56 results about "Bottom water" patented technology

This invention relates to the field of natural gas development and discloses a method, apparatus, storage medium, and processor for predicting the production of bottom-water gas reservoirs. The method includes: training a model based on a training set of production data from the bottom-water gas reservoir to obtain a first long short-term memory (LSTM) neural network model; optimizing hyperparameters based on a validation set to obtain a second LTM neural network model and a corresponding first error; testing the model based on a test set to obtain a corresponding second error; determining the generalization degree based on the first and second errors, and using the second LTM neural network model with a generalization degree meeting preset requirements as the target bottom-water gas reservoir production prediction model; and predicting the production of the bottom-water gas reservoir based on the target bottom-water gas reservoir production prediction model. This method captures long-term dependencies in time-series data using a LTM neural network, which can significantly improve the accuracy of bottom-water gas reservoir production prediction, thereby providing reliable support for oil and gas exploration and production decisions.

This disclosure relates to the field of petroleum exploration and development technology, and in particular to a method and system for determining bottom water intrusion characteristics. The method includes: determining the water permeability and the correlation coefficients between the matrix and fractures in a target block of a fractured sandstone gas reservoir; establishing and solving a mathematical model for cylindrical bottom water intrusion in a single well of the fractured sandstone gas reservoir based on the determined water permeability and the correlation coefficients between the matrix and fractures, obtaining a pressure function representing the difference between the original water pressure and the pressure at any point within the gas reservoir; using the obtained pressure function, determining the dimensionless bottom water intrusion volume; and determining the cylindrical bottom water intrusion characteristics of the dimensionless bottom water intrusion volume with respect to dimensionless time based on the determined dimensionless bottom water intrusion volume. By establishing a mathematical model of bottom water intrusion and calculating the cumulative water intrusion volume, the bottom water intrusion characteristics are determined, enabling an understanding of the entire dynamic process of bottom water intrusion in the reservoir.

The application discloses an aquaculture tail water biological membrane purification device, and belongs to the field of environmental engineering water treatment. The device realizes tail water purification through a multilayer purification zone series connection structure, comprises a main body shell, a top water inlet and a bottom water outlet, at least two purification zones are arranged in the main body shell, the at least two purification zones are separated by a flow interception plate and are connected through a spiral descending water tank; the purification zone is filled with gravel (physical filtration and gradient denitrification), biological suspended filler (aerobic biological membrane oxidation) and coupled autotrophic filler (sulfur-iron synergistic denitrification and phosphorus removal) in layers. The spiral water tank prolongs the water residence time, and an aerator strengthens oxygen transfer; modular drawer plates and rotating plate supports facilitate maintenance, and combined with microbial flora and water quality sensor cloud monitoring, efficient synergistic removal of pollutants and system self-adaptive regulation and control are realized.

The utility model discloses a water quality monitoring sampling device based on unmanned plane delivery realizes the goal of automatic sinking, fast, automatic sampling after delivery. The top and bottom of sampling cylinder are equipped with annular flange and check valve mounting disc, the annular flange is connected unmanned plane through the rope, and the check valve core is installed in the ladder hole of check valve mounting disc, and the spring is arranged between check valve core and ladder hole, the slip ring sliding sleeve is arranged on the outside of sampling cylinder and the magnetic ring body is fixedly installed on the slip ring, the inner chamber of sampling cylinder is provided with magnetic piston assembly, the magnetic piston assembly is attracted with the magnetic ring body of outside, when the magnetic ring body moves, the magnetic piston assembly is driven to move in the sampling cylinder. The technology uses unmanned plane to assist the suspension operation, realizes the goal of automatic sinking after delivery, and the water quality of water bottom layer is fast and automatically sampled, the check valve core is automatically closed after sampling, and returns to the shore quickly, and can repeatedly sample.

