17 results about "Silicic" patented technology

The application provides a method for judging ancient marine water body environment. The method comprises the following steps: obtaining a target shale reservoir core sample in a work area; wherein the target shale reservoir is radiolarian siliceous shale lamina; determining the composition of the shell cavity filling and the filling amount of calcite in the shell cavity in the target shale reservoir based on the target shale reservoir core sample; and determining the ancient marine water body environment during the deposition period of the target shale reservoir in the work area according to the composition of the shell cavity filling and the filling amount of calcite in the shell cavity in the target shale reservoir. The method for judging ancient marine water body environment can effectively combine the oxidation-reduction state of the ancient marine deep water body and the precipitation and dissolution conditions of calcite, so as to better promote the reconstruction of the ancient marine environment.

The invention provides a MgO-Al2O3-SiO2 ternary component tundish covering agent and a preparation method and application thereof.The tundish covering agent is composed of a base material and auxiliary materials, the base material is siliceous minerals, and the auxiliary materials comprise expansible minerals and melting point adjusting minerals; the preparation method comprises the following steps that siliceous minerals, expansible minerals and melting point adjusting minerals are crushed and screened, and siliceous mineral particles, expansible mineral particles and melting point adjusting mineral particles are obtained respectively; and the siliceous mineral particles, the expansible mineral particles and the melting point adjusting mineral particles are matched, mixed to be uniform and dried, and the MgO-Al2O3-SiO2 ternary component tundish covering agent is obtained. The tundish covering agent prepared by the invention is good in heat preservation and covering effects, low in cost, simple in preparation process, not easy to crack during slagging-off and high in adhesion to non-metallic inclusions.

The application provides a method for judging whether siliceous shale is hydrochemical deposition. The method comprises the following steps: determining whether the target siliceous shale has characteristics 1, 2, 3 and 4, and if yes, the target siliceous shale is hydrochemical deposition; characteristic 1: biogenic silica accounts for 70-95% of the total volume of quartz and terrigenous feldspar in the rock, and terrigenous quartz and terrigenous feldspar account for 5-30% of the total volume of quartz and terrigenous feldspar in the rock; characteristic 2: containing calcite and dolomite; characteristic 3: containing ordinary framboidal pyrite, and the ordinary framboidal pyrite refers to framboidal pyrite with intercrystalline pore organic matter; characteristic 4: containing organic clay complex with honeycomb nanopores. Judging whether siliceous shale is hydrochemical deposition helps to determine the shale gas sweet spot of siliceous shale, so as to realize efficient exploration and development of shale gas of siliceous shale.

The application discloses a kind of tight sandstone reservoir pore quantitative evolution calculation method of crack not development, including obtaining the relevant data of the quantitative evolution calculation of pore in research area;The quantitative parameter related to pore evolution is counted by the relevant data;According to the relevant data, the reservoir diagenetic stage analysis, main diagenesis type and diagenetic evolution sequence of different diagenesis are determined;According to quantitative parameter, initial porosity is calculated;The total porosity lost by compaction is calculated;The total porosity lost by calcareous, siliceous and clay cementation is calculated;The total porosity increased by dissolution is calculated;The total amount of transformation of kaolinite late transformation is calculated;With reservoir diagenetic evolution sequence, burial history and oil and gas charging period as constraint, the size of reservoir porosity at different depths is calculated.The method of the application can better analyze the pore evolution process of deep tight sandstone reservoir with large burial depth, poor physical property and complex diagenesis.

The invention relates to the technical field of mineral extraction, particularly discloses a method for efficiently extracting barite single mineral in black mudstone rich in organic matters, and solves the technical problems that micron-sized barite in black mudstone cannot be efficiently extracted in the prior art, lattice destruction / isotope fractionation of barite is easily caused in the extraction process, the purity and the recovery rate are low and the like. The purity of the extracted barite single mineral is larger than or equal to 99%, the recovery rate of fine-fraction barite is larger than or equal to 90%, crystal lattices are complete and free of damage, isotope fractionation and component change are avoided, and the high-precision geochemical test requirement can be met; meanwhile, the method is suitable for various sedimentary rocks such as marine / continental black mudstone, shale and siliceous mudstone, and the applicability is wide.

The application relates to a method for analyzing a geological body by means of physical and chemical properties of the geological body, and particularly relates to a method for determining a hydrothermal uranium ore prospective area, which comprises the following steps: determining a first region in an exploration area, the first region being a region in which at least one element group corresponding to an abnormal region is distributed; determining a second region in the exploration area, the second region being a region in which a metallogenic siliceous vein is located; determining a third region in the exploration area, the third region being a region in which the content of uranium in surface rock in the exploration area is greater than a preset value, and a marker in the surface rock simultaneously exists rigid deformation and plastic deformation; and determining the hydrothermal uranium ore prospective area based on one or more of the first region, the second region and the third region.

