24 results about "Fluid inclusions" patented technology

This invention provides a cryo-laser ablation chamber for reflected light fluid inclusions, belonging to the field of geosciences for the analysis of the composition of single fluid inclusions. The device mainly consists of an outer shell, a cryo chamber, an ablation chamber, and a top cover. The cryo chamber, located at the bottom of the outer shell, is made of pure silver, and its top is mirror-polished and connected to a liquid nitrogen tank and pump via a Teflon hose. The ablation chamber, located above the liquid nitrogen chamber, has a standard sample mounting hole. The chamber is spindle-shaped and has inlet and outlet ports at both ends, connected to a carrier gas pipeline. The top cover is equipped with a calcium fluoride glass viewing window, allowing 193nm laser light to pass through. This invention uses a silver cryo chamber to ensure the required cooling effect; simultaneously, the mirror design at the top of the cryo chamber converts the light emitted by the reflected light microscope into transmitted light, thus enabling precise observation and positioning of the fluid inclusions under test without relying on conventional transmitted light systems.

The embodiment of the application provides a preparation method of a fluid inclusion microthermometric ore slice, comprising the following steps: providing a fluid inclusion slice which has been observed and circled under an optical microscope in detail for microthermometric target fluid inclusion position; putting the whole fluid inclusion slice into a glass culture dish, injecting a slice adhesive dissolving solution into the culture dish, and immersing the whole fluid inclusion slice in the slice adhesive dissolving solution to dissolve the slice adhesive and separate the fluid inclusion ore slice from the bonding surface of the glass slide; after the separation, placing the fluid inclusion ore slice with the adhesive surface upward on the surface of the glass slide and immersing it in the slice adhesive dissolving solution; after the slice adhesive on the surface of the fluid inclusion ore slice is completely dissolved, cutting the fluid inclusion ore slice according to the position of the target inclusion to be measured and thermometric, and preparing a rock and mineral fragment containing the target fluid inclusion which is suitable in size to be placed in a cold and hot stage quartz crucible.

The invention belongs to the field of petroleum geological exploration, particularly relates to a method for determining the reservoir forming time of a deep concave area of a continental facies fault lake basin, and aims to solve the problems that the reservoir forming time of the deep concave area of the continental facies fault lake basin can only be obtained in a semi-quantitative manner and the reservoir forming time of the deep concave area of the continental facies fault lake basin is easily misjudged in the prior art. The method comprises the following steps: determining an oil-containing well section, selecting sandstone with developed calcite cement as a sample, and making the sandstone into slices; determining the type of a fluid inclusion, and further determining the type of an oil inclusion; obtaining the rare earth element partition mode similarity of the slices, and confirming the cementation period of the slices; selecting slices which contain the native inclusion and are in the same cementation period, and making the slices into a circular target sample; and performing U and Pb element scanning on the circular target sample, and performing U-Pb age calculation through a graphical method to obtain the reservoir forming age of the deep concave area of the continental disruption lake basin. According to the method, quantitative analysis of the reservoir forming time of the deep concave area of the continental fault lake basin is realized, and the correctness of reservoir forming time judgment is improved.

To provide a method capable of easily estimating a position of a deepest part of a mineral vein in a short period.SOLUTION: A depth estimation method of a hydrothermal vein such as a hydrothermal vein-type gold deposit, includes the steps of: measuring a temperature of each of a plurality of fluid inclusions contained in quartz collected from different depths of a target vein under prescribed conditions, for example, by microthermometry to calculate a temperature and a salt concentration of hydrothermal water when the hydrothermal water is incorporated into the quartz; calculating a boiling curve representing a relation between a boiling point and a depth of the hydrothermal water having the salt concentration; and estimating a position of a deepest part of the target vein by collating the boiling curve with a relation curve between the temperature and the depth of the hydrothermal water using an ancient groundwater surface as a reference, under geological conditions including the target vein.SELECTED DRAWING: Figure 1