This utility model relates to a flood control barrier and its components, belonging to the technical field of flood control equipment. The flood control barrier includes a water-blocking single plate, which comprises an outer high-strength steel plate. The inner cavity of the outer high-strength steel plate contains a honeycomb sandwich layer and a rubber buffer layer. The flood control component includes two support columns fixed to the side wall of a wall. The inner side of each support column has a U-shaped slot. The flood control barrier also includes its two ends inserted into the slots. Sealing gaskets are fixed to the bottom wall and one side wall of the slots. Fastening bolts are provided on the other side wall of the slots. A clamping mechanism is provided at the top of each support column to press the top of the two ends of the flood control barrier. This utility model significantly improves impact resistance. Furthermore, the bottom water-blocking single plate has a rubber block, which increases the sealing effect with the ground. Additionally, a supporting flange is provided on the rear side of the rubber block to support it and prevent it from shifting or falling off under the impact of water flow.

The utility model discloses a pivot waterproof structure for car cover, including first rotating board, second rotating board and pivot hinge, first rotating board and second rotating board all are connected with pivot joint, and first rotating board and second rotating board are connected through pivot hinge, and the pivot hinge is limited through limiting component, first rotating board and second rotating board opposite side are connected with top water baffle and side water baffle, and two top water baffles are equipped with top water baffle boss, and two side water baffles extrude each other, and form the drainage water channel, pivot joint is equipped with joint inclined plane, and the joint inclined plane is connected with bottom water outlet through the drain hole. The utility model discloses through the improvement to pivot structure makes it have better waterproof effect, can realize the whole process waterproof of pivot rotation process.

The application discloses a method for integrated water control and oil stabilization of edge-bottom water thickened oil reservoirs, which utilizes a composite combination mode to fully exert the synergistic effect among N2 foam+CO2 viscosity reducer+N2 huff and puff, the injection of N2 foam compresses the downward movement of water cone, slows down the bottom water coning, CO2 viscosity reducer cooperates with deep propulsion, greatly reduces the viscosity of crude oil, N2 high elasticity displaces crude oil, and supplements the formation pressure, so that the edge-bottom water producing range is enlarged, and the edge-bottom water thickened oil reservoir water control and oil stabilization technology is innovatively proposed to slow down the bottom water coning, reduce the viscosity of crude oil, inhibit the water content rise, and thus improve the oil reservoir recovery factor. The research result can provide a reference basis for the formulation of mining technical schemes and the optimization of injection-production parameters of similar block edge-bottom water thickened oil reservoirs after entering the high water cut period.

The utility model relates to floor washing machine accessory technical field, and disclose a kind of cloth for floor washing machine to avoid entanglement, including from top to bottom sequentially composite surface cleaning layer, intermediate water absorption layer and bottom water-locking fixed layer, the surface of surface cleaning layer is equipped with bionic suction cup type concave and convex corrugation and anti-entanglement convex point, the anti-entanglement convex point is fixed with surface cleaning layer by flexible connecting structure, SAP water-absorbing resin particles are evenly embedded in the intermediate water absorption layer, and multiple longitudinal hollow fiber tubes are equipped between and bottom water-locking fixed layer, the pipe wall of longitudinal hollow fiber tube is equipped with multiple water-permeable micropores, the bottom water-locking fixed layer is seaweed fiber three-dimensional grid structure, and the grid gap of bottom water-locking fixed layer is filled with water-locking gel.

The present application relates to a kind of block bottom water buried hill reservoir original oil-water interface determination method, belong to the technical field of reservoir development.In single stratum trap, the favorable position of structure is selected to implement test production well, and the preliminary original oil-water interface h i Of stratum trap is obtained by geological information, then the test production well is carried out test production by selecting perforation horizon, when the comprehensive water content of test production well evaluation period is not more than 10%, preliminary original oil-water interface h i Equal to final original oil-water interface h u When the comprehensive water content of test production well evaluation period is more than 10%, preliminary original oil-water interface is reviewed and corrected, so that final original oil-water interface is accurately calculated.The present application comprehensively considers the trap type and storage and seepage characteristics of block bottom water buried hill reservoir, and accurately calculates the original oil-water interface of block bottom water buried hill reservoir with layered structure by using multiple technical means such as comprehensive geochemical logging, well logging, gas logging, test production evaluation, etc., to provide basis for reserve evaluation and development deployment.

