11results about How to "Improve the mining effect" patented technology

The invention discloses a carbon dioxide pressure flooding oil displacement and burying numerical simulation technical system, and relates to the field of CCUS numerical simulation, and the technical system comprises a geological data obtaining module which obtains the geological data of a target oil field site; an oil reservoir geologic model construction module constructs an oil reservoir geologic model in the CO2 pressure drive process of the deep shale oil reservoir according to the geological data; the pressure-drive oil displacement and burying mathematical model building module is used for building a deep shale oil reservoir CO2 pressure-drive oil displacement and burying mathematical model on the basis of the multiphase multicomponent seepage model and the mechanical deformation model in combination with the reservoir damage mechanical constitutive model; and the pressure-drive oil displacement and burying numerical simulation module is used for solving the seepage equation and the mechanical equation, carrying out iterative coupling solution on the fluid-solid two fields based on a definite stress decomposition algorithm, carrying out deep shale oil reservoir CO2 pressure-drive oil displacement and burying numerical simulation, and can better simulate the porosity and permeability change and the evolution of a damaged area in the CO2 pressure-drive oil displacement and burying process.

The utility model relates to petroleum exploitation technical field especially is a kind of fracturing quartz sand heat treatment strengthening device, including main part, the top of main part is fixedly connected with conveying assembly, the side of main part is provided with control assembly, and the inside of control assembly is provided with heat treatment assembly;The utility model is in by utilizing the multiple electric heating elements that heating furnace is equipped with, and electric heating element is evenly distributed on the inner wall of heating furnace, to ensure the uniformity of heating, heating furnace carries out heat treatment to fracturing quartz sand, improves its strength and high-temperature resistance, to improve the effect of oil exploitation, temperature sensor can be used for real-time monitoring the temperature in heating furnace, and temperature controller controls the power of electric heating element according to the feedback signal of temperature sensor, to keep the temperature in heating furnace in set range, real-time monitoring and control the temperature in heating furnace, can ensure the stability and uniformity of heat treatment process.

The application discloses a kind of oil exploitation method and device for strengthening the rate of horizontal well group heat mass transfer, the method comprises: when meeting preset heating condition, start heating, at this time, close the production well in the horizontal well group, open the injection well in the horizontal well group, open the electric heater arranged in the injection well, and inject hot gas into the injection well, wherein the heating condition comprises: the daily gas production of the production well is less than the preset production value and the horizontal well group produces horizontal fracture and / or vertical fracture meeting the requirements;After heating is completed, the injection well is closed, the production well is opened, and oil exploitation is started.The application proposes a synergistic heating method combining electric heating and hot gas injection, and uses a cyclic production mode, significantly improves the reservoir heating rate and heat mass transfer efficiency, effectively improves the oil exploitation effect and efficiency of the horizontal well group.

The invention relates to the technical field of underground hard rock mining, and provides a continuous non-explosive green mining N21 construction method for underground hard rock mining machinery, which is characterized in that a to-be-mined area is divided into N panels, and each panel is provided with two haulage roadways and one working face roadway. According to the construction method, a working face roadway is supported through a hydraulic supporting device, two rock breaking free faces are formed underground, and an additional free face brought by the drilling and grooving technology and high stress state relieving of an ore body are combined, so that the ore body is changed into an unconfined isolated state which is easy to mine from an unconfined overall state which is difficult to mine. According to the construction method, independent nine steps (rock drilling, explosive loading, line connection, ventilation, shovel loading, transportation, prying, supporting and filling) of a traditional drilling and blasting method are changed into continuous four steps (drilling crack, transportation, supporting and filling) of N21 construction method mining, the problem of mechanized continuous mining of underground hard rock ore bodies is solved, rock breaking capacity, mining efficiency and resource recovery rate are remarkably improved, and meanwhile, the construction efficiency of the underground hard rock ore bodies is improved. The mining safety is greatly improved, and the environmental influence is reduced.

The present invention provides a nitrogen surfactant composite injection method and application, and relates to the field of oil production technology. The method comprises sequentially injecting a composite surfactant front plug, a nitrogen main plug, a composite surfactant rear plug, and a nitrogen rear plug into the oil reservoir, shutting the well, and opening the well for production; wherein the composite surfactant in the composite surfactant front plug and the composite surfactant rear plug comprises: a main surfactant, an auxiliary surfactant, and water; the main surfactant comprises an oil-soluble surfactant and a fatty amide propyl dimethyl amine oxide; the auxiliary surfactant comprises a fatty alcohol polyoxyethylene polyoxypropylene block copolymer and a natural surfactant. The method can greatly reduce the oil-water interfacial tension, and can effectively inhibit the occurrence of gas cross-flow in the exploitation of low-permeability fault block oil reservoirs. The reagent enters a farther well area under the high pressure of nitrogen, thereby improving the oil washing efficiency and oil increase effect.

