68 results about "Coal oil" patented technology

The invention discloses an integrated closed circulation system for an RBCC engine, and solves the problems that a constant-pressure extrusion mode of an existing RBCC engine propellant supply system is not suitable for variable working condition adjustment of an RBCC rocket thrust chamber, and a high-pressure storage tank is huge in structure, large in weight and not beneficial to application and expansion of the system on the day. According to the system, high-temperature oxygen is generated through catalytic decomposition of hydrogen peroxide and acts on the turbine, then the hydrogen peroxide pump and the coal oil pump are driven to work, integrated pressurization, supply and adjustment of propellants can be carried out on the multiple rocket thrust chambers and the ramjet combustion chamber at the same time, and therefore wide-range fuel oil adjustment is met, and a widely-applied electric pump system can be replaced; and the structural envelope and weight are greatly reduced, so that the power requirement of a longer voyage is met.

The invention discloses a low-rank coal composite flotation reagent and a preparation method and application thereof, and belongs to the technical field of coal flotation of mineral processing. The agent specifically comprises a composite collecting agent and a composite foaming agent, and the composite collecting agent comprises kerosene, n-dodecane, oleic acid, dimer acid, sodium stearate, terpilenol, diethyl phthalate, alkylphenol ethoxylates, span-80, trioctyl phosphate and 2-ethylhexanol. The composite foaming agent is prepared from the following components: terpilenol, terpenic oil, sec-octyl alcohol and sodium alpha-olefin sulfonate. Compared with a traditional single flotation reagent combination, the composite flotation reagent has a remarkable effect in fine coal flotation, and particularly when coal with the particle size smaller than 0.5 mm is treated, the flotation efficiency, the clean coal yield and the combustible body recovery rate can be effectively improved. More importantly, the medicament is stable at normal temperature, the layering phenomenon is avoided, the long-term effectiveness is ensured, and the medicament has extremely high industrial application potential.

An in-situ large-area drilling and furnace construction method for coal gasification and co-mining of kerosene and / or coalbed methane is provided, which includes: constructing an injection well to the target coal seam and then constructing a horizontal well to divide the target coal seam into sections of coal; extracting coalbed methane; transforming the horizontal wells on both sides of the coal in the first section of coal into coal gasification production wells, and dividing them into intake and exhaust channels; constructing ventilation boreholes to form a “honeycomb shaped” gasifier, which ignites and gasifies to promote the production of combined gases from combustion; after the combustion of first section of coal is completed, continuing to construct the next section of coal and drill holes between adjacent horizontal wells to achieve continuous coal seam combustion and gasification. The method of the present disclosure can improve combustion efficiency and increase kerosene extraction efficiency.

The invention belongs to the technical field of fuel oil, and particularly relates to hydrogen energy engine fuel oil taking coal-to-oil as a base material and a preparation method of the hydrogen energy engine fuel oil. Comprising the following components: 35-45 parts of coal-based Fischer-Tropsch synthesis crude liquid wax, 5-15 parts of white oil, 2-8 parts of heavy wax, 15-25 parts of hydrogenated anthracene oil, 2-8 parts of fatty acid methyl ester, 15-25 parts of hydrogenated coal diesel oil and 1-5 parts of an additive. The preparation method comprises the following steps: S1, weighing the raw materials according to the proportion of the fuel oil of the hydrogen energy engine; and S2, adding the raw materials into a stirring container, and uniformly stirring to obtain the hydrogen energy engine fuel oil. The fuel oil does not belong to dangerous chemicals, the ignition performance of the fuel oil is superior to that of current national 6 diesel oil, the terminal sale price of the fuel oil is lower than that of the diesel oil, and market requirements are met.

The present invention relates to the field of direct coal liquefaction, and discloses a catalytic coal-oil slurry and its preparation method, method of direct coal liquefaction, and use. The method includes mixing an oil-soluble molybdenum source, a solvent, pulverized coal, and an optional sulfur source to obtain the catalytic coal-oil slurry. When the catalytic coal-oil slurry is used for direct coal liquefaction, it can achieve a higher oil yield and reduce the production cost.

