60 results about "Saturation ratio" patented technology

The invention provides a method for determining flow channel parameters of a fuel cell stack, which comprises the following steps of: acquiring variables such as flow field plate size dispersion difference, diffusion layer compaction non-uniformity and sealing element springback difference in a manufacturing process, and disturbance data such as load fluctuation, gas temperature and humidity, environment air pressure change and the like in an operating environment; establishing a joint uncertainty set; setting channel width, rib width, channel depth, group parameters and the like as to-be-optimized runner parameters, constructing a performance index set including pressure drop, saturation, temperature gradient, voltage fluctuation, oxygen utilization rate and the like, and setting a corresponding opportunity constraint confidence threshold; building a mapping relation among parameters, uncertainty and performance based on a water, gas, heat and electricity multi-physical coupling model, and forming a random coupling evaluation model; and solving a target parameter combination through an opportunity constraint optimization algorithm. The average performance and the robustness are considered, and the consistency, the reliability and the mass production of the fuel cell runner design can be improved.

Example methods and systems for leak detection in transformers are disclosed. One example method includes obtaining moisture data of a substance in a power transformer. A functional relationship between relative saturation of moisture of the substance and temperature of the substance is determined based on the moisture data. A gradient of the relative saturation with respect to the temperature of the substance is determined based on the functional relationship. It is determined, based on the gradient, that a leak of moisture of an environment surrounding the power transformer into the power transformer has occurred. In response to determining that the leak has occurred, a visual alert or an audio alert is generated to indicate that the leak has occurred.

The invention discloses a method, a system, equipment and a medium for detecting an oil-water two-phase relative permeability curve, and belongs to the technical field of oil-gas field development technologies. The detection method of the oil-water two-phase relative permeability curve comprises the following steps: washing oil and drying a rock core sample, vacuumizing the rock core sample, and injecting formation water into the rock core sample, so that the rock core sample reaches a saturated water state; injecting crude oil into the core sample at a preset oil reservoir temperature to enable the core sample to reach a saturated oil state; performing water-displacing oil operation on the rock core sample at a preset flow rate, and scanning the rock core sample at a plurality of scanning nodes by using a CT (Computed Tomography) scanning device; oil saturation and water saturation are calculated according to an actually measured rock core CT value, and parameter fitting is performed on the Corey model according to the oil saturation and the water saturation to obtain an oil-water two-phase relative permeability curve. The method can accurately detect the oil-water two-phase relative permeability curve of the rock core.

The application relates to the technical field of coal mine safety, and provides a coal spontaneous combustion behavior evolution method and system under multi-physical field coupling. The temperature field of coal body spontaneous combustion changes the volume by affecting the deformation amount, the porosity of the coal body is calculated through the volume, and then the thermal deformation is driven; the thermal deformation influences the water diffusion through the porosity, the residual moisture saturation of the coal body and the liquid phase saturation, and then the water migration is driven in combination with the evaporation rate and the liquid phase saturation; the water migration drives the heat transfer in combination with the evaporation rate, the effective thermal conductivity and the coal oxidation reaction rate, a cycle of "heat transfer-thermal deformation-water-heat transfer" is formed, the "heat-force-water-heat" coupling closed loop during the coal body spontaneous combustion is realized, the two-way coupling of the seepage field, the temperature field and the mechanical field is realized, and the problem that the prediction is inaccurate due to the neglect of thermodynamic deformation and dynamic changes of pores in a traditional model is effectively solved.

The application discloses a kind of considering the dynamic change of water saturation tight gas reservoir productivity calculation method.This application method is by selecting multiple core samples, combined with the geological data of research area, using the way of steady state method and seepage method, experimental measurement each core sample under different water saturation conditions Start-up pressure gradient and gas-water relative permeability, dynamic start-up pressure gradient empirical formula is established, according to the gas-water relative permeability of each core sample under different water saturation conditions, the gas-water ratio of each core sample is calculated, and based on the physical model of tight gas reservoir fracturing horizontal well and considering the mathematical model of one-way shale gas reservoir fracturing horizontal well, the productivity model of tight gas reservoir fracturing horizontal well considering gas-water two-phase is established, and the IPR curve considering the dynamic change of start-up pressure under different water saturation conditions is obtained.The application realizes the accurate calculation of the productivity of tight gas reservoir, and lays a foundation for the development of tight gas reservoir.

