39 results about "Weathering crust" patented technology

The invention relates to the technical field of geological analysis, in particular to a weathering crust reservoir fracture distribution intelligent identification system which comprises a fracture trend path construction module, a shielding extension fracture interpolation module, a cross-layer fracture directional connection module, a structural fracture space collection module and a fracture trend joint density analysis module. According to the method, directional connection of cross-layer cracks is achieved through joint judgment of three-dimensional space coordinates of the crack end point, the direction vector included angle and the ground plane normal included angle, the precision and reliability of a crack through structure are effectively improved, space distribution clustering of the cracks is achieved through statistics of the number of times of intersection of the structural unit cracks, concentration degree calculation and comparison of the concentration reference value, and the reliability of the crack through structure is improved. And combined with fracture path length, azimuth angle data and fracture quantity density statistics, combined density value calculation and integration of fracture trend and length weighting are constructed, so that reservoir fracture structure prediction precision and spatial positioning definiteness are greatly improved.

The invention discloses a method for dividing a weathering crust structure, which comprises the following steps: collecting data, carrying out regional stratigraphic development characteristic analysis, and selecting a standard well in a research region; selecting a sampling sand body in the target interval according to the logging information of the standard well, and calculating the average acoustic velocity of the sampling sand body; analyzing the average sound wave velocity of the sampled sand bodies of the standard well, and determining the average sound wave velocity of the unweathered sandstone of each group of sand bodies in the target interval of the research area as the sound wave velocity value of the unweathered sandstone; a typical well is selected, the stratum development condition of the typical well is analyzed, and the numerical value of the thick-layer sand body sound wave velocity is determined; calculating the wave velocity ratio of the thick sand body of the typical well in the target interval based on the value of the sound wave velocity of the thick sand body of the typical well and the sound wave velocity value of the unweathered sandstone; performing rock core sampling on the typical well, determining the weathering degree of the rock through experimental analysis, and establishing a standard for dividing the weathering degree and the weathering structure in cooperation with a wave velocity ratio. The method is rapid, accurate and high in operability.

The invention discloses a single-layer neural network model-based inversion method for the mass fraction of low-content rare earth secondary minerals in mother rock of a weathering crust type rare earth ore deposit. The method comprises the following steps of: acquiring content data of rare earth elements in total rock; analyzing rare earth partition characteristics of minerals in the rock sample; constructing a single-layer neural network structure to perform inversion solution on the mineral mass fractions, setting each mineral mass fraction as a to-be-optimized weight, taking each mineral rare earth element content matrix as input, and taking the total rare earth element content of the mother rock as output; setting a main loss function and an auxiliary loss function of the neural network; iterative training is carried out, and mass fraction parameters of all minerals are optimized through error back propagation; after training convergence, model optimization parameters are the mass percentage content of each mineral. The method does not depend on a traditional image recognition method, rare earth secondary minerals with low content, small particle size and complex symbiosis can be accurately recognized, and the quantitative recognition capacity and geological interpretation performance are improved.

The present application relates to a method for dividing weathering crust structure by using well logging curve and petrology characteristics, comprising: identifying and obtaining the distribution range of weathering crust in width through seismic synthetic record; selecting multiple detection wells, and obtaining the well logging data of the multiple detection wells in vertical direction respectively; identifying and obtaining the porosity characteristics of the rock stratum of each detection well; identifying the mudstone layer and sandstone layer in the target layer section which are not affected by weathering as the reference for identifying the different structure layers of weathering crust, and determining the distribution range of weathering crust in vertical direction in each detection well; establishing the weathering crust mode in the distribution range of weathering crust in vertical direction in each detection well, and dividing the distribution range of weathering crust structure in the detection well according to the weathering crust mode; and obtaining the structure characteristics of the whole weathering crust. The method is fast, accurate and operable.