The utility model provides a kind of for powder zinc infiltration process anti -blocking workpiece cleaning equipment, it is related to cleaning equipment technical field, and it includes: cleaning tank, multiple cleaning tanks are provided in cleaning tank, and multiple cleaning tanks are arranged in echelon shape;Water inlet pipeline, water inlet pipeline is communicated with the bottom surface of cleaning tank, and water is supplied to cleaning tank by the bottom of cleaning tank;Lifting adjusting part, lifting adjusting part is installed on cleaning tank;Loading basket, loading basket is detachably set in the output end of lifting adjusting part, and loading blue is used to load zinc infiltration workpiece, and reciprocating lifting cleaning in cleaning tank is driven by zinc infiltration workpiece through lifting adjusting part.The utility model washes by the mode of bottom water inlet and top drainage, effectively avoids the blockage problem caused by filter residue deposition, and in addition, reciprocating lifting cleaning in cleaning fluid is driven by zinc infiltration workpiece with lifting adjusting part, can greatly improve cleaning effect, with the characteristics of simple structure, convenient operation.

The application discloses an intelligent cleaning and drainage prevention system for preventing crystallization blockage of a drainage pipe in a soluble rock tunnel, comprising a supporting system and a drainage system, wherein the supporting system comprises a bottom plate type composite lining, a tunnel bottom water passing culvert and a concrete backfill retaining wall; the bottom plate type composite lining and the tunnel bottom water passing culvert are integrally cast together; the concrete backfill retaining wall is arranged in the range of large-scale dissolution cavities on both sides, so that the whole supporting system is closely attached to the surrounding rock of the tunnel, and the integrity of the supporting structure is ensured; the drainage system comprises the tunnel bottom water passing culvert and a vertical water collecting well; the vertical water collecting well is connected with the tunnel bottom water passing culvert to form an integral whole; the underground water around the tunnel is collected by the vertical water collecting well and is discharged outside the tunnel structure range through the tunnel water passing culvert, so that the drainage property of the supporting structure is ensured; the application can realize rapid treatment of the tunnel crossing a huge underground river, has reasonable structure, is simple in construction, and enhances the stability and drainage property of the tunnel structure.

This invention relates to the field of slope protection construction technology and discloses a slope structure for soil and water conservation in arid areas. Several transverse water collection channels are arranged at equal intervals and buried within the slope. Water diversion and collection components are installed on the transverse water collection channels, and a slope bottom water collection channel is located at the bottom of the slope, with the transverse water collection channel at the bottom of the slope positioned above the slope bottom water collection channel. It adopts a planting grass grid base structure and simultaneously incorporates a structural structure to form a water resource recycling and reuse structure. This allows for efficient use of water resources to irrigate and maintain the planted soil-stabilizing vegetation, thereby improving vegetation survival rate and reducing long-term investment costs. The water collection structure also forms a reinforcing structure in the lower layer of the slope foundation, effectively maintaining the foundation stability of the slope. Thus, by combining vegetation soil stabilization and structural soil stabilization, the invention maintains low-cost slope protection while ensuring the soil and water conservation performance of the slope protection.