The invention relates to the technical field of carbon dioxide oil displacement, in particular to a carbon dioxide oil displacement and gas displacement sealing device for a coal-oil-gas symbiotic area. The gas injection assembly is arranged above the base; the storage tank is fixedly arranged at the top of the base, and the gas inlet end of the gas injection assembly communicates with the interior of the storage tank; the conveying pipe is arranged above the base, and the gas outlet end of the gas injection assembly communicates with the interior of the conveying pipe; and the position adjusting assembly is arranged above the base, and the output end of the position adjusting assembly is connected with the conveying pipe. When the device is used, the device is moved to a designated place through the base, the gas injection assembly can pump carbon dioxide in the storage tank into the conveying pipe, the conveying pipe discharges the carbon dioxide into the ground, and oil type gas, methane and coal bed gas can be pumped to the ground. The position adjusting assembly can drive the conveying pipe to move in the vertical direction, the position of the conveying pipe in the vertical direction can be freely changed, the conveying pipe automatically moves upwards again, and carbon dioxide is discharged at a specific accurate position.

This invention relates to the field of coal washing and beneficiation technology, and discloses a method for preparing a nano-flotation reagent for coarse coal slime. The method involves mixing sulfonated fatty acid methyl ester with kerosene and n-octanol to form an oil phase, then further mixing this with an aqueous phase containing a nonionic emulsifier, and adding functionalized nano-silica to obtain a mixed solution. This mixed solution is then sequentially treated by ultrasonic dispersion, high-speed stirring, and micro-electrolysis to generate nano / microbubbles in situ and maintain their uniform distribution, resulting in a nano-microemulsion. This invention can significantly improve the adhesion efficiency and loading capacity of coarse coal surfaces, effectively suppress tailings runoff, and improve the transportation and collection efficiency of coarse coal. It solves the problems of low clean coal yield and tailings runoff caused by the low adsorption efficiency and poor foam stability of traditional flotation reagents for coarse coal.

The invention relates to the field of coal chemical industry, and discloses a preparation method of coal-based rocket kerosene, which comprises the following steps: mixing a coal indirect liquefaction Fischer-Tropsch synthesis fraction and a coal direct liquefaction fraction, carrying out a deep hydrofining reaction, fractionating, and taking fractions with an initial boiling point of 185-205 DEG C and a final boiling point of 245-265 DEG C to obtain the coal-based rocket kerosene, wherein the mass ratio of the indirect coal liquefaction Fischer-Tropsch synthesis fraction to the direct coal liquefaction fraction is (20 to 40): (80 to 60); the initial boiling point of the indirect coal liquefaction Fischer-Tropsch synthesis fraction is 150-170 DEG C, the final boiling point of the indirect coal liquefaction Fischer-Tropsch synthesis fraction is 290-310 DEG C, the initial boiling point of the direct coal liquefaction fraction is 160-180 DEG C, and the final boiling point of the direct coal liquefaction fraction is 300-320 DEG C.

The utility model relates to the technical field of coal oil pumps, and discloses a coal oil pump device with an air valve, which comprises a shell, an oil pumping pipe assembly is arranged on the shell, the oil pumping pipe assembly comprises an oil suction pipe and an oil outlet pipe, a channel for communicating the oil suction pipe with the oil outlet pipe is arranged on the shell, an electric pump is arranged in the oil suction pipe, and a threaded cover is arranged on the shell. The threaded cover is used for being in threaded connection with an external oil storage container, the oil suction pipe is arranged on the inner side of the threaded cover, a cavity is formed in the inner side of the threaded cover, the shell comprises an inner cavity communicated with the outside, the shell is provided with a one-way communicated air valve, and the air valve is communicated from the inner cavity to the cavity. According to the coal oil pump device with the air valve, the air valve is simple in structure and low in production cost; and external air can be sucked through the air valve when negative pressure is generated in the oil storage container, so that the negative pressure in the oil storage container is balanced, subsequent smooth extraction of kerosene is guaranteed, the oil extraction efficiency is high, and the use experience is good.

