19 results about "Saturation index" patented technology

The invention relates to a lacustrine facies shale conductive model considering organic matter influence and a saturability evaluation method, and belongs to the technical field of unconventional oil and gas reservoir oiliness evaluation, and the method comprises the following steps: 1) representing fluid information in a shale sample based on a pressure-maintaining closed sample and a two-dimensional nuclear magnetic resonance technology; 2) according to the organic carbon content and the clay content of the shale, dividing the lithology type of the lacustrine facies shale, and analyzing the relation between different lithology resistivity values and the porosity of free water and bound water; 3) selecting a siltstone interlayer sample, and inversely calculating a cementation index and a saturation index of the inorganic pore conductive network; 4) establishing a lacustrine facies shale parallel conductive model, and calibrating rock-electricity parameters according to lithology; 5, a lithology discrimination chart, a TOC prediction model, a bound water content prediction model and an effective porosity calculation model are established, and the oil saturation is explained according to different lithologies in combination with the lacustrine facies shale parallel conduction model.According to the method, accurate shale reservoir fluid information is provided, and a brand new thought is provided for rock electrical parameter calibration.

The invention discloses a method for evaluating the mineralization potential of porphyry copper-(gold-molybdenum) ore. The evaluation method comprises the following steps: determining candidate rock masses with relatively high mineralization potential according to an oxygen fugacity value of magma zircon and / or a magma water content value of hornblende in a rock sample in an evaluation area; the aluminum saturation index ASI of the candidate rock mass is measured and calculated, the distribution coefficient and the distribution coefficient ratio of Cu, Au and Mo between fluid and melt are determined according to the ASI, simulation calculation is conducted through a Rayleigh fractionation model according to the distribution coefficient and / or the distribution coefficient ratio, and the content ratio of Au to Cu to Mo to Cu of the candidate ore body is obtained. According to the method, the mineralization potential of the porphyry copper ore and the enrichment degree and grade of Cu, Au and Mo of potential ore bodies can be rapidly and accurately evaluated.

The invention discloses a well logging water saturation calculation method and device, equipment and a medium, and relates to the technical field of oil and gas field exploration and development geological research, and the method comprises the steps: preprocessing a well logging curve of a crack and pore composite compact sandstone reservoir, and calculating the parameter information of a crack according to the processed curve; correcting the deep lateral resistivity value in the processed curve to obtain a corrected resistivity value; calculating a target exchange coefficient and a resistance increase rate of the rock core; determining a logging cementation index according to the parameter information of the fracture and the target exchange coefficient, dividing reservoir types, and fitting the core water saturation and the resistance increase rate of different reservoir types to obtain fitting results; obtaining a logging saturation index and a logging lithologic coefficient according to an Archie formula and a fitting result, and determining the logging water saturation based on the corrected resistivity value, the logging cementation index, the logging saturation index and the logging lithologic coefficient. And the logging water saturation can be accurately calculated.

A process cooling water (PCW) system and method for an iron or steelmaking application, the PCW system and method including: sampling a plurality of characteristics of PCW using a plurality of sensors; calculating one or more of Langelier Saturation Index (LSI) and Ryznar Stability Index (RSI) based on the plurality of characteristics using a LSI / RSI measurement unit coupled to the plurality of sensors; and injecting one or more anti-scalant chemicals into the PCW responsive to the calculated one or more of the LSI and the RSI in real time using an anti-scalant injection system to thereby control scale formation in the PCW.

The present invention discloses a method for optimizing an anti-saturation trajectory for Mars entry, which belongs to the field of aircraft guidance and control. The implementation method of the present invention is as follows: the roll angle obtained by tracking the drag acceleration curve is defined as the calculated roll angle; a three-level orthogonal table is used to select a combination of aerodynamic parameter disturbances, and then a sensitivity formula for the calculated roll angle to the disturbance combination is constructed, and the influence of aerodynamic parameter disturbances on the calculated roll angle is quantified by the sensitivity formula; in order to meet the terminal constraint requirements and anti-saturation capability requirements of the lander under aerodynamic disturbances, a terminal constraint optimization index and an anti-saturation optimization index based on the sensitivity formula are designed respectively, and the two optimization indicators of the altitude and range constraint index and the anti-saturation index are linearly weighted to obtain a comprehensive entry trajectory optimization index that improves the anti-saturation capability. The above comprehensive index is optimized using an optimization method to obtain an optimized roll angle-energy profile, and the anti-saturation entry trajectory is obtained after tracking the profile.