The application discloses a kind of paragenetic metamorphic rock weathering crust weathering alteration index calculation method, comprising: the mass percentage of element of mud logging cuttings is determined;The mass percentage of element is normalized;The mass percentage of element after normalization is converted into oxide molar ratio;According to the change trend of element oxide molar ratio, the relative loss and relative enrichment trend of various elements in paragenetic metamorphic rock weathering crust is judged;According to the trend of element relative loss or enrichment, the easily soluble element and the element easy to remain are determined, and the new paragenetic metamorphic rock weathering crust weathering alteration index calculation formula is fitted;The molar ratio of element oxide is brought into the new calculation formula established, according to the size of the weathering alteration index value calculated, paragenetic metamorphic rock weathering crust is identified, and paragenetic metamorphic rock weathering crust structure is divided.The application provides important technical support for oil and gas basin paragenetic metamorphic rock weathering crust reservoir research.

The application discloses a kind of electrical parameter calculation methods of para-metamorphic rock weathering crust, comprising: reading the conventional logging curve data of the depth corresponding to para-metamorphic rock weathering alteration index;Logging curve data and para-metamorphic rock weathering alteration index data are fitted into linear relationship chart;According to the correlation of the linear relationship chart of fitting, select the logging curve with high sensitivity of para-metamorphic rock weathering crust identification;The logging curve data with high sensitivity of para-metamorphic rock weathering crust identification is normalized;Fitting para-metamorphic rock weathering crust electrical parameter calculation formula;The logging curve data after normalization is brought into formula to calculate and identify para-metamorphic rock weathering crust.The present application is based on the analysis of a large amount of logging curve data, establishes a new electrical parameter calculation model of para-metamorphic rock weathering crust, and proposes a new method for identifying para-metamorphic rock weathering crust.

The invention belongs to the technical field of oil exploration and development, and discloses a method for identifying volcanic rock weathering crust and interior periods based on multiple seismic attributes, which comprises the following steps: determining a logging chart division boundary; a seismic data volume corresponding to the logging data is read, a cross plot is drawn, and a seismic data volume correction formula is obtained through linear fitting; correcting the seismic data volume of the research area; dividing the corrected data volume through a logging plate division boundary to obtain a first probability volume P1; determining an impedance plate division boundary; performing inversion to obtain an inversion resistance body; dividing the inversion impedance body according to an impedance plate division boundary to obtain a second probability body P2; performing weighted calculation on the P1 and the P2 to obtain a volcanic rock interior period identification parameter body P3; and establishing a recognition plate by using the P3, and determining a division boundary of the recognition plate to obtain a volcanic rock interior period recognition probability body P4. According to the method, well-seismic data unification is realized, and the weathering crust and the inner curtain period can be effectively identified in combination with an impedance inversion data body prediction result.

The invention discloses a quantitative identification method for rare earth-loaded nanoparticles in a weathered crust, and relates to the field of geology. According to the method, a weathering crust sample flows through a hollow fiber flow field flow separation system along with a current-carrying liquid, the focusing time of the current-carrying liquid is controlled to be 4-14 min, the radial flow velocity of the current-carrying liquid is controlled to be 0.15-0.65 mL / min, the axial flow velocity of the current-carrying liquid is controlled to be 0.1-1.0 mL / min, and separation of rare earth-loaded nanoparticles in the weathering crust sample is achieved; and carrying out qualitative and quantitative analysis on the separated rare earth-loaded nanoparticles through an inductively coupled plasma mass spectrometer to obtain the types and contents of the rare earth-loaded nanoparticles with different particle sizes. By adopting the method provided by the invention, separation and quantitative analysis of the rare earth-loaded nanoparticles in the weathered crust can be realized, and the analysis efficiency and accuracy are improved.

The invention belongs to the field of hydrometallurgy, and particularly relates to a weathering crust illuviation type rare earth ore screening system and a layered and graded rare earth heap leaching method. The system comprises a feeding device, a screening device, a conveying device, an ore heap, a liquid preparing pool and a liquid collecting pool which are sequentially arranged, and a cofferdam is arranged at the top of the ore heap. The method comprises the following steps: 1) after an ore heap is arranged by using weathering crust elution-deposited rare earth ore, spraying a composite ammonium solution in a solution preparation pool to the top of the ore heap through a spraying pipeline, and maintaining the liquid level height in a cofferdam at 5-10cm; (2) after the composite ammonium solution is sprayed, clear water is sprayed to the top of the ore heap through a spraying pipeline, water-soluble ammonium in the ore heap is flushed out, and the rare earth dump leaching process.By means of the method, the dump leaching efficiency of the weathering crust elution-deposited rare earth ore can be effectively improved, the ore leaching period is shortened, the rare earth leaching rate is increased, and the consumption of a leaching agent in the dump leaching process is reduced.