The invention provides a testing method for determining a shale oil rock core plaster ratio. The testing method comprises the following steps: acquiring a rock core for an experiment; calculating the diameter, length and gas permeability of the rock core; performing a nuclear magnetic resonance test to obtain a nuclear magnetic resonance T2 spectrum of the dry rock core, a substrate signal of the dry rock core and a nuclear magnetic resonance T2 spectrum of the saturated kerosene rock core; according to the nuclear magnetic resonance T2 spectrum of the dry rock core, the substrate signal of the dry rock core and the nuclear magnetic resonance T2 spectrum of the saturated kerosene rock core, the semaphore and the mortar ratio of fluid in the grey texture layer are calculated. Errors of experimental results caused by organic matter signals in the dry rock core are avoided, the characteristics of the dry rock core are fully utilized as the basis for dividing argillaceous pores and grey texture layers, and the experimental results are more accurate.

The invention discloses a method for preparing high-density coal-based jet fuel by taking fluorene and benzaldehyde as raw materials. The method comprises the following specific steps: 1, reacting a fluorene compound with benzaldehyde under the catalysis of alkali to generate a compound with a tetracyclic structure; and 2, dissolving the compound with the tetracyclic structure in an alkane solvent, and carrying out hydrogenation in a hydrogenation kettle or a fixed bed under the action of a metal catalyst to generate the high-density coal-based jet fuel. The high-density coal-based jet fuel can be completely prepared from the fluorene compound and benzaldehyde extracted from coal tar components in a high-yield mode through a two-step method, the density of the high-density coal-based jet fuel is larger than 0.90 g / cm < 3 >, and the high-density coal-based jet fuel is an aviation kerosene alkane compound with excellent performance; according to the whole route, the coal base is used as the raw material, the raw material source is wide, the cost is low, industrial production is more facilitated, and high-end and high-value coal products are achieved.

The invention discloses a method and a system for producing environment-friendly solvent oil by hydrogenation of coal-based light liquefied oil. The system comprises a residual oil and coal co-hydrogenation hydrocracking unit and a fixed bed hydrofining unit, the residual oil and coal co-hydrogenation hydrocracking unit is used for preparing oil-coal slurry by mixing coal and heavy oil, and preparing light liquefied oil through a suspended bed or fluidized bed hydrogenation device; and the fixed bed hydrofining unit is used for carrying out hydrodesulfurization, denitrification, demetallization and aromatic hydrocarbon saturation on light liquefied oil generated by the suspended bed hydrogenation device. The environment-friendly solvent naphtha is produced through co-hydrogenation of coal and heavy oil, solvent naphtha production raw materials are widened, the downstream market of kerosene co-processing products is enriched, the added value of the kerosene co-processing products is increased, and meanwhile compared with direct coal liquefaction, the method has the advantages of being high in production efficiency, lower in energy consumption, low in aromatic hydrocarbon content of the products and excellent in product performance.

The invention relates to the technical field of coal chemical industry, and discloses aerospace kerosene component oil and a preparation method thereof. The method comprises the following steps: (1) heating coal-based Fischer-Tropsch wax to 60-140 DEG C, conveying the heated coal-based Fischer-Tropsch wax to a reactor loaded with an isomerization catalyst, pressurizing hydrogen to 2.5-10 MPa, injecting the pressurized hydrogen into the reactor, and carrying out hydrocracking; (2) carrying out gas-liquid separation on the hydrocracking product, conveying the separated liquid-phase component into a normal-pressure rectifying tower for normal-pressure rectification, and cutting out an aviation kerosene fraction or an aerospace kerosene fraction from the middle of the tower; (3) heavy components cut out from the bottom of the normal-pressure rectifying tower continue to enter a reduced-pressure rectifying tower to be subjected to reduced-pressure rectifying, and a lubricating oil base oil fraction is cut out from the middle of the tower. The aviation and aerospace kerosene component oil prepared by the method can well meet the requirements of cold regions and high-altitude flight on oil fluidity.

This invention discloses a low-temperature resistant composite flotation reagent for coal preparation and its preparation method, specifically relating to the field of flotation technology. The reagent is formed by emulsification of a composite collector, a composite frother, and an aqueous phase. The composite collector contains kerosene, n-dodecane, oleic acid, dimer acid, surfactant components, and low-temperature stabilizing components. The composite frother contains terpineol, pine oil, sec-octanol, and sodium α-olefin sulfonate, etc. Through compounding and synergistic effects, high-speed shear emulsification, and high-pressure homogenization, the obtained reagent exhibits good dispersibility and stability at -5 to 15°C, and can improve the flotation efficiency, clean coal yield, and combustible gas recovery rate of fine coal slime and high-ash, difficult-to-separate coal slime without heating the coal slurry.