The application provides a bottom water reservoir CO2 oil displacement and storage coordinated development method and system, which collects information of a target work area, and determines a component numerical simulation model matched with the target work area; determines a plurality of deployment positions of a horizontal injection well in a water layer in combination with water injection well conditions, oil layer thickness and oil-water interface positions of the reservoir, and uses the component numerical simulation model to simulate and calculate the deployment positions of the target injection well in order to optimize oil increment and storage capacity; further sets feasible injection parameters, and uses displacement effect and storage effect as optimization targets to simulate and calculate the injection mode of the target parameters; sets feasible injection and production speed combination schemes according to liquid production before gas injection, and simulates and calculates the injection speed and liquid production speed with the optimal oil increment and storage capacity. The scheme can overcome the problem of incomplete optimization effect in the prior art, effectively plays the energy and capacity of edge and bottom water, and realizes the increase of a large oil increment and the increase of CO2 storage capacity.

This application provides a water outlet system for reoxygenation of the bottom layer of deep-water lakes and reservoirs, belonging to the field of deep-water lake and reservoir reoxygenation technology. The water outlet system includes a reoxygenation device, at least one outlet main pipe connected to the oxygen-enriched water outlet of the reoxygenation device, several water distribution devices installed on the outlet main pipe, and vertical branch pipes vertically installed in the water body. The outlet main pipe is connected to several main pipe floats to keep it afloat on the water surface. The water distribution devices include branch pipes connecting the outlet main pipe and the vertical branch pipes, used to divert oxygen-enriched water from the outlet main pipe to the vertical branch pipes. Through this method, the application enables the main pipe floats to float on the water surface, reducing construction difficulty and cost, and improving the system's flexibility and applicability. Simultaneously, this application directly delivers oxygen-enriched water to the anoxic area above the bottom sediment of the deep-water lake or reservoir through the water distribution devices and vertical branch pipes, achieving deep and precise reoxygenation, and effectively increasing the dissolved oxygen concentration of the bottom water.

The utility model relates to the technical field of fishery equipment discloses a cultivation cabin and semi-submersible sea-through type cultivation factory ship based on marine wave energy water exchange, which comprises a ship body, a cultivation cabin is arranged below the deck of the ship body, the cultivation cabin comprises a cabin room, a sea-through water exchange opening is arranged on the side of the cabin room, a water outlet pipeline is arranged at the bottom of the cabin room and is communicated with the sea-bottom water exchange opening, a first one-way valve is arranged on the water outlet pipeline to drain water outward from the cabin room, when the surge wave enters the cabin room from the sea-through water exchange opening and generates a pressure difference exceeding the preset pressure difference, the first one-way valve is opened to drain water outward in one direction until the internal and external pressure differences are the same, the cultivation factory ship utilizes wave energy to drive water exchange, can significantly reduce energy consumption and improve the uniformity of water exchange, ensures that the seawater quality can meet the demand of cultivation, and reduces the operation cost of offshore cultivation.

The application provides a multi-nutrition level mixed culture device for surface layer and bottom layer aquaculture species, which comprises four fixed piles, a fixed frame is fixedly installed between the top ends of the four fixed piles, longitudinal rods are fixedly arranged between the two sides of the fixed frame corresponding to the fixed piles, a transverse rod is fixedly arranged between the bottom ends of the left and right fixed piles, an adjusting mechanism is arranged on one side of the diagonal fixed piles, and a second lifting frame and a first lifting frame are arranged between the four fixed piles from bottom to top through the adjusting mechanism. The marine space can be fully utilized, the utilization rate of feed is improved, the wind and wave resistance is stronger, and the ecological culture of the surface layer and bottom layer aquaculture species is beneficial.

The present application belongs to the technical field of water treatment and environmental engineering, in particular to a gradient water flushing-chemical preservation backwashing method and device for a denitrification biofilter, comprising a cylinder and a flushing assembly arranged on a base; the cylinder is sequentially provided with a bottom water inlet area, a middle filler area and a top water outlet area from bottom to top; the top of the water outlet area is provided with a water outlet pipe; the bottom of the water inlet area is provided with a water inlet pipe; the inside of the filler area is provided with a perforated plate for loading filter material; the flushing assembly is arranged on the cylinder and used for flushing the filter material; through the gradient hydraulic design of "low-high-low", the present application realizes fine cleaning from top to bottom, compared with traditional single water flushing, can effectively remove the blockages, through the optimization of the starting and ending stages, significantly reduces the impact on the functional biofilm, and better preserves the denitrifying bacteria.