The application discloses a method and system for predicting the occurrence depth of an ore body of a weathered crust type rare earth deposit, and relates to the technical field of geological exploration. The method comprises the following steps: performing on-site testing on the weathered crust by using a high-density electrical method; calculating and inverting the testing results to obtain apparent resistivity data of the weathered crust at different depths; correcting the distortion values of the apparent resistivity data with the terrain fluctuation according to the terrain of the weathered crust, obtaining the apparent resistivity data of the weathered crust at different depths after the terrain correction by using a ratio method, and further obtaining a first derivative curve of the apparent resistivity changing with the depth, and determining the occurrence depth of the rare earth ore body in combination with a logistic regression model parameter. The application uses the variation law of the apparent resistivity of the weathered crust at different depths to find out the groundwater structure of the weathered crust, further uses the logistic regression model parameter to determine the position of the ore body of the weathered crust type rare earth deposit, so as to accurately predict the occurrence depth of the rich ore layer of the weathered crust type rare earth deposit, and efficiently and accurately explore the rare earth ore body in the weathered crust.

The invention provides penicillium, a composite ore leaching agent based on the penicillium and an ore leaching method of weathering crust elution-deposited rare earth ore. The penicillium XT-1 is preserved in the China Center for Type Culture Collection (CCTCC), the preservation number is CCTCC NO: M20242845, the preservation number is CCTCC NO: M20242845, the preservation number is CCTCC NO: M20242845, and the preservation number is CCTCC NO: M20242845. The composite mineral leaching agent comprises a microbial metabolite of Penicillium sp. XT-1, ammonium sulfate and hydrochloric acid. In the rare earth leaching process, efficient selective extraction of rare earth elements is achieved through the biological-chemical synergistic effect, the problems that a traditional chemical leaching method is large in pollution and large in chemical reagent and energy consumption are solved, and the common problems that the mineral utilization rate is low and leaching is difficult in biological hydrometallurgy are solved.

The present application relates to ion type rare earth ore detection technical field, especially ion type rare earth ore weathering crust resistivity in-situ vertical measurement and detection device, including installation box, the installation box left and right two side walls are provided with a back strap, the installation box top is connected with the installation cover through the positioning assembly, the installation cover bottom is provided with the bottom plate, the installation cover and the bottom plate between setting up detection assembly, the installation cover is provided with the adjusting assembly for adjusting the detection assembly spacing adjustment assembly. The device through the screw rod, hand wheel and the linkage structure of the one slot plate of adjusting assembly, can drive the guide sleeve to drive the electrode probe along the sliding groove flexible translation, realize the equal interval adjustable of electrode spacing, can accurately match the detection demand of different thickness weathering crust, greatly improve the measurement range and environmental adaptability.

The present application belongs to the technical field of petroleum exploration, and discloses a method for identifying a thrust anticline trap of a buried hill in a rift basin, comprising: obtaining a three-dimensional seismic data volume of the rift basin containing stratum horizon data; selecting a seismic profile in a direction substantially perpendicular to the extension direction of the rift basin to identify a thrust fault; selecting a seismic profile and a seismic isochronous slice of the upthrown side of the thrust fault to identify a thrust anticline structure of the buried hill; and judging whether the thrust anticline structure of the buried hill develops a weathering crust reservoir and an overlying layer simultaneously, and if so, identifying the thrust anticline trap of the buried hill in the rift basin as effective. In the present application, the selection of the seismic profile in the direction substantially perpendicular to the extension direction of the rift basin can improve the success rate of identifying the concealed thrust fault in the buried hill. The method of combining the seismic profile and the seismic isochronous slice to identify the thrust anticline structure can improve the identification accuracy of the thrust anticline of the buried hill.