The invention provides a method for detecting the porosity of a cement-based material by adopting an ultrasonic sound velocity method, and belongs to the technical field of detection of the porosity of the cement-based material.The method comprises the steps that a multi-phase sound velocity prediction model is established by preparing a gradient moisture content standard test piece, and a pore water saturation correction function is established by adopting a longitudinal and transverse wave velocity ratio; the moisture content interference is eliminated by using a saturation-sound velocity coupling inversion algorithm, the accurate detection of the three-dimensional porosity distribution of the to-be-detected material is realized by combining multi-angle ultrasonic tomography and a multiphase sound velocity distribution optimization game model, the result reliability is ensured through multi-path cross validation, the rationality of the porosity result obtained by inversion is judged, and the accuracy of the three-dimensional porosity distribution of the to-be-detected material is improved. When the porosity value exceeds the normal range threshold value corresponding to the material type, a multi-path sound velocity data cross validation program is started, the porosity is recalculated after abnormal measurement values are removed, and the technical problem that the porosity detection precision of the ultrasonic method is interfered by the water-containing state is solved.

The invention discloses a multi-parameter intelligent adjustment energy efficiency management method and system for biogas purification, and belongs to the technical field of biogas purification. The method comprises the following steps: acquiring hydrogen sulfide concentration, carbon dioxide concentration and gas moisture content data, constructing an impurity parameter set based on historical sampling data, and calculating upper and lower envelope boundaries of each parameter to form an impurity parameter envelope boundary combination; calculating to obtain a comprehensive impurity fluctuation intensity index through the envelope width, and adding a fluctuation intensity label; and acquiring the accumulated regeneration times, adsorption efficiency and residual saturation of the adsorbent from a system background, calculating the health degree of the adsorbent, and distributing a health degree label. The intelligent regulation strategy table is constructed, and the corresponding regulation strategy is selected according to the real-time working condition, so that the dynamic energy efficiency management of the biogas purification process is realized, the pertinence and the stability of the regulation decision are improved, the system energy consumption is reduced while the purification effect is ensured, and the engineering application value is good.

The invention discloses a rock physical forward modeling method applicable to formation pore fluid of carbon dioxide, and relates to the technical field of petroleum and natural gas engineering. The method comprises the steps of firstly obtaining a carbon dioxide physical property constraint condition based on a state equation of carbon dioxide under a reservoir temperature and pressure condition, and then based on the constraint condition and according to logging information of a target well, core analysis and a laboratory test result, carrying out formation evaluation to calculate reservoir parameters. Then, based on reservoir parameters, the sandstone content is obtained through calculation, a rock physical volume model of a target well is constructed, and finally, based on the model, corresponding rock physical forward modeling is conducted according to different carbon dioxide saturations by means of the equivalent medium theory to generate stratum elastic attribute parameters. And the change relation between the corresponding saturation and the stratum elastic attribute parameters is quantitatively represented, so that the CO2 quantitative monitoring precision and reliability can be remarkably improved by comprehensively considering the special physical properties of CO2, the fluid replacement mechanism and the seismic wave propagation characteristics.

The invention provides an ultrasonic sound velocity detection method for the water content of concrete, and belongs to the technical field of concrete water content detection.The ultrasonic sound velocity detection method comprises the steps that a decoupling quantitative model of ultrasonic sound velocity, porosity and saturation is established, and multi-angle data acquisition is conducted through a two-way single-transmitting three-receiving method or an orthogonal opposite measurement method; rebar interference sound paths are eliminated by using a metal obstacle constrained linear interpolation tracking method, coarse-to-fine progressive sound velocity field reconstruction is realized through a layered adaptive inversion model, grid encryption and full-waveform inversion optimization are performed on a high-gradient region, and finally sound velocity distribution is converted into a moisture content distribution cloud picture. The technical problem that high-precision spatial distinguishing cannot be achieved for the internal moisture content distribution of the reinforced concrete is solved.

This invention discloses a method for determining the upper limit of water saturation in tight gas reservoirs using two-phase permeability analysis, comprising: 1. Selecting several rock samples for gas-water two-phase permeability analysis, and establishing a gas-water phase permeability curve based on the relative permeability of the water phase, the relative permeability of the gas phase, and the water saturation value of each rock sample; 2. Based on the gas-water phase permeability curve, first reading the water saturation value of each rock sample when the relative permeability of the water phase is a set value A, then reading the relative permeability of the gas phase corresponding to the same water saturation value of each rock sample, and determining the upper limit of water saturation for each rock sample accordingly; 3. Calculating the average value of the upper limit of water saturation for each rock sample, and the obtained average value is the upper limit of water saturation for the tight gas reservoir. This invention can accurately determine the upper limit of water saturation in tight gas reservoirs using relatively simple means, simplifying the determination process and improving accuracy compared to existing technologies, providing an accurate basis for the rational exploitation of tight gas reservoirs.