The utility model relates to the technical field of oil exploitation intelligent well completion, and discloses an underground wet-type butt joint device, which comprises a male joint part and a female joint part, an upper cable is arranged on one side of the male joint part, a locking cap is arranged on one side of the upper cable, a hoop is arranged at the bottom of the locking cap, and the female joint part is connected with the upper cable. One side of the upper cable is provided with a sealing mandrel, one side of the sealing mandrel is provided with a first sealing ring, and the top of the sealing mandrel is provided with a lifting nipple. The underground wet-type docking device not only can meet the filling and sand prevention operation of a lower well completion, but also can effectively communicate an upper well completion system and a lower well completion system, and effectively connects and separates an underground production fluid control system, an underground dynamic monitoring and signal transmission system and a ground remote control system; and the upper well completion and the lower well completion are effectively butted in a humid environment, so that the real-time monitoring and control of the underground production state are realized, and the exploitation effect of an oil well is improved.

The invention discloses a well selection method and system for ultra-low permeability reservoir water injection well updating, and belongs to the technical field of oilfield development. The well selection method comprises the following steps that a target oil reservoir water injection well updating potential evaluation system is established; obtaining index parameters in the target oil reservoir water injection well update potential evaluation system corresponding to the target oil reservoir water injection well update candidate well, and normalizing the index parameters; and determining a potential comprehensive evaluation index of the updated to-be-selected well of each water injection well of the target oil reservoir, and determining a planned implementation well according to descending order arrangement. The method can solve the problems of low manual well selection efficiency, high individual subjectivity and large result difference at present, and ensures the implementation effect of updating of the water injection well.

The invention discloses a well seismic analysis system, method and equipment based on a compact sandstone geology-mechanics coupling lithofacies system, and relates to the field of compact sandstone oil and gas exploitation and analysis. A compact sandstone reservoir geology-mechanics coupling lithofacies classification mode is constructed according to the information data through a classification mode construction module by adopting a four-element composite triangular diagram method; the integration module performs geomechanical coupling lithofacies division and multi-type lithofacies prediction result integration on the single well level according to the element difference data; and the analysis and determination module performs geology-mechanics coupling lithofacies feature extraction, lithofacies classification feedback adjustment and seismic attribute mapping based on the tight sandstone reservoir geology-mechanics coupling lithofacies well-seismic collaborative three-dimensional model, and determines tight sandstone geology-mechanics coupling lithofacies distribution information data. According to the method, the heterogeneity distribution rule of the rock mechanics and ground stress characteristics of the tight sandstone reservoir can be determined, and a basis is provided for improving the exploitation effect of tight sandstone oil and gas.

This application relates to the field of oilfield development technology, and particularly to an oil production equipment and method. The oil production equipment includes a support base, packers, a water injection oil production assembly, and a controller. The support base is connected to the water injection oil production assembly. Multiple water injection oil production assemblies are arranged sequentially along the height direction and connected to each other. Each water injection oil production assembly has an oil inlet and a water outlet. The oil inlet allows crude oil from the outside to enter, and the water outlet supplies water to leave the water injection oil production assembly and inject it into the oil layer. Multiple packers are also present, with two adjacent packers forming a flow cavity with one water injection oil production assembly. The oil inlet and water outlet of each water injection oil production assembly are connected to the same flow cavity, and adjacent flow cavities are relatively sealed. The controller controls the opening and closing of the oil inlet and the water outlet. The oil production equipment of this application can improve the oil production efficiency.

The invention provides a method for forming a complex crack network by utilizing chemical hydrogen generation multi-stage burning explosion. The method comprises the following steps: (1) preparing gas generation particles; (2) an electric spark device is assembled, and an underground electric spark module of the electric spark device is hung on the second drillable bridge plug; (3) putting a first drillable bridge plug into the rear end of the appointed position of the pre-drilled vertical shaft; (4) gas production particles are put into a designated position in the vertical shaft, and then water is injected; (5) putting a second drillable bridge plug into the front end of the appointed position of the vertical shaft; (6) igniting by using an electric spark device; (7) drilling off the first drillable bridge plug and the second drillable bridge plug by using a drill bit; (8) repeating the steps (3)-(7) in a pre-drilled horizontal shaft; and (9) standing until the mixture of hydrogen and oxygen in the reservoir is fully detonated, and forming a new fracture network in the reservoir. By means of the method, more branch fractures can be made, the reservoir diversion effect is enhanced, the diversion capacity is improved, the reservoir recovery rate is effectively increased, and the method is suitable for being used in low-permeability reservoirs.

The invention discloses a henhouse mine exploration and mining combined prospecting and mining method, which forms an effective exploration and mining project according to the metallogenic characteristics of a henhouse mine stope, perfects the accurate mining project by combining the basic characteristics of the original project, and further perfects the mining and cutting project by combining the selected mining method in the mining process. The comprehensive utilization of mineral resources can be improved, the prospecting cost is reduced, the prospecting pressure is relieved, the mine service period is prolonged, meanwhile, a mine enterprise adopts a personalized mining scheme according to mine geologic features, ore properties, topographic conditions and the like, the optimal mining effect is achieved, the humanized requirement of green mine construction is met, and the method has great significance in technical innovation and process upgrading. The production benefits of mine enterprises can be improved, the production cost is reduced, and the sustainable development of mines is promoted.