The invention discloses an alkaline leaching-acid leaching combined leaching method for basalt weathering crust type scandium ore. The alkaline leaching-acid leaching combined leaching method is used for solving the problem that the leaching rate of a traditional leaching mode (direct leaching) is low. NaOH is adopted as a leaching agent for the ground basalt weathering crust type scandium ore, water bath heating and stirring are utilized for leaching, a leached solid-phase substance is washed with water to be neutral and dried, and the dried solid-phase substance is leached with H2SO4. Compared with a direct leaching method, alkali-acid combined leaching effectively improves the leaching rate of Sc in the basalt weathering crust, the concentration of H2SO4 used in the test process is lower, and the method is environmentally friendly and low in economic cost. Due to the fact that main Sc-containing minerals are often linked with acid-insoluble minerals or are wrapped by the acid-insoluble minerals, Sc cannot be effectively released through simple direct acid leaching, the purpose that alkali is used for leaching firstly is to destroy crystal lattices of external minerals through alkali leaching to enable the Sc-containing minerals to be exposed, then acid leaching is adopted to enable the Sc to be dissolved out and released into leaching liquid, and the leaching time is shortened. Therefore, the leaching rate of Sc is effectively improved.

The application relates to the field of rare earth mining, and particularly discloses a method for measuring in-situ leaching kinetics rate of weathering crust eluvial type rare earth ore, which comprises the following steps: step 1, obtaining a corresponding relation curve of rare earth ion concentration in leaching solution and effluent volume through column leaching test, as a test curve; step 2, combining ion exchange balance, leaching kinetics and ion transport in the leaching process, establishing a theoretical model of the column leaching test, and obtaining a corresponding relation curve of rare earth ion concentration in leaching solution and effluent volume through numerical simulation, as a simulation curve; and step 3, adjusting the kinetics coefficient in the theoretical model of the column leaching test, so that the simulation curve is consistent with the test curve, and the kinetics coefficient in the theoretical model of the column leaching test is the kinetics coefficient in the in-situ leaching process. The application can restore the in-situ leaching process as much as possible, obtain the kinetics coefficient suitable for the in-situ leaching process, and avoid the limitation of sampling conditions in beaker or flask test.

The invention relates to the technical field of hydrometallurgy, in particular to a method for neutralizing, precipitating and removing impurities from a rare earth leaching solution of weathering crust eluviation type rare earth ore and application. The method is characterized by comprising the following steps: slowly adding a precipitator into the rare earth leaching solution of the weathering crust elution-deposited rare earth ore until the pH value is 5-6, and carrying out solid-liquid separation to obtain an aluminum-containing precipitate and aluminum-removed rare earth feed liquid after the stirring reaction is completed. Compared with an existing method, the method has the advantages that the impurity removal rate is higher, the rare earth loss rate is lower, and sediment sedimentation is faster. And the precipitant is easy to obtain and store, green and environment-friendly, low in cost and simple in precipitation process, and has a relatively good application value.

The invention discloses a granite ancient buried hill weathering crust thickness determining method, device and equipment and a medium. The method comprises the steps that according to drilling data of at least two drilling wells of a target granite ancient buried hill, the true thickness values of the weathering crust of at least two drilling point positions are determined; determining a granite weathering influence factor value according to the true thickness values of the weathering crust of the at least two well drilling points and a predetermined relationship between the thickness of the weathering crust and the granite weathering influence factor; and determining a weathering crust thickness distribution result of the target granite ancient buried hill according to the granite weathering influence factor value and the relationship between the weathering crust thickness and the granite weathering influence factor. By adopting the scheme of the invention, the thickness distribution condition of the unknown granite ancient buried hill weathering crust in the low exploration mature area can be accurately predicted, and a basis is provided for exploration decision and exploration well deployment.