The application discloses a kind of quantitative evaluation method and device of oil and gas along fault to river channel sand body filling capacity, first, according to fluid inclusion analysis, oil and gas reservoir forming period is identified, and oil and gas reservoir forming period and time are determined;Then, according to the result of seismic data interpretation, the configuration relationship of fault and hydrocarbon source rock is analyzed, and gas source fault is determined;Then, in combination with the configuration relationship of fault and sand body, its evolution and the recovery result of porosity evolution, and the historical data of porosity-permeability relationship, the filling capacity evaluation parameter of key reservoir forming period is obtained;Then, in combination with the relationship between filling capacity evaluation parameter and sand body gas content, the weight coefficient of different parameters on the influence of natural gas filling is determined, and then the filling capacity coefficient of each river channel sand body is calculated, so that the selective filling strength of oil and gas along fault to each river channel sand body is obtained.The application realizes the quantitative evaluation of oil and gas along fault to river channel sand body filling capacity, and based on the evaluation result, favorable gas-bearing river channel sand body can be further predicted.

The application provides a clastic rock gas reservoir paleo-pressure calculation method. Through analysis of test data of overburden porosity and formation compaction coefficient of sandstone samples in a test area, in combination with definitions of rock formation compaction coefficient and effective pore volume compression coefficient, a formula for characterizing pore volume change in a geological history period is established. The effective pore volume compression coefficient is calculated through measured data and a rock physical model, and then the change of the pore volume in each history period is obtained. When the reservoir is a dry gas or wet gas reservoir, the measured pressure and temperature of the present reservoir are taken as a starting point, in combination with a simulated formation thermal evolution history paleo-temperature curve, and then the reservoir paleo-pressure value in each history period is calculated. To some extent, the problem that the previous calculation method relies on microfluid inclusion observation and test and is difficult to continuously calculate the paleo-pressure in each history period is solved, which plays an important role in basin analysis and oil and gas accumulation dynamics research, and has important industrial application value in oil and gas exploration and evaluation.

This invention belongs to the field of geological and mineral survey technology, specifically involving a comprehensive survey system for the rubidium enrichment mechanism of metamorphic rocks based on micro-area in-situ technology. It includes a module for precise characterization of rubidium occurrence state through in-situ petrography, a module for multi-dimensional isotopic mass spectrometry combined with analysis, a module for quantitative inversion of rubidium migration and enrichment behavior, and a module for spatiotemporal coupling and mineralization prediction of multi-stage metamorphic events. These four modules adopt a dual-closed-loop coupling architecture. This invention achieves a significant improvement in spatial characterization accuracy and comprehensiveness, completely overcoming the limitations of existing two-dimensional characterization techniques. By establishing an X-Y-Z three-dimensional coordinate system through a three-dimensional spatial coordinate calibration unit, it achieves full-dimensional characterization of rubidium in the plane and depth directions of metamorphic rock samples. Combined with hierarchical chemical extraction and time-of-flight secondary ion mass spectrometry nanoscale surface scanning technology, it achieves for the first time precise decoupling of the three occurrence states of rubidium: lattice state, adsorption state, and fluid inclusion state, breaking through the technical bottleneck of traditional methods being unable to distinguish the occurrence states of rubidium.

The application discloses a pegmatite high-purity quartz purification method and a purity extraction evaluation method, wherein the purification method comprises the following steps: S1, selecting a quartz sample C from a pegmatite high-purity quartz sample collected from the field by means of naked eye observation, microscopic slice observation and whole rock analysis; S2, performing laser confocal Raman spectrum determination on the quartz sample C to obtain typical characteristic peak value data and lattice Al data of fluid inclusions in the quartz sample C, removing the quartz sample that does not meet the requirements based on the lattice Al data to obtain a quartz sample D; S3, performing fluid inclusion temperature measurement on the screened quartz sample D, and selecting a quartz sample E with a homogenization temperature less than 600 DEG C from the quartz sample D; and performing explosion on the quartz sample E to obtain a final purified product. The application also provides a purity extraction evaluation method for the pegmatite high-purity quartz. The application realizes purification of the pegmatite high-purity quartz and grading evaluation of the purified quartz.