This invention discloses a method for preparing high-density coal-based jet fuel. The specific steps are as follows: First, indene and a phenol-containing raw material react under the catalysis of an acidic catalyst to generate a compound with a tricyclic structure; second, the compound with the tricyclic structure is hydrogenated in a hydrogenation reactor or fixed bed under the action of a metal catalyst to generate high-density coal-based jet fuel. The phenol-containing raw material 2 is one of phenol, o-methylphenol, p-methylphenol, m-methylphenol, phenol oil, or crude phenol. This invention, through a two-step method, can completely achieve the high-yield preparation of high-density coal-based jet fuel from indene and phenol-containing raw materials extracted from high-temperature coal tar components. The fuel has a density greater than 0.90 g / mL and is a high-performance aviation kerosene alkane compound. The entire route uses coal tar components (crude phenol / phenol oil, etc.) as raw materials, making it a route with widely available and low-cost raw materials, more conducive to industrial production.

The invention provides an oil product improving method based on catalytic pyrolysis of oil-rich coal from modified blast furnace slag, and belongs to the technical field of quality improvement of oil-rich kerosene. Aiming at the problems of low coal pyrolysis tar yield, high heavy fraction content and the like in the prior art, the method comprises the following steps: 1) modifying original blast furnace slag through an oxide; 2) mixing the modified blast furnace slag with oil-rich coal in proportion, performing catalytic pyrolysis, and collecting coal tar subjected to catalytic pyrolysis; 3) extracting and analyzing each fraction component in the coal tar; and 4) obtaining the yield and parameter conditions of the light tar. According to the method, CaO is the optimal modified oxide of the blast furnace slag through a single factor analysis method, meanwhile, it is verified that 15.12% of coal tar can be generated through catalytic pyrolysis of the oil-rich coal with the CaO modified blast furnace slag with the content of 5%, the carbolic oil content in the coal tar reaches 97.72%, and the promotion effect on oil product improvement of the oil-rich coal is achieved.

The invention discloses an underground liquid storage tank and a construction method thereof. The underground liquid storage tank is provided with an underground diaphragm wall outer tank wall (1), and a lining tank wall (2), a tank bottom plate (3) and a tank top plate (4) are arranged in an area defined by the underground diaphragm wall outer tank wall. A stand column (5) is arranged between the tank bottom plate and the tank top plate, and the storage tank is provided with a working well (6). The underground diaphragm wall outer tank wall, the lining tank wall, the tank bottom plate, the tank top plate and the stand columns are all made of reinforced concrete, and the working well is made of reinforced concrete or steel. The surfaces, making contact with liquid stored in the inner cavity of the underground liquid storage tank or vapor volatilized by the liquid, of the lining tank wall, the tank bottom plate, the tank top plate, the stand columns and the working well are provided with anti-corrosion and anti-seepage layers (8), and a sealing system is arranged above the tank top plate. The invention discloses a construction method of an underground liquid storage tank. The underground liquid storage tank can be used for storing crude oil and can also be used for storing gasoline, kerosene, diesel oil, liquid chemicals and the like.

The invention discloses an asymmetric Gemini quaternary ammonium salt compound collecting agent and a preparation method and application thereof, and belongs to the technical field of coal flotation. The asymmetric Gemini quaternary ammonium salt compound type collecting agent comprises the following components: 600 to 800 [mu] L of kerosene, 0.05 to 0.2 g of asymmetric Gemini quaternary ammonium salt, 40 to 60 g of water, and 10 to 50 [mu] L of methyl isobutyl carbinol. According to the asymmetric Gemini quaternary ammonium salt compound collecting agent, the synergistic flotation effect is achieved through agent combination, the surface property of fine-grain low-rank coal can be effectively improved, and the flotation recovery rate is increased. The asymmetric Gemini quaternary ammonium salt compound collecting agent is easy to prepare and convenient to use, and meanwhile the defects that traditional diesel oil and kerosene collecting agents are large in agent consumption, high in environmental pollution risk, low in carbon recovery rate and the like are overcome.