This specification relates to the field of oil and gas exploration technology, specifically disclosing a method and apparatus for determining the effective reservoir distribution of granite weathering crust. The method includes: analyzing seismic facies types and distribution characteristics based on three-dimensional seismic data of the target granite weathering crust reservoir; extracting reservoir attribute characteristics of the target granite weathering crust reservoir along the layer using maximum amplitude attributes to obtain seismic sensitivity attribute distribution characteristics; delineating the vertical structure of the target granite weathering crust reservoir using well logging data; calibrating the vertical structure with the seismic facies types of the target granite weathering crust reservoir to establish a correspondence between seismic facies types and vertical structure; and determining the effective reservoir distribution characteristics of the target granite weathering crust reservoir based on the seismic facies distribution characteristics, seismic sensitivity attribute distribution characteristics, and the correspondence between seismic facies types and vertical structure. This method can accurately determine the effective reservoir distribution characteristics.

The present application relates to the field of oil exploration, in particular to a carbonate rock weathering crust reservoir characterization method, equipment and medium. The method comprises fault probability body calculation and calibration; according to the fault development mode of the research area, the fault sample label definition is carried out in the seismic profile; the AI basic model is optimized by using the transfer learning technology to obtain the AI fault prediction model; the label definition and model optimization are carried out on the reservoir body to obtain the AI bead reservoir prediction model; the fault probability body and the bead reservoir obtained by AI image recognition are used to carry out three-dimensional space stereoscopic sculpture. The present application is based on AI image recognition to predict carbonate rock weathering crust reservoir, the prediction effect is improved, the influence of geological factors such as karst boundary and river channel on the prediction result is reduced, finally, based on the AI prediction data body, three-dimensional stereoscopic sculpture technology is used to realize accurate characterization of three-dimensional space characteristics of carbonate rock weathering crust reservoir.

The invention discloses a method for enriching and selectively leaching scandium in weathering crust type scandium ore, which belongs to the technical field of physical separation and chemical industry, and comprises the following steps: carrying out crushing and magnetic separation on the weathering crust type scandium ore to obtain iron and titanium magnetic components and scandium-rich non-magnetic components; and mixing the scandium-rich non-magnetic component with ferric sulfate, roasting, and adding water into the roasted clinker for leaching reaction to obtain scandium-containing leachate. According to the method, scandium in the weathering crust type scandium ore can be effectively enriched and leached, good potential economic benefits are achieved, and a technical route is provided for comprehensive resource utilization of the weathering crust type scandium ore.

This invention discloses a method and system for estimating the erosion intensity of a granite weathering crust watershed. The method includes: setting up a sample plot at the granite weathering crust watershed, collecting coarse quartz particles from the surface of the sample plot and weathering crust soil at different depths of the sample plot; sorting coarse quartz particles of different sizes; determining the particle size of the selected test coarse quartz particles based on the enrichment rate of coarse quartz particles of different sizes; conducting splash erosion and weathering tests on the selected coarse quartz particles of different sizes to obtain the splash erosion rate and weathering rate of the coarse quartz particles; and calculating the erosion intensity of the granite weathering crust watershed over a certain period of time based on the selected coarse quartz particles of different sizes, the enrichment amount of coarse quartz particles on the surface of the sample plot, the splash erosion rate and weathering rate of the coarse quartz particles, and the content of coarse quartz particles in the weathering crust soil. This invention utilizes the content of coarse quartz particles in the weathering crust, as well as the enrichment, splashing, and weathering rate of coarse quartz particles on the surface of the watershed, to estimate the erosion intensity of the granite weathering crust watershed. It can effectively assess the erosion status of the granite weathering crust in areas without erosion monitoring, and provide a reference for the management of soil and water loss in the granite weathering crust.