This invention belongs to the field of experimental technology for oil and gas field development, specifically relating to an experimental device and method for CO2 injection at the gas-water interface to suppress bottom water displacement of natural gas. The device includes a reservoir simulation system, a fluid injection system, a multi-dimensional visualization monitoring system, and a production metering system. The reservoir simulation system uses a sand-filled pipe to simulate a vertical reservoir, and a temperature control module regulates the temperature of the sand-filled pipe. The fluid injection system uses a fixed-point injection pipe with adjustable depth that can penetrate deep into the pipe body to precisely inject CO2 into the gas-water interface. The multi-dimensional visualization monitoring system uses a scanner and krypton tracers mixed with simulated natural gas and sodium iodide tracers mixed with simulated formation water to achieve dynamic monitoring of multiphase fluids throughout the displacement process. This invention can simulate the vertical development characteristics of deep bottom water gas reservoirs with high fidelity, intuitively revealing the mechanism of CO2 inhibition of bottom water coning, and providing precise experimental basis for optimizing gas reservoir development schemes.

The utility model relates to the technical field of breeding equipment, and disclose a kind of zero water change of sand class aquatic animal circulation water aquaculture equipment, including several breeding barrels, and the multifunctional barrel is equipped in breeding barrel side, and ceramic filter layer is placed in the bottom of breeding barrel inner wall, and sand filter screen is fixed in the top of ceramic filter layer in breeding barrel inner wall, and breeding sand layer is equipped in the upper portion of sand filter screen, the device is integrated bottom water flow plowing, microfiltration separation and low oxygen denitrification triple technology by breeding barrel and multifunctional barrel, microfiltration machine is realized water efficient solid-liquid separation by screen dynamic interception mechanism, to remove larger impurities in aquaculture wastewater in physical interception mode, sponge barrel top connecting cover plate creates low oxygen environment, and internal filling biochemical sponge, after the water treated by microfiltration machine, further denitrification reaction occurs, reach the water quality purifying effect, and oxygen and water are efficiently mixed by gas-liquid rotation mixing and gradient dissolution mechanism of dissolving oxygen device, so that oxygen-rich water enters breeding barrel.

The present application relates to a kind of water plugging methods of screen gravel filling self-flowing oil well, including accurate identification water layer section by comprehensive well logging, production logging and numerical simulation data;Determine packer setting position based on well condition and indoor experiment;Design coiled tubing and tubing annulus injection temporary plugging agent temporary sealing upper oil production layer and gravel packing annulus, while injecting temporary plugging agent, coiled tubing injects certain viscosity preflush, prevent temporary plugging agent from entering bottom water production layer, prevent subsequent main blocking agent damage;Determine preflush viscosity according to reservoir permeability simulation sand filling pipe test.Determine main blocking agent injection time according to temporary plugging agent gel time, ensure that main blocking agent enters water production layer after gelation.Main blocking agent needs to have lower viscosity, to ensure that it enters water production layer first, and forms high-strength plugging barrier;Finally, release packer and induce flow.This application has achieved the beneficial effects: realize the deep precise plugging of water production layer, maximize the protection of oil production layer, effectively extend the self-flowing period of oil well and improve the recovery of crude oil.