The invention provides a method for judging an ancient ocean water body environment. The method comprises the following steps: acquiring a core sample of a target shale reservoir in a work area; wherein the target shale reservoir is a radioactive insect siliceous shale formation; based on the core sample of the target shale reservoir, determining the composition of a silicon shell cavity filler in the target shale reservoir and the filling amount of calcite in a silicon shell cavity; and according to the composition of the silicon shell cavity filler in the target shale reservoir and the filling amount of the calcite in the silicon shell cavity, determining the ancient ocean water body environment of the target shale reservoir in the work area in the deposition period. According to the method for judging the ancient ocean water body environment, the oxidation-reduction state of the ancient ocean deepwater body and the precipitation and dissolution conditions of calcite can be effectively combined, so that the reconstruction of the ancient ocean environment is better promoted.

This invention provides a method for predicting vertical sweet spots in high-silica shale, comprising the following steps: S1, collecting shale core samples and obtaining measured experimental data and well logging data of the shale; wherein the measured experimental data of the shale includes measured TOC, NMR porosity, and relative content of silica minerals; S2, establishing the relationship between measured TOC, NMR porosity, and relative content of silica minerals, and determining the lower limits of relative content of silica minerals, TOC, and NMR porosity in the gas-producing section; S3, establishing a calculation model for the relative content of silica minerals in well logging; S4, determining the sweet spot section of the shale; S5, verifying the accuracy of the sweet spot section of the shale. This invention uses the relative content of silica minerals as the key parameter, which is simple and clear; the relative content of silica minerals is also the most important brittle mineral in shale. The higher the relative content of silica minerals, the better the brittleness of the shale, and the more conducive it is to fracturing. Therefore, the high silica content section is also the engineering sweet spot section. This method takes into account the prediction of both geological and engineering sweet spots.

The present application belongs to the field of palaeogeomorphology restoration, and particularly relates to a method and system for palaeogeomorphology restoration in a sedimentary period based on siliceous rock thickness, which specifically comprises the following steps: establishing a crossplot of a plurality of standardized logging curves and a siliceous rock content curve; screening a siliceous rock sensitive curve sensitive to siliceous content according to the crossplot; carrying out a curve fitting reconstruction identification experiment according to the siliceous rock sensitive curve to obtain a reconstructed curve; selecting an inversion method with the highest coincidence degree with the actual siliceous rock to perform inversion to obtain siliceous rock inversion data; converting time thickness into depth by using time-depth conversion to obtain a siliceous rock thickness planar distribution map; and optimizing the siliceous rock thickness planar distribution map to obtain a final three-dimensional palaeogeomorphology map. The method can successfully solve the problem of the tracking accuracy of conventional methods depending on specific stratigraphic combinations and seismic horizons, and breaks the limitation that if there is no continuous reflection interface above and below the target layer, the palaeogeomorphology of the target layer cannot be accurately restored.

Compositions, methods, and workflows for treating a siliceous geologic formation including flowing a treatment composition into the formation, wherein the treatment composition has a pH of about −1.0 to about 6.0 and includes an acid having molecular weight less than about 200 or an ammonium or sodium salt thereof, an HF source, and a precipitation prevention agent, and a transient modifier, and allowing the transient modifier to modify the permeability of the siliceous formation. The precipitation prevention agent may comprise a chelant or a scale inhibitor. The transient modifier may comprise surfactant, viscoelastic surfactant, a solid, hydrophobic material, an emulsion, a gas, or an energized fluid.

This invention provides a method for determining whether siliceous shale is a petrification product of deep-sea microbial mats. The method includes: determining whether the target siliceous shale possesses at least one of characteristics 1-3; if so, it is a petrification product of deep-sea microbial mats. Characteristic 1: A dominant rock microdomain of Class I, with Class II and III rock microdomains scattered within Class I; Characteristic 2: A rock skeleton composed of aggregates of porous micro- to nano-quartz particles, with organic matter rich in honeycomb nanopores distributed within the rock skeleton; Characteristic 3: A rock skeleton dominated by aggregates of porous micro- to nano-quartz particles, containing non-porous micron-sized quartz particles and a composite of porous nano-quartz particles and clay on its surface, exhibiting Class II rock microdomains. If the siliceous shale is a petrification product of deep-sea microbial mats, it indicates that the area where the siliceous shale is located is a shale gas sweet spot with high exploration and development potential.