The invention discloses a method for predicting unfrozen water content in a soil thawing process based on a pre-thawing theory. The method comprises the following specific steps: step 1, deducing an association relationship between an ice-water two-phase chemical potential difference and a temperature difference; 2, establishing an interface energy equation, and deducing a quantitative expression of the thickness and temperature difference of the pre-melting layer; 3, calculating the residual moisture content; 4, a Van Genuchten moisture feature model is introduced to describe the relation between the residual saturation and the temperature; the model prediction precision is excellent, the physical significance is clear, dynamic changes of unfrozen water of different soil textures can be accurately described, and theoretical support and a practical method are provided for cold region infrastructure anti-freezing design and soil moisture prediction.

The invention discloses a condensate gas reservoir horizontal well reverse condensation multiphase flow pseudo-pressure determination method. The method comprises the following steps: determining relative permeability of a gas phase and an oil phase under different pressures based on well flow component data of a condensate gas reservoir horizontal well; determining the gas phase relative permeability under irreducible water saturation based on the relative permeability curve of the condensate gas reservoir horizontal well; correcting the gas phase relative permeability under different pressures and the gas phase relative permeability under irreducible water saturation based on a capillary number effect and a high-speed non-Darcy effect generated by the seepage velocity of condensate gas in the condensate gas well; and based on the oil phase relative permeability under the different pressures, the corrected gas phase relative permeability under the different pressures and the corrected gas phase relative permeability under the irreducible water saturation, utilizing a three-region pseudo-pressure equation to determine the pseudo-pressure of the three regions of the condensate gas well. The pseudo-pressure of the condensate gas reservoir can be calculated more accurately, and a necessary basis is provided for subsequent productivity evaluation and reasonable and efficient development of the condensate gas reservoir.

The application provides a kind of determination method of fuel cell stack flow channel parameter, method includes the following steps: collecting the dimensional dispersion of flow field plate in manufacturing process, diffusion layer compaction non-uniformity, sealing springback difference and other variables, and disturbance data such as load fluctuation, gas temperature and humidity, environmental pressure change in operating environment, establish joint uncertainty set;Set channel width, rib width, channel depth, group parameters as to be optimized flow channel parameters, construct performance index set including pressure drop, saturation, temperature gradient, voltage fluctuation, oxygen utilization rate, and set corresponding opportunity constraint confidence threshold;Based on water, gas, heat, electric multi-physical coupling model, the mapping relationship between parameters, uncertainty and performance is constructed, and a random coupling evaluation model is formed;Solve target parameter combination by opportunity constraint optimization algorithm.Considering average performance and robustness, the consistency, reliability and manufacturability of fuel cell flow channel design can be improved.

The application belongs to the field of rock physics and geophysical exploration, and relates to a simulation method for wettability affecting dispersion and attenuation of partially saturated sandstone, which comprises the following steps: S1. establishing a relationship between capillary pressure and water saturation for wettability correction; S2. calculating equivalent pore throat radius and effective permeability according to the relationship between capillary pressure and water saturation; S3. calculating characteristic frequency and complex bulk modulus under different wettability conditions based on a partially saturated patchy medium model; S4. simulating and comparing the characteristics of longitudinal wave velocity and attenuation under different wettability and water saturation conditions, analyzing the modulation law of frequency-dependent acoustic response caused by wettability change, and realizing quantitative characterization of the wettability effect. The step-by-step modeling method proposed in the application, combined with the wettability correction parameter represented by the contact angle, can systematically calculate the continuous coupling process from capillary pressure to equivalent pore throat structure and equivalent permeability to acoustic response, and realize quantitative analysis of the wettability change on the dispersion and attenuation law.