The present invention relates to a lacustrine shale conductive model and saturation evaluation method considering the influence of organic matter, belonging to the technical field of oil content evaluation of unconventional oil and gas reservoirs, including: 1) characterizing fluid information in shale samples based on pressure-maintained sealed samples and two-dimensional nuclear magnetic resonance technology; 2) classifying lacustrine shale lithology types according to shale organic carbon content and clay content, and analyzing the relationship between resistivity values ​​of different lithologies and free water and bound water porosity; 3) selecting siltstone interlayer samples, and inversely calculating the cementation index and saturation index of the inorganic pore conductive network; 4) establishing a lacustrine shale parallel conductive model, and calibrating rock electrical parameters by lithology; 5) establishing a lithology and lithology discrimination chart, a TOC prediction model, a bound water content prediction model and an effective porosity calculation model, and combining the lacustrine shale parallel conductive model to interpret oil saturation by different lithologies. The present invention provides accurate shale reservoir fluid information and provides a new idea for rock electrical parameter calibration.

The present application discloses a method, device, equipment, and medium for calculating well logging water saturation, relating to the technical field of geological research for oil and gas field exploration and development. The method comprises the following steps: pre-processing a well logging curve of a tight sandstone reservoir with a composite structure of fractures and pores, calculating fracture parameter information based on the processed curve; correcting the deep lateral resistivity value in the processed curve to obtain a corrected resistivity value; calculating a target exchange coefficient and a core resistivity increase rate; determining a well logging cementation index based on the fracture parameter information and the target exchange coefficient, classifying reservoir types, fitting the core water saturation and resistivity increase rate of different reservoir types, and obtaining fitting results; obtaining a well logging saturation index and a well logging lithology coefficient based on the Archie formula and the fitting results, and determining the well logging water saturation based on the corrected resistivity value, the well logging cementation index, the well logging saturation index, and the well logging lithology coefficient. Thus, the well logging water saturation can be accurately calculated.

Systems and methods for applying a chemical treatment solution to a process stream in an industrial processing system while the system is online. The method includes measuring a real-time pH of the process stream, determining a dosage of the chemical treatment solution based on a relationship between the dosage and a scale saturation parameter that is calculated based on the real-time pH of the process stream, and controlling application of the chemical treatment solution to the process stream based on the determined dosage.

The present invention provides a method for continuously characterizing the oil content distribution of mixed shale oil, and belongs to the technical field of quantitative characterization of oil content of unconventional oil and gas. Conduct core porosity and oil content tests on mixed rock samples of different lithologies; select logging curves, and construct porosity interpretation models and clay interpretation models for mixed shale reservoirs according to different lithologies; construct porosity and clay interpretation models for mixed shale reservoirs based on the constructed different lithologies, determine rock electrical parameters for different lithologies, establish rock electrical parameter interpretation models, and establish saturation index interpretation models for different lithologies; invert formation water resistivity values ​​based on measured oil saturation data and rock electrical parameter interpretation models, and establish resistivity value interpretation models for different strata; determine oil content based on the established resistivity interpretation model, and realize continuous characterization of oil content based on conventional logging curves. The present invention realizes continuous characterization of shale oil content based on conventional logging curves, filling the gap in this field.

The invention discloses a residential district spring water direct drinking pipe network hydraulic model construction and optimization design method. According to the method, a pipeline roughness coefficient slow-varying trend component is predicted based on a Langelier saturation index and a scaling rate physical equation, and a fast-varying disturbance component is extracted through variational mode decomposition, so that parameter multi-scale decomposition is realized; a physical information neural network is used as a hydraulic positive problem agent solver, whole-network hydraulic state parallel reasoning is completed within 50 milliseconds, and meanwhile an accurate analysis Jacobian matrix is obtained at zero extra cost through automatic differential; bayesian statistical fusion of multi-sensor observation and parameter estimation is realized through sparse ensemble Kalman filtering based on a pipe network observability coefficient, and pipeline roughness coefficient posterior probability distribution is output. According to the invention, parameter real-time calibration completely synchronous with the acquisition period of the sensor is realized, and the consumption of computing resources is reduced by more than 80%; water quality-hydraulic power double safety constraints are embedded; and whole-network high-precision state estimation under 20% of sensor coverage rate is supported.