The invention discloses a rock cross-cut rubidium deposit rubidium occurrence state and deposit cause analysis method and device and a medium, and belongs to the technical field of deposit cause analysis. A first strain mode sample and a second strain mode sample are distinguished based on divergence characteristics of strain space distribution, and a first-class rubidium occurrence horizon and a first-class enrichment mechanism are judged by utilizing a space lag relationship between an isotope fractionation peak position and a strain peak position; and judging a second-class rubidium occurrence layer and a second-class enrichment mechanism according to a rubidium concentration gradient mutation position around the fluid inclusion, and coupling an enrichment direction of a sample scale with a fracture structure or a permeable stratum to delineate a mineralization area. According to the method, the lattice position quantitative judgment of the rubidium occurrence state, the dynamic process distinguishing of the mineralization mechanism and the geologic structure constraint delineation of the mineralization area are realized.

The present application belongs to the technical field of determining the evolution period of strike-slip faults in the edge of craton, and particularly relates to a method for determining the evolution period of strike-slip faults in the edge of craton based on multi-source data analysis. Three-dimensional reflection seismic data, well logging data and core samples from multiple wells in the target area are collected, and the core samples are from Sinian, Cambrian, Permian and Triassic strata. The seismic data is interpreted to determine the seismic reflection layer and make a coherent attribute map and a time domain structure map, and the fracture plane distribution characteristics and profile structure style are analyzed. The petrology of the core samples is characterized, including scanning electron microscope observation, energy spectrum testing, cathodoluminescence microscope observation, identification of fracture filling characteristics, cutting relationship and diagenetic mineral filling generation, and fluid inclusion analysis of the fracture filling vein samples.

This invention discloses a method for deep removal of fluid inclusions from quartz sand using molten salt electrolysis, belonging to the field of quartz sand purification technology. This method uses vein quartz as raw material, which undergoes crushing, sieving, magnetic separation, and flotation followed by high-temperature calcination and ice-water quenching pretreatment to induce microcracks on the quartz sand surface. A molten salt electrolysis cell is then prepared under a dry nitrogen atmosphere using a nickel alloy as the cathode, graphite as the anode, and a lithium-based electrolyte salt as the electrolyte. The pretreated quartz sand is placed near the cathode and electrolyzed for 2-30 minutes using a 2-24V DC pulse voltage. The electric field causes dielectric breakdown and rupture of the fluid inclusions, driving the directional migration of impurity ions. Finally, the sand is washed with boiling water, leached with mixed acid, washed again, and dried to obtain high-purity quartz sand with a SiO2 purity of not less than 4N8. This invention solves the problem of removing tiny fluid inclusions using traditional methods through the synergistic effect of thermal explosion and molten salt electrolysis. It has low energy consumption, high purification effect, and the prepared high-purity quartz sand can meet the application needs of high-end industries such as semiconductors and photovoltaics.

The invention discloses a stratum denudation thickness calculation method, which comprises the following steps: acquiring different-depth ground temperature data of a target stratum through a thermal advection coupling ground temperature field inversion model, extracting paleo-temperature data of a fluid inclusion in a rock core sample by using a fluid inclusion paleo-temperature scale denudation model, and determining paleo-ground temperature gradient change characteristics; processing mudstone porosity data by adopting a mudstone compaction curve dynamic fitting algorithm, establishing a dynamic relationship between the porosity and the buried depth, and optimizing a compaction curve; the data are input into a three-dimensional stratum denudation modeling analysis platform, a target stratum three-dimensional space structure model is constructed, modeling parameters are adjusted in combination with ground temperature gradient change and ancient ground temperature evolution characteristics, and the stratum denudation process is simulated; and finally, according to a simulation result and mudstone compaction degree parameters, calculating denudation thicknesses of different positions of the target stratum. According to the method, through cooperative application of multiple models and an algorithm, the accuracy of stratum denudation thickness calculation is improved.

The application discloses a metallogenic prediction method and device based on fluid parameters and fluid field modeling, a medium and a product, and relates to the field of metallogenic prediction. First, petrographic study is carried out on fluid inclusion samples of a target area to determine the metallogenic stage; the fluid inclusion samples of different metallogenic stages are analyzed and tested to obtain multiple fluid parameters; exploratory data analysis is performed on the multiple fluid parameters to screen out key fluid parameters closely related to the content of main ore-forming elements; a machine learning or deep learning algorithm is used to model the numerical relationship between the key fluid parameters and the main ore-forming elements to determine an optimal numerical model; the key fluid parameters are processed by using different spatial interpolation algorithms to establish a three-dimensional fluid field model; according to the three-dimensional fluid field model and the optimal numerical model, three-dimensional metallogenic prediction is carried out in combination with metallogenic geological elements to determine a prospecting target area; since the fluid parameters are introduced as prediction variables, the accuracy of metallogenic prediction is improved.

