8 results about "Saturation index" patented technology

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.

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 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.

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.