The invention belongs to the technical field of oil and gas reservoir development physical simulation, and relates to an experimental device and method for simulating shale fan-shaped well pattern optimization in a high-temperature and high-pressure environment, and the experimental device comprises a high-temperature and high-pressure bin, a heterogeneous semi-cylinder model, a fan-shaped well pattern, a fluid injection assembly, a saturation and pressure monitoring assembly and a temperature control assembly. According to the device, coal oil is pumped into a high-temperature and high-pressure bin through a fluid injection assembly to achieve a high-pressure environment, a fan-shaped well pattern is arranged on a heterogeneous semi-cylinder model, cracks are formed in a horizontal well section, and fluid is injected through a central vertical well section; data are collected in real time through the saturation and pressure monitoring assembly, the high-temperature and high-pressure stratum environment is simulated in combination with the temperature control assembly, and therefore the fan-shaped well pattern spacing, the horizontal section length and the crack number are optimized. According to the invention, the fluid migration rule of the shale reservoir under the complex well pattern structure can be effectively simulated, and an optimization design basis is provided for shale gas development.

The invention develops an efficient inert titanium slag recovery process. Titanium and coal resources are synchronously recovered by adopting a flotation-reselection combined technology. The method comprises the following steps: mixing inert titanium slag to prepare ore pulp D, mixing the ore pulp D with diesel oil / kerosene and a combined reagent, and separating coal concentrate F through a flotation column; screening the tailings E, and roughing through a centrifugal jigger to obtain titanium concentrate J; and the residual tailings are scavenged by a suspended vibration conical surface concentrating machine to produce titanium concentrate K, recyclable middlings L and standard tailings M. Concentrate is concentrated, filtered and stored, and middling L and return water are subjected to closed-loop cyclic utilization. The process is integrated with an intelligent control system, efficient and comprehensive utilization of inert titanium slag resources is achieved, solid waste emission meets the environmental protection standard, the water resource recycling rate reaches 95% or above, remarkable economic benefits and environmental benefits are achieved, and a green solution is provided for titanium slag recycling.

The invention discloses a cutin structure-based oil-rich coal oil content evaluation method, and relates to the technical field of mineral resource exploration, and the cutin structure-based oil-rich coal oil content evaluation method mainly comprises the following steps: preparing a sample to be detected into a coal polished section, and screening the coal polished section by using a microscope observation method to obtain an available sample; obtaining cutin structure parameters according to the available sample, wherein the cutin structure parameters comprise a structure integrity index, a fluorescence intensity mean value and a pore area percentage; and obtaining a sample oil content distribution interval according to the cutin structure parameters, and averaging the oil content of data points in the sample oil content distribution interval to obtain the oil content of the sample. By implementing the method for evaluating the oil content of the oil-rich coal based on the cutin structure, provided by the invention, the oil content of the oil-rich coal can be quickly evaluated with low cost, no damage and no pollution.

The present application relates to a kind of lignite oil coupling large coal-fired boiler power generation process system, belong to coal energy technical field.The present application is to solve the problem of low overall economic benefit in the process of lignite dry distillation for increasing the yield of coal gas and tar, the energy consumption of required pressurization and heating makes.The present application includes lignite oil sub-system and lignite boiler power generation subsystem;Lignite oil sub-system uses lignite as raw material to prepare kerosene and coal gas, lignite boiler power generation subsystem uses lignite, semi-coke generated by lignite oil sub-system and limestone as raw material for combustion power generation;Lignite oil sub-system and lignite boiler power generation subsystem produce coupling effect through double-helix pyrolysis furnace, screw feeder, back material valve, combustion chamber, cyclone separator and boiler back material pipe, lignite oil sub-system provides semi-coke for lignite boiler power generation subsystem, and lignite boiler power generation subsystem provides high-temperature circulating ash for lignite oil sub-system.The present application is mainly used for preparing kerosene, coal gas and power generation.

The invention discloses a method and a device for acquiring a power generation carbon emission coefficient in the power industry, and belongs to the technical field of carbon emission accounting and analysis in the power industry. According to the method, the electric power carbon emission accounting range is determined according to the characteristics of the electric power industry; furthermore, the generating capacity data and the energy consumption data of the power industry are collected in a defined range, and energy sources comprise raw coal, coke, crude oil, fuel oil, gasoline, kerosene, diesel oil, liquefied petroleum gas, refinery dry gas and the like; calculating the carbon emission generated by energy consumption in the power production process of the power industry by using a carbon emission coefficient method; and finally, the power generation carbon emission coefficient is calculated and analyzed, so that the carbon emission condition of the regional power industry can be known more conveniently, the carbon emission characteristics of the power industry can be researched, support is provided for making a low-carbon development strategy, and energy conservation and consumption reduction of thermal power generation in the region can be promoted.