The present invention discloses a method, system, equipment, medium and program product for evaluating weathering crust rare earth resources, including: firstly, using a seismic station within the scope of the mining area to be evaluated to collect first seismic signal data; preprocessing the first seismic signal data to obtain second seismic signal data; segmenting the second seismic signal data to obtain third seismic signal data; marking the transient interference occurrence point of the seismic signal based on a multi-window long-short time window ratio algorithm, and obtaining fourth seismic signal data according to the marking result; obtaining the peak frequency of the spectrum ratio curve according to the three-component vibration spectrum density of the fourth seismic signal data, and calculating the thickness of the weathering crust in the corresponding area; constructing a rare earth ore prediction model based on geological exploration data; inputting the thickness of the weathering crust into the prediction model to obtain the evaluation result of the weathering crust rare earth resources in the mining area to be evaluated. The present invention effectively improves the evaluation efficiency and accuracy of the evaluation of weathering crust rare earth resources.

The invention belongs to the technical field of natural gas exploration and development, and discloses a fault control type karst residual hill weathering crust gas reservoir favorable area optimization method and related device.The method comprises the steps that well seismic data in a target area are obtained, marker beds are selected according to the well seismic data for layer position calibration, and the stratum thickness of each layer is counted; according to the horizon calibration and the stratum thickness, an impression method and a trend surface removing method are adopted to recover ancient landform and micro-ancient landform forms, and a target area weathering crust interface top surface structure and a fracture distribution diagram are compiled; and calculating an ancient landform evaluation index, a structure evaluation index and a fault evaluation index at the deployment well point according to the ancient landform, the micro-ancient landform, the weathering crust interface top surface structure and the fracture distribution diagram, solving a comprehensive evaluation index of a favorable region, and screening a favorable target region. According to the method, the relevance and interaction of different control factors are explored, a multi-factor fusion method is provided to solve the favorable area, and the method has better evaluation means and accuracy.

The present application relates to the field of petroleum geological exploration, and discloses a buried hill weathered crust reservoir prediction method and system based on seismic reflection intensity difference detection, a medium and equipment, comprising: sequentially performing trace equalization, spherical diffusion correction, multi-stage amplitude-preserving denoising and sparse inversion on post-stack seismic data, and outputting high signal-to-noise ratio, high resolution and amplitude-preserving seismic profiles; based on the seismic profiles, a multi-parameter fusion reflection intensity is obtained, complex seismic traces are extracted through Hilbert transform, amplitude envelope, instantaneous phase gradient and frequency attenuation coefficient are calculated, and the reflection intensity of the target interface is obtained through weighted fusion; based on the reflection intensity of the target interface, the relative intensity ratio and the absolute intensity ratio are calculated, and the reservoir level is calibrated in combination with core data. The present application solves the technical problems of "poor seismic data quality, one-sided reflection intensity characterization and disturbed quantitative indicators" in the existing buried hill weathered crust reservoir analysis, and realizes high-precision reservoir evaluation under post-stack data.

The invention discloses a circulating bubble leaching method for efficiently removing residual ammonium salt in a weathering crust eluviation type rare earth closed mine field. The circulating bubble leaching method comprises the following steps: preparing a low-concentration composite leaching solution containing a surfactant; pumping the composite leacheate into an elution column which is connected with a microporous aeration device and is filled with a weathering crust elution type rare earth sample; and circularly leaching under the condition of bubbles less than 100 microns until the concentration of ammonium in the obtained leacheate reaches elution equilibrium, thereby completing the leaching of the residual ammonium salt. According to the method, the metal salt and the surface active agent are used for preparing the composite eluting agent, calcium ions and the like obtained through synchronous elution from the tailings are fully utilized, the concentration of the metal salt in the eluting solution is reduced, and the circulating bubble eluting technology is combined, so that the gas-liquid-solid three-phase contact area is increased, desorption of NH4 < + > is accelerated, and efficient elution of residual ammonium salt is promoted; the method has the advantages of low eluant concentration, high elution efficiency and the like, and can provide a new idea for efficient repair of the rare earth closed mine field.

The invention discloses a method for analyzing distribution characteristics and restricting factors of rare earth elements in a granite weathering profile, and belongs to the field of mineral resource analysis, the analysis method comprises the following specific steps: I, recording the layering condition of the granite weathering profile, and collecting and analyzing each layer of sample; iI, analyzing the element enrichment degree in each sample, and evaluating the weathering degree of each sample; iII, recording the content and weathering characteristics of major elements in each sample; iV, analyzing influence factors of migration and enrichment of rare earth elements in various granite weathering crust according to a recorded result; according to the method, migration and enrichment behaviors of the rare earth elements in the vertical section can be comprehensively mastered, background differences are effectively eliminated, the scientificity of behavior comparison of the rare earth elements between different layers is improved, the enrichment and distribution mechanism of the rare earth elements under the medium weathering degree is revealed, and the mineral stability can be judged.