The invention discloses a superimposed basin multi-stage reservoir formation probabilistic identification method based on fluid inclusion and U-Pb dating coupling and a Bayesian network, and relates to the technical field of geological analysis, and the method comprises the steps: collecting and preprocessing basic data including fluid inclusion parameters, U-Pb isotope age of reservoir cement, hydrocarbon source rock data, tectonic activity periods and cover layer parameters; establishing a multi-dimensional geological database; and establishing a time-temperature coupling calibration model by utilizing an inclusion uniform temperature and U-Pb age matching equation, and calibrating paleo-temperature to reflect reservoir forming thermodynamic conditions. According to the method, the dynamic parameters of the fluid inclusion and the U-Pb dating technology are combined, accurate and quantitative recognition of the multi-stage reservoir forming process of the superimposed basin is achieved, the time-temperature coupling calibration model is constructed, the paleotemperature is calibrated to reflect the reservoir forming thermodynamic condition, the recognition error caused by a single data source in a traditional method is effectively avoided, and the recognition accuracy is improved. And the accuracy and the reliability of multi-stage reservoir formation identification are obviously improved.

The invention relates to a method for measuring the gas-liquid ratio of a fluid inclusion, which comprises the following steps: sample preparation: cutting a rock sample into temperature measuring sheets, polishing, and positioning a target fluid inclusion; sound tweezers are locked, wherein a standing wave sound field is generated by combining high-frequency sound waves with a piezoelectric transducer array and a holographic acoustic lens or phased array technology, and bubbles in the inclusion are locked; raman spectrum verification: before and after the acoustic tweezers are locked, scanning the inclusion by adopting a Raman spectrum technology, and verifying that the sound field operation does not cause phase change or component loss by comparing peak position offset; performing Raman three-dimensional CT scanning and deformation correction: performing layer-by-layer scanning on the inclusion by utilizing a Raman microscope, constructing three-dimensional component distribution information of the inclusion, analyzing and simulating the influence of sound radiation pressure on the bubble form through a finite element, establishing a relation model of bubble deformation and sound field intensity, and correcting an initial volume calculation result; and gas-liquid ratio calculation: calculating a gas phase volume, a liquid phase volume and a sub-mineral volume in combination with the corrected three-dimensional model.

The invention discloses a method, a device and equipment for determining the multi-stage crude oil filling time of a superimposed basin, and the method comprises the steps: carrying out the preliminary division of the crude oil filling periods of the superimposed basin based on the physical property parameters of hydrocarbon inclusions in rock samples corresponding to oil reservoirs in the superimposed basin; based on the burial depth and thickness of the current stratum, the burial type of the superimposed basin is recovered in a mechanical compaction correction mode; projecting the uniform temperatures of the saline water inclusions in different charging periods to a superimposed basin burial history by using a fluid inclusion method so as to obtain the possible time of crude oil charging in different charging periods; and determining the U-Pb geological age of the diagenetic mineral corresponding to the charging period in the rock slice sample based on a U-Pb dating test result of the diagenetic mineral corresponding to the charging period comprising at least two possible times of crude oil charging. And correcting the possible time of crude oil filling based on the U-Pb geological age of the diagenetic minerals and determining the multi-stage crude oil filling time of the superimposed basin.

The application discloses a machine learning-based automatic measurement system for the homogeneous temperature of a fluid inclusion, comprising an automatic control module, an intelligent image analysis module and a homogeneous temperature determination module. The automatic control module controls a microscopic temperature measurement device through a multi-modal communication fusion mode composed of graphical interface automation, inter-process communication and serial communication; the intelligent image analysis module uses a cascaded deep learning model to realize target detection, semantic segmentation and gas-liquid ratio calculation of the inclusion; and the homogeneous temperature determination module automatically determines the homogeneous state based on dynamic monitoring of the gas-liquid ratio and in combination with a staged temperature rising strategy and a stable time window mechanism. The application realizes full-process automation of the homogeneous temperature measurement of the fluid inclusion, significantly improves the measurement efficiency and the objectivity of the results, and can realize automatic control of the device without modifying the phase closing source software.