The application relates to an oil well well spacing optimization method and device for edge-bottom water reservoirs, and the method comprises the following steps: based on oil well well spacing and parameter data, the pressure distribution of the edge-bottom water reservoir under the condition that an arbitrary number of oil wells are simultaneously and stably produced is calculated by using a mirror image superposition principle; based on the pressure distribution of the edge-bottom water reservoir, the movement trajectory of fluid in the edge-bottom water reservoir is calculated and drawn by using a Pollock method, and the movement trajectory of the fluid is a streamline; the water saturation at an arbitrary time and an arbitrary position along the streamline is calculated by using a Buckley-Leverett method, so that the water saturation distribution in a two-dimensional simplified model is obtained, and the time for the water drive front saturation on each streamline to move from a supply boundary to the bottom of the oil well is calculated, so that the water drive front breakthrough time is determined; based on the water drive front breakthrough time, a relationship curve between the oil well well spacing and the cumulative oil production is drawn, and the optimal oil well well spacing of the edge-bottom water reservoir is determined.

This application provides a method and apparatus for evaluating the dynamic connectivity between wells in water-injection development reservoirs, relating to the field of reservoir water-injection development technology. The method includes: establishing virtual well points within the reservoir area under lithofacies control; establishing virtual nodes representing edge water and / or bottom water; simplifying the reservoir area into several connecting units between reservoir well points, where reservoir well points include real wells, virtual well points, and virtual nodes; assigning characteristic parameters to the connecting units to obtain a dynamic connectivity model between reservoir wells; minimizing the error between the actual dynamic production indicators and the predicted dynamic production indicators of the reservoir area; updating the characteristic parameters of the connecting units to the characteristic parameters that minimize the error; and evaluating the inter-well connectivity relationship using the corrected dynamic connectivity model. As described above, by establishing a dynamic connectivity model between reservoir wells that better reflects real geological understanding, an efficient and accurate evaluation of the inter-well connectivity relationship is achieved.

This utility model discloses a multi-channel concrete impermeability testing device, relating to the field of concrete testing technology. It includes a testing machine body with a connecting ring fixed to the top. A mold cylinder is detachably connected to the upper end of the connecting ring, and a water passage hole is formed inside the connecting ring. An anti-clogging filter plate is detachably and fixedly embedded at the upper opening of the connecting ring. Multiple vertically penetrating irregularly shaped anti-clogging holes are formed on the anti-clogging filter plate, all of which communicate with the water passage hole. Irregularly shaped support holes are also formed inside the anti-clogging filter plate. This utility model, through the arrangement of irregularly shaped anti-clogging holes and support holes, creates a three-dimensional and varied anti-clogging channel on the anti-clogging filter plate, thereby achieving a good anti-clogging effect. At the same time, it continues the traditional bottom water injection testing method. Therefore, while achieving the anti-clogging effect, it retains the function of allowing users to observe the concrete test specimen in real time, thus providing more accurate test results.

The utility model relates to pneumatic shield gate maintenance technical field, specifically is a kind of flood control pneumatic shield gate, including shield plate, air bag is installed to support it on shield plate outer side, the bottom plate is hingedly connected in shield plate bottom, bottom plate is fixed to ground, and the top inlay installation of bottom plate is equipped with multiple for blowing away silt jet head, the utility model is discharged before silt, high-pressure gas is sprayed to silt, so that silt disperses, moves up, and again dispersed to bottom water flow, then second electric valve is opened, under the action of water pressure, bottom water flow carries silt and discharges, first silt is lifted, then is discharged, so that silt discharge is more thorough, after discharging for a period of time, pollution hole, small isolation net can be covered by leaf and impurity, so that the second electric valve flow is slower, at this moment, second electric valve can be closed, third electric valve is opened, and pollution hole, small isolation net is back-flushed and dredged, without staff submersion operation, continue to carry out pollution operation after back-flushing.