The present application relates to the technical field of seismic data interpretation, and discloses a method for predicting the thickness of buried hill weathering crust reservoirs, which comprises the following steps: obtaining the wave peak amplitude, wave trough amplitude and relative amplitude ratio of wave peak-wave trough of the weathering crust reservoir; inputting a buried hill weathering crust reservoir thickness prediction model to obtain the predicted value of the weathering crust reservoir thickness. The buried hill weathering crust reservoir thickness prediction model is constructed by the following method: obtaining multiple sets of well point data pairs through multiple wells passing through the weathering crust; constructing a first fitting function of the wave peak amplitude and the wellbore thickness, a second fitting function of the wave trough amplitude and the wellbore thickness, and a third fitting function of the relative amplitude ratio of wave peak-wave trough and the wellbore thickness according to the multiple sets of well point data pairs; and constructing the weathering crust reservoir thickness prediction model: weathering crust reservoir thickness=(α first fitting function+β second fitting function+γ third fitting function) / (α+β+γ), which can improve the accuracy of the predicted value of the weathering crust reservoir thickness.

This invention relates to the field of seismic data processing technology, and discloses a method for constructing a weathered crust reservoir thickness prediction model and predicting the thickness of weathered crust reservoirs. The method includes: calibrating three-dimensional seismic data using well logging data from multiple wells passing through the weathered crust to obtain first seismic data; performing adaptive dip-constrained median filtering on the first seismic data to obtain second seismic data; performing Gilbert transform on the second seismic data to obtain a three-dimensional instantaneous frequency data volume; acquiring multiple sets of well point data pairs; and fitting an expression for the weathered crust reservoir thickness based on the multiple sets of well point data pairs to obtain a weathered crust reservoir thickness prediction model. In the embodiments of this invention, the instantaneous frequencies corresponding to the reflection peaks, reflection troughs, and zero amplitude points are combined using linear equations, reducing the instability in thickness prediction caused by frequency phase interference when the weathered crust reservoir is thin, thus making the predicted thickness value of the weathered crust reservoir more accurate.

The invention relates to the field of hydrometallurgy. The invention relates to a leaching agent, in particular to a leaching agent for weathering crust illuviation type rare earth ore and a preparation method and application of the leaching agent. In order to strengthen the leaching of medium and heavy rare earth, reduce the waste of resources, ensure the safety of the mine and realize the efficient and low-impurity safe leaching of the weathering crust elution-deposited rare earth ore, the invention provides the leaching agent for the weathering crust elution-deposited rare earth ore as well as the preparation method and the application thereof, so that the leaching of the medium and heavy rare earth is improved while the leaching rate of the rare earth is ensured; the leaching rate of impurity aluminum is reduced, the expansion rate of clay minerals is reduced, and the production safety of mines is guaranteed.

The application discloses a kind of weathering alteration index calculation methods of orthometamorphic weathering crust, comprising: the mass percentage of element of mud logging cuttings is determined;The mass percentage of element is normalized;The mass percentage of element after normalization is converted into the mole ratio of oxide;According to the change trend of element oxide mole ratio, the relative loss and relative enrichment trend of various elements in orthometamorphic weathering crust are judged;According to the trend of element relative loss or enrichment, the easily soluble element and the element easy to remain are determined, and the calculation formula of new orthometamorphic weathering crust weathering alteration index is fitted;The mole ratio of element oxide is brought into the new calculation formula established, and according to the size of the weathering alteration index value calculated, orthometamorphic weathering crust is identified, and the structure of orthometamorphic weathering crust is divided.The present application provides important technical support for oil and gas basin orthometamorphic weathering crust reservoir research.