This specification provides a method and apparatus for determining the identification results of shale oil enrichment areas. Petrographic and diagenetic sequence processing is performed on vein samples to determine the host minerals corresponding to fluid inclusions at different accumulation stages; fluorescence information of fluid inclusions in the host minerals is obtained; based on the fluorescence information, the equivalent maturity and abundance parameters of fluid inclusions in the host minerals are determined; in-situ and isotopic tests are performed on the host minerals to obtain time constraint parameters and formation temperature parameters; based on the equivalent maturity, abundance, time constraint, formation temperature, and formation evolution data, the shale oil accumulation period information of the target area is determined; based on the shale oil accumulation period information and the spatial distribution characteristics of the equivalent maturity and abundance parameters, the identification results of shale oil enrichment areas within the target area are determined, thereby significantly improving the accuracy of shale oil enrichment area identification results and effectively reducing the ambiguity of the identification results.

Embodiments of the present application relate to the application of thermal methods to test or analyze materials, and in particular to a method for estimating the precipitation temperature of pitchblende in granite-type low-temperature hydrothermal uranium deposits, which can include the following steps: S10: collecting vein ore samples containing primary pitchblende veins in the survey area; S20: processing the vein ore samples to obtain calcite single mineral samples and fluorite single mineral samples; S30: analyzing the calcite single mineral and fluorite single mineral samples to determine the carbon isotope composition of the calcite single mineral samples and the carbon isotope composition of the fluid inclusions in the fluorite single mineral samples; S40: determining the carbon isotope equilibrium temperature according to the carbon isotope composition; S50: determining the precipitation temperature of pitchblende in granite-type low-temperature hydrothermal uranium deposits according to the carbon isotope equilibrium temperature. The method provided by the embodiments of the present application can determine the precipitation temperature of pitchblende through the carbon isotope composition of the coeval calcite and fluorite, and the determined precipitation temperature is accurate and reliable.

The invention provides a quartz fluid inclusion automatic detection method and device based on a YOLOv8 algorithm, and belongs to the technical field of inclusion detection. According to the method, the fluid inclusion in the to-be-detected quartz microscopic image is automatically detected through the inclusion detection model trained by the YOLOv8 model added with the coordinate attention module and the small target detection layer, the process is time-saving and labor-saving, the accuracy is relatively high, and the research on the mineral formation process is facilitated.

This invention discloses a method for removing fluid inclusions from vein quartz sand by flotation. The method includes the following steps: crushing and grinding the vein quartz to produce quartz sand with a particle size of -0.2 to +0.106 mm, and drying it for later use; performing a first flotation on the dried quartz sand to remove mica, obtaining a primary concentrate; washing the primary concentrate multiple times and drying it for later use; taking the dried primary concentrate for a second flotation, adding at least one of calcium and magnesium salts and sodium oleate, maintaining the pH of the system at 8-11 during the flotation process; after the flotation is completed, collecting the flotation froth, removing the froth, and obtaining quartz sand with fluid inclusions removed. This invention, through the control of flotation reagents, selects quartz particles containing a large number of fluid inclusions as gangue minerals, thereby changing the quartz particles in the quartz concentrate and reducing the fluid inclusion content in the concentrate to a greater extent.

This invention discloses a method, equipment, and medium for analyzing the occurrence state and genetic genesis of rubidium in the Shimen rubidium deposit, belonging to the field of ore genetic analysis technology. The method includes: identifying structurally anomalous samples by calculating the deviation between theoretical and measured structural parameters; distinguishing between first-strain mode samples and second-strain mode samples based on the divergence characteristics of strain spatial distribution; determining the first type of rubidium occurrence layer and the first type of enrichment mechanism by utilizing the spatial lag relationship between isotope fractionation peak positions and strain peak positions; determining the second type of rubidium occurrence layer and the second type of enrichment mechanism by identifying the abrupt changes in rubidium concentration gradient around fluid inclusions; and delineating the mineralized region by coupling the enrichment direction at the sample scale with fracture structures or permeable strata. This invention achieves quantitative determination of the lattice position of rubidium occurrence, differentiation of the kinetic processes of mineralization mechanisms, and delineation of the geological structural constraints of mineralized regions.