The present application relates to the technical field of computer-aided design, in particular to a river ecological flow optimization method based on three-dimensional flow field simulation. The specific implementation process comprises: obtaining river data, extracting river basin boundary and constructing river flow field simulation model; performing fluid dynamics solution to output vortex structure, introducing bottom water flow momentum to extract hydrodynamic characteristic flow; constructing simulation fluid matrix to calculate swimming work consumption, and delineating river ecological zone to obtain three-dimensional ecological flow volume; monitoring spatial form fluctuation curve, converting global optimal ecological flow into water conservancy facility flow scheduling instruction output. The present application depicts the river bottom vortex structure and microscale hydrodynamic characteristics in the digital space by constructing the river flow field simulation model, improves the fine degree and physical reality of the flow field simulation, and improves the automation level, continuity and decision accuracy of the ecological flow determination by deeply coupling the hydrodynamic characteristic flow and biomechanics parameters.

The present application relates to the field of fluid mechanics experimental equipment, and discloses a kind of test device for simulating the flow of water flow in city generalized block, comprising: bottom water tank, water delivery pipeline, flow channel assembly consisting of water passage, measuring open channel, triangular weir, flat-top weir, the height of flat-top weir is adjustable and the end is provided with flow guide port, and the intersection of each water passage intersection is provided with detachable adjusting plate.The present application simulates the street of city generalized block by water passage in each flow channel assembly, changes the installation position of baffle at intersection to make the model form different water flow layout forms, changes the water level by adjusting the height of flat-top weir, and the V-shaped flow guide port can play the role of confluence, so that the water level line can be measured more accurately, the flow in measuring open channel can be measured by triangular weir to deduce the flow of water passage, and finally the relationship between water depth, flow pattern and flow under different block layout can be obtained through experiment.

This utility model discloses an improved vortex grid flocculation reaction device, comprising: an inner cylinder, an outer cylinder, an inlet pipe, and an outlet pipe. The inner cylinder is disposed inside the outer cylinder. One end of the inlet pipe passes through the outer cylinder and connects to the inner cylinder, while one end of the outlet pipe extends into the outer cylinder. The inner cylinder has multiple layers of vortex reaction zones and a bottom water distribution zone arranged sequentially from top to bottom. The multiple layers of vortex reaction zones are connected to the bottom water distribution zone. Several vertical grid plates are disposed within the multiple layers of vortex reaction zones. Through the application of this utility model, an improved vortex grid flocculation reaction device is proposed, which is applicable to circular integrated water purification devices. By increasing the vortex characteristics, the flocculation reaction effect can be improved, effectively promoting the aggregation of colloidal particles and tiny suspended solids in the water. This not only helps reduce the dosage of flocculant and lower water purification costs but also improves the quality and quantity of effluent, ensuring the quality and supply of drinking water for residents.

Described herein are methods and systems for enhanced oil recovery (EOR). The methods and systems are especially suitable for enhancing oil recovery in bottom-water drive producing formations having a gas cap where coning of bottom water is a problem. An external gas such as natural gas is injected into the gas cap. This essentially eliminates the bottom water drive and replaces it with top gas drive. The amount of gas delivered is calculated to replace the volume of oil produced from the well and maintain a constant pressure at the gas-oil interface, which maintains horizontal thrust to the production point and maintains a stable oil-water interface, preventing coning. The methods expand the area of oil recovery.

The present application relates to blue-green algae treatment technical field, disclose a kind of for urban lake blue-green algae treatment floating filter device, comprising: floating plate, the floating ball is fixedly installed in the bottom of the floating plate, the mounting plate is fixedly installed on the floating plate, the mounting plate is connected with external walking component, the separation tank, temporary storage cylinder, medicine cylinder and water suction pump are fixedly installed in the top of the floating plate, the height difference of temporary storage cylinder and separation tank is formed natural liquid level potential energy by communicating vessel principle, cooperate water suction pump, water inlet pipe complete blue-green algae water suction temporary storage, again by first solenoid valve opening and closing control water body flow, without centrifugal, pressurization and other complex separation means, rely on bottom water inlet thrust to lift liquid level and realize flocculation blue-green algae natural overflow, both reduce separation energy consumption, and can realize blue-green algae flocculation and clear water in situ layering, solve the problem that traditional blue-green algae treatment equipment separation process is complex, energy consumption is high.