The application provides a method for determining the genesis and sedimentary environment of siliceous rocks by using multi-index comprehensive analysis, relates to the technical field of geological exploration and geochemistry, and comprises the following steps: pretreating a siliceous rock sample to obtain a to-be-tested powder sample; testing the to-be-tested powder sample to obtain the content of corresponding elements; calculating and obtaining a genesis parameter for characterizing the genesis type of the siliceous rock, and then obtaining a genesis type determination result; calculating and obtaining an environment parameter for characterizing the sedimentary environment of the siliceous rock, and then obtaining a sedimentary environment determination result; and comprehensively analyzing and cross-verifying the determination results to form a final discrimination conclusion. The application can effectively distinguish hot water deposition, biological genesis and composite genesis siliceous rocks by comprehensively analyzing multiple indexes such as major elements, trace elements and rare earth elements, and combining multiple graphic cross-verifications, obviously reduces the multi-solution and subjectivity of traditional single-index discrimination, and accurately determines the sedimentary environment such as continental margin and ocean basin through element ratio and graphic analysis.

The present application relates to geothermal resource development material technical field, specifically to the temperature-resistant high-thermal-conductivity cementing slurry system suitable for geothermal well and its preparation method, the temperature-resistant high-thermal-conductivity cementing slurry system suitable for geothermal well includes by weight percentage: 38.0wt. %~63.5wt. % G-grade oil well cement, 15.0wt. % siliceous material, 10wt. %~15wt. % serpentine, 10wt. %~30wt. % temperature-resistant thermal conductive material, 0.5wt. % high-temperature stabilizer, 1wt. %~1.5wt. % high-temperature dispersant, and the percentage of the total mass of the above raw materials 3wt. %~5wt. % high-temperature fluid loss additive, 1wt. %~3wt. % high-temperature retarder, 0.25wt. % defoaming agent.The present application has the characteristics of strong high-temperature resistance, high thermal conductivity, good toughness, micro-expansion and gas channeling prevention.

Compositions, methods, and workflows for treating a siliceous geologic formation including flowing a treatment composition into the formation, wherein the treatment composition has a pH of about −1.0 to about 6.0 and includes an acid having molecular weight less than about 200 or an ammonium or sodium salt thereof, an HF source, and a precipitation prevention agent, and a transient modifier, and allowing the transient modifier to modify the permeability of the siliceous formation. The precipitation prevention agent may comprise a chelant or a scale inhibitor. The transient modifier may comprise surfactant, viscoelastic surfactant, a solid, hydrophobic material, an emulsion, a gas, or an energized fluid.

The invention discloses a method for preparing granite from inorganic salt solid-phase exothermic molten slag, and relates to the technical field of synthesis of inorganic non-metallic materials. Comprising the following raw materials: 55% of activated coal gangue, 25% of red mud, 8% of borax and 12% of quartz sand; the method comprises the following specific steps: mixing and crushing coal gangue, red mud, a boron-containing mineralizer and a siliceous correcting agent; triggering a solid-phase exothermic reaction at 700 DEG C to automatically heat the system to be more than or equal to 1150 DEG C; slag with the viscosity of 5-10 Pa.s is discharged through gravity phase splitting; and controlling the cooling rate to crystallize and cool the melt. The solid-phase exothermic reaction is used for self-energizing, so that external energy consumption is reduced; the triggering temperature is only 700 DEG C, and violent self-propagating heat release is realized through the design of a reaction system; and through a liquid deslagging mechanism, efficient separation of impurities and a target ore phase is achieved.

The present application provides a method for judging whether siliceous shale is deep water traction flow deposition. The method comprises: determining whether the target siliceous shale has characteristics 1, characteristics 2 and characteristics 3, if yes, the target siliceous shale is deep water traction flow deposition; wherein, characteristic 1: the main skeleton of the rock is composed of more than 45% of silt-sand grade porous quartz particles with a particle size of 4-400 μm; characteristic 2: the auxiliary skeleton of the rock is formed by more than 25% of the rock volume of the mud grade porous quartz particle aggregate with a particle size of less than 4 μm distributed between the main skeleton of the rock; characteristic 3: the porous organic matter and non-porous organic matter accounting for 8-15% of the rock volume are distributed between the rock skeleton including the main skeleton and the auxiliary skeleton of the rock. If the siliceous shale is deep water traction flow deposition, it indicates that the area where the siliceous shale is located is a shale gas sweet spot area with high exploration and development potential.

The application discloses a preparation method of a sample for a fracturing experiment of a paralic shale reservoir, and the method comprises the following steps: obtaining rock samples corresponding to various rock layers of the paralic shale reservoir, wherein the rock layers comprise dense sandstone layers, limestone layers, coal rock layers, carbonaceous shale layers and siliceous shale layers; obtaining core characteristics corresponding to the rock samples of the various rock layers, wherein the core characteristics comprise rock mechanical parameters, rock mineral components and rock particle sizes; determining simulation materials of the various rock layers except the coal rock layers based on the core characteristics, and collecting coal rock in the coal rock layer of the paralic shale reservoir as the simulation material of the coal rock layer; determining a target simulation material ratio of the various simulation materials based on the core characteristics, and preparing the sample for the fracturing experiment of the paralic shale reservoir by using the simulation materials and the target simulation material ratio. The technical scheme provided by the application can improve the feasibility of the fracturing experiment of the paralic shale reservoir.