The application provides a volume fracturing post-pressure soaking time optimization method, which is based on well logging interpretation to obtain the temperature, saturated original water saturation, formation stress and pore pressure of a target layer; a target layer sample is selected to measure the core porosity and geometric size, and the core water saturation is equal to the formation water saturation under the formation temperature condition; the spontaneous imbibition curve is measured under the formation temperature and confining pressure condition, the spontaneous imbibition curve is plotted on the double logarithmic coordinate axis, the inflection point is found, and the inflection point time is recorded; the fitting equation is obtained by repeating the experiment; under the actual well condition, the average fracture spacing of micro-fracture and the actual formation saturation are estimated, the parameters are brought into the fitting equation, and the optimized soaking time interval can be obtained, so that the volume fracturing post-pressure soaking time is optimized. The method is simple, easy to operate, and good in reliability, can realize the estimation of the optimal soaking time on the site based on the indoor experiment, and achieves the purpose of soaking time optimization.

The present application relates to the technical field of composite material nondestructive testing and structure health monitoring, in particular to a new energy composite material micro-crack testing method based on ultrasonic echo; comprising: obtaining the time sequence ultrasonic echo signal of the target composite material in a continuous time period, and synchronously obtaining the soil volume water content and soil temperature; extracting the echo attenuation coefficient under different soil volume water contents, and analyzing the water saturation degree of micro-cracks; combining the soil humidity change curve and the water saturation degree change curve to calculate the capillary water absorption response coefficient; inputting the water machine coupling degradation prediction model to calculate the material degradation rate and the residual strength reduction coefficient; combining the future meteorological prediction data to extrapolate the water-sensitive micro-crack risk index, and obtaining the dynamic warning of the remaining safe life; the present application realizes the improvement from single static detection to the identification of the internal medium state of cracks.

The invention relates to the technical field of reservoir numerical simulation application, in particular to a post-water-drive flow field evaluation method and device for water-drive development of a low-permeability volatile reservoir. The method comprises the following steps: determining a moisture flow field in a grid according to fluid parameters and grid thickness in the grid corresponding to an oil reservoir geologic model of a target low-permeability volatile oil reservoir; determining a residual reserve abundance field in the grid according to the fluid parameters and the saturation in the grid; determining a displacement intensity field in the grid according to the fluid parameters and the water flows in different directions in the grid; and according to the water flow field, the residual reserve abundance field and the displacement intensity field, evaluating the post-water-flooding flow field of the low-permeability volatile oil reservoir. The invention provides a whole set of scientific, reasonable and widely applicable grading evaluation method for characterizing and evaluating the seepage flow field of the water development low-permeability volatile reservoir.

The invention provides a method for determining the water saturation of a fracture-cavity medium rock core. The method comprises the following steps: acquiring output data of the rock core at different inclination angles and different oil-water injection ratios; calculating the output data to obtain initial core water saturation; drawing a scatter diagram of the water saturation along with the water content by taking the water content of the outlet end of the rock core as a horizontal coordinate and the initial water saturation of the rock core as a vertical coordinate; fitting data in the scatter diagram by using a nonlinear least square method based on an oil-water diversion model to obtain a relationship between different inclination angles and the fracture-cavity rock core moisture content; and calculating based on the relationship of the water contents of the fracture-cavity rock cores with different inclination angles to obtain the water saturation of the standard fracture-cavity rock core under different inclination angles. The method disclosed by the invention quantitatively reveals the rule of influence of the fracture-cavity inclination angle on the water saturation in the rock core, and overcomes the limitation that a traditional sandstone rock core testing method is not suitable for fracture-cavity rock core testing.

A method for determining an efficacy statement in a decontamination process (1) is proposed, wherein in the decontamination process (1) a decontamination agent (2) acts on at least one object (4) in a controlled environment (3), wherein a concentration measurement variable (7) correlating with a concentration of the decontamination agent (2) in the controlled environment (3), a humidity measurement variable (8) correlating with a moisture content in the controlled environment, a temperature measurement variable (9) correlating with a temperature in the controlled environment, and a saturation measurement variable correlating with a saturation are acquired so that that the efficacy statement is determined, preferably in an automated manner, using the acquired measurement variables (7, 8, 9).

The present application belongs to the technical field of permeability measurement, and relates to a system and method for measuring relative permeability under the condition of coexistence of CO2 and water in three phases. The method comprises: obtaining relative permeability data of gaseous CO2 by using a gaseous CO2-water relative permeability experiment; obtaining relative permeability data of liquid CO2 by using a liquid CO2-water relative permeability experiment; normalizing the three-phase saturations of the water phase, gaseous CO2 and liquid CO2 according to the relative permeability data of gaseous CO2 and the relative permeability data of liquid CO2, combining the STONE model, and simultaneously calculating the relative permeability of the water phase to obtain the three-phase relative permeability of the CO2 liquid phase-CO2 gaseous phase-water phase. The present application can accurately calculate the three-phase relative permeability of the CO2 liquid phase-CO2 gaseous phase-water phase.