The invention provides a fluidized bed coal tar hydrotreating method, which comprises the following steps: mixing a coal tar raw material with hydrogen, sequentially passing through a first fluidized bed hydrogenation reaction zone and a second fluidized bed hydrogenation reaction zone, filling a hydrogenation catalyst A in the first fluidized bed hydrogenation reaction zone, filling a hydrogenation catalyst B in the second fluidized bed hydrogenation reaction zone, separating the reaction effluent to obtain naphtha, diesel oil and aviation kerosene; wherein the bulk carbon content of the hydrogenation catalyst A is 5-20wt% higher than that of the hydrogenation catalyst B; the average pore size of the hydrogenation catalyst A is 5-15nm higher than that of the hydrogenation catalyst B; the total acid content of the hydrogenation catalyst A is 0.10-0.30 mmol / g lower than the total acid content of the hydrogenation catalyst B. The method can reduce the crushing of the catalyst and ensure the stable long-period operation of the device, and is especially suitable for the hydrotreating process of coal tar with high oxygen content; according to the method, hydrogenation reaction of the coal tar under the condition of high conversion rate can be realized, and meanwhile, the product quality and yield are improved.

The invention belongs to the technical field of oil and gas field development, and discloses a nuclear magnetic resonance-based shale oil energy supplement new mode indoor experiment evaluation method, which comprises the following steps: S1, rock sample pretreatment; s2, vacuumizing and pressurizing the rock sample to saturate heavy water; s3, displacement of saturated heavy water by kerosene; s4, displacing kerosene with in-situ crude oil; s5, simulating depletion type development, and calculating the crude oil recovery rate of the depletion type development rock sample; s6, a chemical agent is injected for temporary plugging; and S7, simulating CO2 injection and nano-agent energy supplement development under different injection pressures and different throughput rounds, and calculating the crude oil recovery rate of the rock sample after energy supplement under different injection pressures and different throughput rounds. According to the indoor evaluation experiment method for the novel energy supplement development mode under chemical agent plugging, nano agent flooding and CO2 huff and puff, the problems of CO2 injection and liquid channeling and the problem that the oil yield is rapidly decreased cycle by cycle in the single CO2 injection huff and puff or gas-water alternate injection stage can be solved, mine field practice is guided, and efficient shale oil development is achieved.

The utility model provides a coal dry distillation power generation and green coal synthesis integrated system. The system comprises a coal dry distillation module, an oxygen-fuel combustion power generation module, a hydrogen and oxygen production module and a green coal oil gas synthesis module. The coal dry distillation module is used for dry distillation of coal and can generate low-temperature dry distillation oil gas, medium-high-temperature coal gas, high-temperature coal tar and semicoke. Hydrogen generated by the coal dry distillation module and the hydrogen and oxygen production module is configured to be conveyed to the green coal oil gas synthesis module, and CO2 generated by the coal dry distillation module and the oxygen-fuel combustion power generation module is configured to be conveyed to the green coal oil gas synthesis module. Low-temperature dry distillation oil gas and semicoke generated by the coal dry distillation module, oxygen generated by the hydrogen and oxygen production module and coal gas generated by the green coal oil gas synthesis module are configured to be conveyed to the oxygen-fuel combustion power generation module, so that power is generated on the basis of oxygen-fuel combustion.