The invention discloses a tight reservoir saturation index determination method and device, electronic equipment and a storage medium. The method comprises the following steps: determining target rock core saturated water state resistivity, target rock core resistivity and target rock core effective conductive water saturation; determining a saturation index of the target rock core according to the target rock core saturated water state resistivity, the target rock core resistivity and the target effective conductive water saturation; and determining the saturation index of the target tight reservoir according to the saturation index of the target core. According to the method, the water content in pores which do not participate in electric conduction in the target rock core is eliminated, and errors caused by water in the pores which do not participate in electric conduction are eliminated, so that the saturation index n capable of reflecting the real state of the target rock core is obtained.

The invention discloses a self-adaptive strategy generation method and system for enrollment propaganda, and the method comprises the steps: obtaining the multi-modal behavior data of a target examinee at the current moment, and constructing an examinee cognitive state vector; according to the cognitive state vector of the examinee, calculating a cognitive saturation index and an effectiveness attenuation factor; then constructing an instantaneous enrollment utility function; representing the enrollment propaganda strategy as a strategy vector containing propaganda frequency, a propaganda medium form and a propaganda content theme, and establishing a strategy evolution differential equation for the strategy vector based on the instantaneous enrollment utility function; and performing cross-channel collaborative optimization on the evolved strategy vector to minimize a collaborative excitation function formed by content similarity and time overlapping degree between channels, and generating a final propaganda strategy. By constructing a continuous adaptive strategy generation mechanism fusing cognitive saturation, a competitive attenuation effect and cross-channel collaborative constraint, the accuracy, collaboration and conversion efficiency of college enrollment propaganda are remarkably improved.

The invention discloses a method, a medium and equipment for evaluating the gas-bearing property of a complex-configuration compact sandstone gas reservoir, and relates to the technical field of geophysical logging evaluation. The method mainly comprises the following steps: obtaining a porosity index factor and a saturation index factor according to the porosity of a compact sandstone sample, the resistivity of an anhydrous sample and the resistivity of a saturated sample; obtaining continuous gas saturation according to the resistivity curve, the porosity index factor and the saturation index factor; according to the to-be-evaluated horizon depth and the continuous gas saturation, obtaining an evaluation index of the logging gas-bearing property; and performing normal distribution fitting by utilizing frequency analysis according to the evaluation index of the gas-bearing property of the well logging to obtain a gas-bearing property evaluation result of the sandstone gas reservoir. By implementing the method, the medium and the equipment for evaluating the gas-bearing property of the compact sandstone gas reservoir with the complex configuration, the diversity of gas-bearing property distribution in the complex reservoir can be better reflected, and the development efficiency and accuracy of the compact gas reservoir are improved.

The invention relates to the technical field of geophysical exploration, in particular to a saturation calculation method, device and equipment of a complex reservoir and a storage medium, and the saturation calculation method of the complex reservoir comprises the steps that the movable fluid porosity of the complex reservoir is determined based on nuclear magnetic well logging and conventional well logging; acquiring water resistivity in an oil layer of the complex reservoir, and acquiring formation resistivity and a first lithologic coefficient of the complex reservoir; determining a cementation index, a saturation index and a second lithologic coefficient of the complex reservoir based on the regression model and the movable fluid porosity; and determining the saturation of the complex reservoir based on the movable fluid porosity, the water resistivity, the formation resistivity, the first lithologic coefficient, the cementation index, the saturation index and the second lithologic coefficient. According to the saturation calculation method of the complex reservoir, the error between the porosity obtained through conventional well logging calculation and the effective movable fluid porosity and the error of the formation water resistivity are avoided, and the accuracy of saturation calculation of the complex reservoir is comprehensively improved.