The application discloses a kind of geotechnical survey system and porosity measurement method and saturation measurement method, and geotechnical survey system includes: at least one heating structure, first position is installed at inside of geotechnical sample;First temperature measuring structure, first position is installed at inside of the geotechnical sample or second position is installed at inside of the geotechnical sample;Data processing device, with the heating structure and the first temperature measuring structure electric connection can be according to the heating time and heating power of the heating structure and the temperature change analysis and processing of the installation place of the first temperature measuring structure obtain the parameter to be measured of the geotechnical sample.The application is analyzed and processed according to the thermal response characteristics of geotechnical sample, and the porosity and saturation of geotechnical sample can be obtained, and formation can be directly measured in field or downhole, without destructive sampling or coring, so that artificial disturbance and error possibly introduced in sample preparation process can be avoided.

The embodiment of the present application provides a shale oil reservoir wettability judgment method and device, and belongs to the technical field of oil and gas development. The shale oil reservoir wettability judgment method comprises the following steps: obtaining the intake rate and / or intake fluid saturation of a rock sample when the rock sample spontaneously absorbs fluid; judging the average wettability of the shale oil reservoir according to the intake rate and / or intake fluid saturation; judging the hydrophilic and oleophilic ability of the shale oil reservoir under the same pore radius according to the signal intensity increment S1 of the rock sample when the water-saturated state is compared with the dry state and the signal intensity increment S2 of the rock sample when the oil-saturated state is compared with the dry state; and judging the wettability of the shale oil reservoir according to the average wettability of the shale oil reservoir and the hydrophilic and oleophilic ability of the shale oil reservoir under different pore radii. The embodiment of the present application comprehensively judges the wettability of the shale oil reservoir by combining the average wettability and the hydrophilic and oleophilic ability of the shale oil reservoir under different pore radii, can reflect the wetting characteristics of oil and water in the shale oil reservoir from multiple dimensions, and makes the evaluation more comprehensive.

This invention discloses a scale-adaptive method for cloud droplet condensation processes in a microphysical parameterization scheme, relating to the field of meteorological technology. The method includes: S1, simulating the cloud droplet condensation conversion rate and the pre-condensation temperature and water vapor at each scale of 0.5 km, 1 km, and 3 km; S2, fitting a normal distribution of supersaturation at the 0.5 km scale at the 3 km scale; S3, dividing the normal distribution into M intervals; S4, analyzing the weighted cloud droplet condensation amount in each interval; S5, summing the weighted cloud droplet condensation amounts in each interval to obtain the total cloud droplet condensation amount corresponding to the supersaturation at the 3 km scale; S6, repeating S2-S5 to analyze the total cloud droplet condensation amount corresponding to the supersaturation at the 1 km scale; S7, using extrapolation to construct a scale-adaptive cloud droplet condensation parameterization scheme, achieving adaptation of the cloud droplet condensation process. This method effectively reduces the deviation of the cloud droplet condensation process at different spatial scales, meets the requirements of variable grid models, and improves the accuracy of simulations and short-term severe weather forecasts.

This invention provides a method for visually evaluating the gas-water flow patterns within fractured horizontal wells. The method includes: preparing an experimental physical model; weighing and recording the first weight of the physical model under dry conditions; the physical model is used to simulate fractured horizontal wells; pumping a colored displacement solution into the physical model to completely displace the air within the model; weighing and recording the second weight of the physical model at this point; injecting gas and water into the physical model under different experimental conditions; recording the gas-water distribution and flow state within the physical model; and calculating the critical water saturation for gas-water flow. This invention can simulate the flow and distribution of the gas and water phases within fractures under different conditions, such as fracture width, proppant size, proppant wetting properties, gas-water flow velocity, and gas-water ratio.

Example methods and systems for leak detection in transformers are disclosed. One example method includes obtaining moisture data of a substance in a power transformer. A functional relationship between relative saturation of moisture of the substance and temperature of the substance is determined based on the moisture data. A gradient of the relative saturation with respect to the temperature of the substance is determined based on the functional relationship. It is determined, based on the gradient, that a leak of moisture of an environment surrounding the power transformer into the power transformer has occurred. In response to determining that the leak has occurred, a visual alert or an audio alert is generated to indicate that the leak has occurred.

