13 results about "Weathering crust" patented technology

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 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 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 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 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.

The invention discloses a volcanic rock weathering crust structure division method and device, equipment and a medium, and relates to the technical field of petroleum geological exploration and development, a first indication parameter formula for indicating weathered clay and porosity increase is constructed, and a normalized logging curve, a weathering index and a geological division weathering crust structure correlation relationship are analyzed to obtain a first indication parameter formula; obtaining a first undetermined coefficient, and calculating a first indication parameter; constructing a second indication parameter formula of rock mechanical characteristic change, analyzing a correlation relationship between rock color, rock breaking characteristics, the normalized logging curve, the weathering index and a geological division weathering crust structure to obtain a second undetermined coefficient, and calculating a second indication parameter; and performing weathering crust structure division on the volcanic rock according to the first indication parameter and the second indication parameter to obtain a volcanic rock weathering crust structure division result. According to the method, the volcanic rock weathering crust structure division accuracy can be improved, the volcanic rock weathering crust structure division complexity is reduced, and the volcanic rock weathering crust structure division efficiency is improved.

The application provides a weathered crust-interior structure integrated prediction method for metamorphic buried hill reservoirs. The weathered crust-interior structure integrated prediction method for metamorphic buried hill reservoirs comprises the following steps: S1, reservoir geological feature analysis and structure division; S2, reservoir parameter prediction based on prestack simultaneous inversion; S3, single-unit multi-attribute fusion fracture modeling; S4, ground stress modeling and fracture effectiveness evaluation; and S5, reservoir comprehensive quantitative evaluation and favorable area prediction. The weathered crust-interior structure integrated prediction method for metamorphic buried hill reservoirs has the advantages of being capable of integrating multidisciplinary information and realizing integrated characterization and quantitative prediction of weathered crust and interior reservoirs.

This invention discloses a surfactant-based composite leaching agent for weathered crust leached rare earth ores. It is a composite solution formed primarily from a composite cationic surfactant and an inorganic leaching agent solution. The composite cationic surfactant is composed of hexadecyltrimethylammonium bromide and dodecyltrimethylammonium bromide. This surfactant-based composite leaching agent effectively increases the penetration rate of the leaching agent solution into the ore body, increases the leaching rate of rare earth elements, inhibits the leaching of aluminum impurities, and suppresses the expansion of the ore body, thus maximizing the leaching process of rare earth elements. Furthermore, the application method is simple, efficient, and suitable for widespread application.

The application discloses a kind of electrical parameter calculation methods of orthometamorphic rock weathering crust, comprising: reading the conventional logging curve data of the depth corresponding to orthometamorphic rock weathering alteration index;Logging curve data and orthometamorphic 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 orthometamorphic rock weathering crust identification;The logging curve data with high sensitivity of orthometamorphic rock weathering crust identification is normalized;Fitting orthometamorphic rock weathering crust electrical parameter calculation formula;The logging curve data after normalization is brought into orthometamorphic rock weathering crust electrical parameter calculation formula.The present application is based on the analysis of a large amount of logging curve data, establishes a new orthometamorphic rock weathering crust electrical parameter calculation model, and proposes a new method for identifying orthometamorphic rock weathering crust.