Systems and methods for applying a chemical treatment solution to a process stream in an industrial processing system while the system is online. The method includes measuring a real-time pH of the process stream, determining a dosage of the chemical treatment solution based on a relationship between the dosage and a scale saturation parameter that is calculated based on the real-time pH of the process stream, and controlling application of the chemical treatment solution to the process stream based on the determined dosage.

The application provides an intelligent water quality prediction and regulation method in a power plant descaling process, and relates to the technical field of water quality prediction, and specifically comprises the following steps: collecting data recorded during chemical cleaning and descaling of a boiler of a power plant and performing data preprocessing to construct a power plant descaling water quality data set; introducing a local fluctuation suppression weight, a water temperature deviation adjustment weight, a reagent mutation suppression factor and a time decay weight to generate an enhanced delay vector; constructing a global state vector through a covariant weight and a direction perception expression; combining the global state vector, a reagent change amount and a temperature deviation to form a prediction input, adopting a heteroscedastic robust task loss based on a Huber loss and an uncertainty factor for optimization, and finally realizing multi-step prediction of a pH value, a Langelier saturation index, a calcium ion concentration, a silicate radical concentration, a conductivity and a turbidity in the next 15 minutes.

The present invention relates to a soil landslide matrix suction test method and system based on soil conductivity performance, and the method comprises the following steps: 1) establishing a calculation formula for a method for measuring matrix suction of unsaturated residual soil based on soil conductivity performance; 2) obtaining measured data of unsaturated soil conductivity-water content curve measured by an indoor soil slope rainfall experiment; 3) obtaining measured data of unsaturated soil water content-matrix suction curve measured by an indoor soil slope rainfall experiment; 4) substituting the measured unsaturated soil conductivity data and unsaturated soil matrix suction data into the calculation formula for fitting, and obtaining a saturation index and fitting parameters; 5) substituting the obtained saturation index and fitting parameters into the calculation formula, and obtaining a conductivity-matrix suction model of the soil; for unsaturated soil, substituting its conductivity into the conductivity-matrix suction model, that is, obtaining the soil matrix suction. The method and system are conducive to conveniently and effectively measuring soil matrix suction.

This application relates to a method for determining the dynamic saturation index of a water-flooded formation, belonging to the field of oilfield development technology. The method includes: preparing experimental rock samples and obtaining pre-prepared experimental data; conducting oil-flooding and water-flooding experiments on the rock samples to obtain various experimental data; and calculating different water saturation levels (S) based on the various experimental data using a mixed formation water theoretical model. w The corresponding rock resistivity R tsim The mixed formation water theoretical model was then corrected; based on the corrected mixed formation water theoretical model, formation factor formula, resistivity increase formula, and various experimental data, the water saturation S at the measurement points in the waterflooding experiment was calculated. w The corresponding increase in rock resistivity I; based on relative permeability experimental data and flow fraction equations, flooding levels are classified, and saturation standards for different flooding levels are established; based on the increase in rock resistivity I and water saturation S w The saturation index n corresponding to different flood levels is calculated to obtain the dynamic saturation index that changes with the flood level.

The invention discloses a method for determining a cementation index and a saturation index of a carbonate reservoir, and relates to the technical field of well logging data computation.The method comprises the steps that whether reference data exist in the carbonate reservoir to be judged or not is determined, and according to the determined result, the cementation index and the saturation index of the carbonate reservoir are determined; selecting a cementation index calculation scheme corresponding to the determination result to estimate the cementation index to obtain a cementation index estimation result; or determining the target porosity of the carbonate reservoir to be determined, and determining a target cementation index corresponding to the target porosity according to the corresponding relationship between the porosity and the cementation index; and according to the determination result, selecting a saturation index calculation scheme corresponding to the determination result to estimate the saturation index so as to obtain a saturation index estimation result. According to the method, the problem of inaccurate calculation of the oil and gas saturation in carbonate reservoir oil and gas reservoir evaluation is solved, and high-precision calculation parameters are provided for carbonate reservoir evaluation and reserve calculation.