The application discloses a kind of measurement methods of soil water characteristic curve of undisturbed soil under different humidity paths.The method includes taking undisturbed soil sample in cohesive soil body, and the undisturbed soil sample is divided into wetting soil sample group and humidifying soil sample group, vacuum saturation, drying treatment is carried out to wetting soil sample group and humidifying soil sample group, and the undisturbed soil sample after treatment is obtained;Then tension meter is stretched into the undisturbed soil sample to obtain the matric suction of undisturbed soil sample;Saturation of the excavated soil is measured;The matric suction of undisturbed soil sample under different humidity paths is drawn by using the saturation of soil in wetting soil sample group and humidifying soil sample group and the matric suction of undisturbed soil sample.The application uses micro tension meter to measure the change of matric suction in the process of humidifying and wetting fine-grained soil, can measure the change trend of matric suction of undisturbed soil body with water content without destroying the structure of fine-grained soil, and more truly reflects the property difference of undisturbed soil sample when it is subjected to different change processes.

The application discloses a kind of porous medium gas diffusion coefficient experimental device and method of stepless humidity, including external constant temperature and humidity box, gas diffusion tester, standard salt solution, gas concentration sensor etc..The test device can determine the influence of any saturation soil as horizontal barrier layer on gas diffusion under specific temperature and humidity.At the same time, the application also provides a kind of test method of model device for testing gas diffusion coefficient of horizontal barrier layer, by measuring test environment temperature, humidity, oxygen concentration, soil moisture content and soil compaction degree, the saturation of soil, gas diffusion coefficient, air humidity and temperature and the influence of different barrier materials, compaction degree on the barrier performance of horizontal barrier layer are obtained.

The present application belongs to the technical field of special soil quantitative analysis, and proposes a water-heat-force quantitative analysis method for regulating and controlling soil body freeze-thaw cycle process by wicking geotextile, and the specific steps are as follows: triaxial shear test of soil under freeze-thaw cycle conditions is carried out to obtain soil body cohesion force degradation equation under water-heat condition; the control equations of temperature field and moisture field are converted into theoretical equations with saturation S as independent variable to realize two field coupling; the coupling relationship between wicking geotextile and moisture field is established; and the calculation method of stress field, temperature field, moisture field and wicking geotextile is written into numerical simulation software for full coupling. The present application is established by indoor test combined with calculation theory derivation, realizes effective simulation of the regulation and control effect of wicking geotextile on roadbed water content, determines the best laying position and laying method of wicking geotextile in the process of regulating and controlling roadbed drainage, improves the efficiency of wicking geotextile in regulating and controlling roadbed water content, and reduces the engineering cost.

This application provides a device and method for measuring the resistivity and acoustic waves of a core sample displaced by carbon dioxide. The device includes a core holder, a displacement device, a measuring device, and a host computer. The displacement device is used to displace the core sample using formation water and supercritical carbon dioxide according to the control signal from the host computer. The measuring device is used to measure the instantaneous water displacement, resistivity, and acoustic wave signals of the core sample during the displacement process. The host computer is used to determine the internal state of the core sample. When the internal state of the core sample is saturated and stable, it sends a control signal to the displacement device and determines whether the acquired instantaneous water displacement meets the preset carbon dioxide saturation condition. When it is determined that the instantaneous water displacement meets the carbon dioxide saturation condition, the corresponding resistivity and acoustic wave signals are obtained. This application realizes the accurate measurement of parameters such as rock displacement experiments, resistivity, and acoustic waves, providing support for the quantitative calculation of the supercritical carbon dioxide saturation of actual formations using acoustic wave and resistivity logging.

The application provides a function description method of rock resistivity, which comprises the following steps: selecting at least two rock samples of the same type of rock, performing a saturated water experiment and a centrifugal experiment on the rock samples, and measuring the pore water resistivity of the rock samples, the rock resistivity corresponding to the saturated water saturation, and the rock resistivity under different partial water saturations; according to the rock porosity, the pore water resistivity, the rock resistivity corresponding to the saturated water saturation, and the rock resistivity under different water saturations, the first function coefficient and the second function coefficient of a saturated water rock resistivity description function equation are obtained, the third function coefficient of a partial saturated water rock resistivity and bound water saturation relationship equation corresponding to different effective water saturations, and the fourth function coefficient and the fifth function coefficient of a partial saturated water rock resistivity description function are obtained, and finally, the function description of the rock resistivity is obtained, and the accuracy of the rock resistivity description is improved.