushing zone can be obtained through conventional neutron and density logging related data, the influence of geological factors on the method is small, calculation of the residual oil and gas saturation of the flushing zone is more accurate, evaluation of the gas bearing property of the reservoir is more accurate, and the application range is wider.

The invention discloses a hydrogen-containing index correction method and device and computing equipment. The method comprises the following steps: acquiring a first function relationship between a hydrogen index and a thermal neutron count ratio under a standard environmental parameter; aiming at any parameter value of any environmental parameter, a neutron logging forward modeling model is utilized to simulate and obtain thermal neutron counting ratios under different porosity values, and the environmental parameters comprise mineral types and / or fluid types; calculating a hydrogen-containing index value according to the thermal neutron counting ratio of the parameter value of the environmental parameter and the first function relationship, and generating a second function relationship between the correction value of the parameter value of the environmental parameter and the hydrogen-containing index according to the porosity value and the hydrogen-containing index value; and correcting the measured value of the hydrogen content index of the actual environmental parameter by using the second function relationship. According to the scheme, hydrogen-containing index correction can be carried out on complex environments of different mineral types and / or different fluid types, the application range of hydrogen-containing index correction is widened, and the precision of the hydrogen-containing index for representing the formation porosity is improved.

The application discloses a method for restoring original organic geochemical parameters of high-overmature hydrocarbon source rock based on a FR-IR model, S1: collecting a large amount of marine and terrestrial basin from immature to overmature I, II1 and II2 type hydrocarbon source rock organic geochemical data; S2: establishing a HI and Tamx trend chart; S3: establishing a TOC threshold value and hydrogen index assignment; S4: selecting a large number of I, II1 and II2 type hydrocarbon source rock samples; S5: performing thermal simulation experiment, TOC and pyrolysis experiment on the samples, and performing hydrocarbon source rock evaluation; S6: establishing a FR restoration model; S7: establishing an IR restoration model; S8: collecting a large amount of world typical marine and terrestrial I, II1 and II2 type high-overmature hydrocarbon source rock organic geochemical data, and respectively performing restoration by applying the FR and IR models. The application proposes a high-precision FR-IR restoration model with universality, which can accurately restore original organic matter abundance and original hydrocarbon generation potential of high-overmature hydrocarbon source rock.

The application provides a method for detecting phase content rate of multiphase flow. The method comprises: sampling the multiphase flow to be detected to obtain a multiphase flow sample, and performing three-phase separation on oil, gas and water in the multiphase flow sample; performing nuclear magnetic resonance on pure water and water and oil in the multiphase flow sample respectively to obtain corresponding first amplitude values of free decay signals, and determining hydrogen-containing indexes corresponding to the water and the oil by using the first amplitude values; applying a diffusion editing pulse sequence to the water and the oil to obtain diffusion coefficients corresponding to the water and the oil; performing pulse emission on the multiphase flow to be detected by using a variable echo interval pulse sequence to obtain echo signals, and determining the phase content rate of the multiphase flow to be detected according to the echo signals, the hydrogen-containing indexes and the diffusion coefficients. The application makes up for the deficiency that it is difficult to distinguish oil and water, realizes quantitative determination of different fluid component contents, does not need to collect relaxation information of the measured fluid, has fast measurement speed, and can realize online measurement of multiphase flow phase content rate with full range, high efficiency, environmental protection, safety and the like.

In the formula for the redox potential E based on the Nernst equation, with the temperature set at 37℃ (310K), the redox potential E of hydrogen / hydrogen ions is E = -0.061 × pH + 0.031 × pH² (V). At pH = 7.4, E = -0.451 + 0.031 × pH² (V). The hydrogen index pH² of the test subject is measured, and E is calculated using the above formula. According to the potential verification method of the present invention, by blowing air and air containing hydrogen into phosphate buffer, measuring the potential before and after blowing, performing necessary corrections, and obtaining a linear regression line, the change in potential accompanying the change in hydrogen index pH² can be confirmed. It can be seen that the calculated redox potential is approximately the same as the actual redox potential.

The embodiment of the present application discloses a shale oil interval evaluation method, device, equipment and storage medium, wherein the method comprises: obtaining free hydrocarbon data, hydrogen index data and porosity data of a target shale oil interval; determining a target enrichment coefficient corresponding to the target shale oil interval according to the free hydrocarbon data, hydrogen index data and porosity data of the target shale oil interval; comparing the target enrichment coefficient with an enrichment coefficient threshold value corresponding to the target shale oil interval, and determining a sweet spot evaluation result of the target shale oil interval according to the comparison result; wherein the enrichment coefficient threshold value is a threshold value for evaluating the enrichment coefficient of an interval in a target region to which the target shale oil interval belongs. The technical scheme of the embodiment of the present application can determine the enrichment coefficient of the target shale oil interval based on the free hydrocarbon data, hydrogen index data and porosity data, and can improve the sweet spot analysis accuracy by quantitatively evaluating the target shale oil interval, thereby providing convenience for shale oil exploration and development.

This invention discloses a method for identifying and processing reliable geochemical data of mud-contaminated rock cuttings, relating to the field of geochemical testing technology for rock cuttings samples. The method includes: F1, correction of contamination data identification; F2, determination of contamination error; and F3, for wells without pyrolysis spectra, recursively estimating the contamination amount using the increasing contamination pattern, summarizing two correction modes. The technical solution of this invention is applicable to rock cuttings samples contaminated by solid powdered additives in water-based mud. It requires samples from surrounding uncontaminated wells for comparison to determine whether the target well sample is contaminated, core / well wall core samples as standard samples, and pyrolysis spectra from some wells. By using this technology to identify and correct the contaminated sample, the TOC and S2 parameters are regressed to the core region, eliminating errors in organic matter abundance evaluation. Simultaneously, using this technology to identify and correct the contaminated sample's hydrogen index is also regressed to the core region, eliminating optimization effects in organic matter type evaluation.

The invention discloses a low-pressure equivalent measurement method and system for nuclear magnetic resonance relaxation characteristics of high-pressure natural gas, and belongs to the technical field of petroleum and natural gas development. The method comprises the following steps: calculating an equivalent measurement pressure required by ethane under an equivalent condition based on a hydrogen content index of methane under a formation temperature and formation pressure condition of a rock sample; ethane is injected, and the nuclear magnetic porosity of the rock sample is collected under the equivalent measurement pressure and the formation temperature. By means of the method, nuclear magnetic resonance parameters equivalent to deeper formation pressure can be measured in a laboratory, and therefore the exploration and development requirements of ultra-deep oil and gas wells are met.

The invention discloses a neutron gamma density improvement method based on drill collar inelastic gamma, and relates to the technical field of petroleum and natural gas development, and the method comprises the steps: s1, simulating total inelastic gamma-ray spectrum data recorded by a logging instrument under the conditions of different stratum densities and hydrogen-containing indexes; s2, extracting drill collar inelastic gamma counts mixed in the total inelastic gamma energy spectrum; s3, a stratum inelastic gamma count which is not affected by drill collar inelastic gamma information is obtained; s4, obtaining a formation density calculation method based on formation inelastic gamma counting and drill collar inelastic gamma counting information combination; and s5, setting the model stratum in the step s1 as a saturated limestone stratum to obtain neutron gamma density logging response simulation data of the saturated limestone stratum, and repeating the steps s2 to s4 to calculate the apparent density of the gas-bearing stratum. Compared with a conventional algorithm, the density sensitivity is improved, drill collar inelastic gamma counting is introduced to correct fast neutron distribution, and the influence of a gas layer on the calculated stratum apparent density result is reduced.