The invention relates to the technical field of coal mining, and provides an oil and gas well instability analysis method and system during coal and oil simultaneous mining. In the method, for an oil-gas well under a non-mining condition, when an actual weak plane inclination angle beta of a rock stratum of the oil-gas well is greater than a critical weak plane inclination angle of the rock stratum of the oil-gas well, a limit horizontal stress sigma 1, sigma 2, sigma 3, sigma 4, sigma 5, sigma 6, sigma 7, sigma 8, sigma 8, sigma 8, sigma 8, sigma 8, sigma 8, sigma 8, sigma 8, sigma 8, sigma 8, sigma 8, sigma 8, sigma 8, sigma 8, sigma 8, sigma 8 comparing with the actually measured horizontal stress sigma '1 in the rock stratum of the oil-gas well, and judging the instability of the oil-gas well according to the comparison result; and for an oil and gas well under the mining condition, the stability of the oil and gas well is evaluated according to the constructed oil and gas well instability judgment model under the mining condition, so that the stability of the gas well is evaluated by analyzing the influence of weak plane cohesion on mechanical behaviors of a rock stratum under the biaxial and triaxial stress conditions. And guidance is provided for oil-gas well stability prediction and evaluation and oil-gas well drilling design under the condition of simultaneous production of kerosene and oil.

The invention relates to the technical field of oil exploration, and discloses an inter-coal oil-bearing reservoir prediction method and device, a medium and computing equipment. The method comprises the steps that single well curve characteristic analysis is carried out, qualitative analysis is carried out on curves of sound waves, resistivity, porosity and natural potential, and the characteristics of the oil-bearing reservoir are determined; carrying out quantitative analysis on the density and the gamma curve, and carrying out curve fitting; the fitted curve is optimized, and the influence of the coal seam is eliminated; establishing a favorable reservoir indication curve and a sound wave time difference cross plot, carrying out quantitative analysis on the oil-bearing reservoir, and dividing the interval of the oil-bearing reservoir to distinguish the oil-bearing reservoir; well-seismic calibration is carried out, and a coal seam oil-bearing reservoir removal initial model is established based on the favorable reservoir indication curve; and based on the coal seam-removed oil-bearing reservoir initial model, carrying out oil-bearing reservoir prediction, and drawing an oil-bearing reservoir planar graph and an oil-bearing reservoir profile graph. According to the method, the influence of the coal seam is eliminated, the applicability to the oil-containing reservoir between the coal is improved, and the distribution condition of the oil-containing reservoir is conveniently and accurately predicted.

The utility model discloses an energy-saving composite material forming machine heated by heat conducting oil, which comprises a heat conducting plate, the heat conducting plate is arranged on an upper pressing die and a lower pressing die of the forming machine, a plurality of oil channels are arranged in the heat conducting plate, electric heating pipes are arranged in the oil channels, the oil channels are connected with an oil inlet pipe and an oil outlet pipe, and the oil outlet pipe is connected with a hot coal oil pump. The other end of the hot coal oil pump is connected with an oil inlet pipe, the diameter of the oil inlet pipe is larger than that of the oil outlet pipe, and the oil inlet pipe and the oil return pipe are connected with a heat-conducting oil gathering pipe which is connected with an expansion groove. Oil in the expansion tank is preliminarily heated through the heating device, after the oil reaches the preset temperature, the oil in the expansion tank is pumped into the oil outlet pipe from the oil inlet pipe through the hot coal oil pump, and the diameter of the oil inlet pipe is larger than that of the oil outlet pipe, so that the oil pipe becomes smaller, the oil pressure is increased, and air residues in the oil pipe are reduced; the heat conduction plate is filled with hot oil rapidly, the heat conduction efficiency of the hot oil is improved, and heat conduction is more balanced.

The invention provides a co-hydrotreating system and a co-hydrotreating method for direct coal liquefaction oil and bio-based oil. The system comprises a hydrogenation unit, a first separation unit, a co-hydrogenation treatment device and a second separation unit, the hydrogenation unit comprises a hydrofining device, a hydroisomerization device and a hydrogenation saturation device, and is used for sequentially carrying out hydrofining reaction, hydroisomerization reaction and hydrogenation saturation reaction on the direct coal liquefaction oil and hydrogen under the catalysis of a catalyst to obtain a product system; the first separation unit is used for separating a product system to obtain first naphtha, first aviation kerosene, diesel oil and transformer oil; the co-hydrogenation treatment device is used for carrying out co-hydrogenation reaction on the first naphtha and bio-based oil under the catalysis of a fourth catalyst to obtain an oil-water mixture; and the second separation unit is used for separating the oil-water mixture to obtain second naphtha, gasoline, light aromatic hydrocarbon and second aviation kerosene. By applying the system, the synergistic conversion of the direct coal liquefaction oil product and the bio-based oil can be realized.