Production decline analysis method and device for tight sandstone gas reservoir fractured vertical well

The invention discloses a compact sandstone gas reservoir fractured vertical well production decline analysis method and device, and the method comprises the following steps: combining production data of a compact sandstone gas reservoir target well with a b < l > as i < ngame > decline curve chart for analysis, and building a compact sandstone gas reservoir production data diagnosis chart; analyzing the tight sandstone gas reservoir production data diagnosis chart to obtain a tight sandstone gas reservoir production dynamic characteristic diagnosis table; and according to the tight sandstone gas reservoir production dynamic characteristic diagnosis table, the tight sandstone gas reservoir fracturing vertical well yield is subjected to decline analysis. The method is high in accuracy, and compared with a reservoir homogeneous and ideal model assumed by laboratory simulation, the method has higher geological adaptability and field practicability for tight sandstone gas reservoirs.

Rare earth modified photocatalyst as well as degradable plastic film prepared thereby and preparation method thereof

The invention discloses a rare earth modified photocatalyst and a degradable plastic film prepared by the rare earth modified photocatalyst and a preparation method thereof. The rare earth modified photocatalyst of the invention consists of lanthanon and titanium dioxide, and weight of the lanthanon is 0.1 to 10 percent of that of titanium elements. The rare earth modified photocatalyst is blended with polyolefin resin, then the degradable plastic film can be prepared, and the weight of the rare earth modified photocatalyst is 0.1 to 20 percent of that of the polyolefin resin. The visible light utilization ratio of the rare earth modified photocatalyst is improved by 50 percent, bactericidal rate reaches 70 percent, contact angle is less than 10 degrees, the effect of the degradable plastic film is significant, and degrade ratio can reach 20 to 60 percent. The raw materials of the rare earth modified photocatalyst are inexpensive and innoxious, the preparation method is simple, and the ...

Slipper with vamp ornament capable of being folded and unfolded and replaced easily

The invention relates to a slipper with a vamp ornament capable of being folded and unfolded and replaced easily. The slipper comprises a sole, a vamp and the vamp ornament. The vamp ornament is connected with the vamp through movable buckles, and replacement of the vamp ornament is achieved. The vamp ornament is connected with the sole through pressing buckles, and a sunscreen warming layer in the vamp ornament can be folded an unfolded to achieve sunscreen or warming or cooling. The slipper with the vamp ornament capable of being folded and unfolded is scientific in design, simple in structure, practical and convenient. The vamp ornament can either serve as the ornament of the surface of the tipper when being folded or achieve the functions of sunscreen and warming when being unfolded, and the vamp ornament capable of being folded and unfolded can be used according to weather, occasions, personal willingness and the like. The slipper solves the problems that the slipper is single in function ...

Rare earth modified photocatalyst as well as degradable plastic film prepared thereby and preparation method thereof

Special dish washing agent for dishwasher and preparation method of washing agent

The invention discloses a special dish washing agent for a dishwasher and a preparation method of the washing agent. The special dish washing agent for a dishwasher consists of the following components in percentage by mass: 25-45% of sodium hydroxide, 10-25% of sodium silicate, 8-15% of sodium citrate, 21-32% of peroxide, 3-4.8% of ethylenediaminetetraacetic acid disodium salt, 5-6% of non-ionic surfactant and 0.2-1% of a deflocculation agent. The preparation method comprises the following steps of mixing the sodium hydroxide, the sodium silicate, the sodium citrate, the peroxide, the ethylenediaminetetraacetic acid disodium salt, the non-ionic surfactant and the deflocculation agent, aging while stirring, grinding and sieving with a 20-mesh sieve to obtain the special dish washing agent for a dishwasher. The special dish washing agent for a dishwasher has the advantages of little foam, strong detergency, high sterilization efficiency, little residue, relatively strong odor removal capacity ...

Device for producing household organic fertilizer

The invention relates to a device for producing a household organic fertilizer, which comprises a screw dustbin used for anaerobic fermentation of peels and rotten vegetables, an openmouthed water tank filled with a solution capable of absorbing peculiar smell is arranged, a screw case cover is tightly screwed and connected to the screw dustbin, so that the screw dustbin is closed; the screw dustbin is communicated to the openmouthed water tank through an exhaust pipe, so that gas generated in the screw dustbin through fermentation is absorbed into the solution capable of absorbing peculiar smell in the openmouthed water tank; a pressure regulator valve is equipped on the exhaust pipe, so that the air pressure in the screw dustbin can be adjusted. A draining valve is arranged at bottom of the openmouthed water tank, and a box wall can be used for both screw dustbin and the screw case cover. The device uses peels and rotten vegetables for anaerobic fermentation to prepare the organic fertilizer ...

Household food stirring machine

The invention relates to a household food stirring machine, which comprises a machine cup and a machine cover, wherein the machine cup is used for containing food to be stirred, the machine cover is covered on the machine cup and is fixed with the machine cup, a single-phase alternating current electric motor is arranged in the machine cover, the lower end of a rotating shaft of the single-phase alternating current electric motor is provided with a turntable, a stirring rod positioned at the machine cup is arranged under the turntable, when the single-phase alternating current motor rotates after being electrified, the turntable and the stirring rod are driven to rotate through the rotating shaft, and food raw materials are sufficiently stirred so that the food materials can be sufficiently and uniformly mixed. The machine cup and the machine cover are fixedly connected through a fixing pile. The household food stirring machine has the advantages that the stirring rod arranged under the ...

Method for accelerating deoxidization, degradation and transformation of organic contamination in soil

Automatic sludge specific resistance measuring device and method

The invention provides an automatic sludge specific resistance measuring device and method. A vacuum pressure gauge is arranged on a vacuum pump, a pressure adjusting knob is arranged on a pressure adjusting bottle, a pressure sensor is arranged in the pressure adjusting bottle, and the vacuum pump is communicated with the inner ring of the pressure adjusting bottle through a first guide pipe; the Buchner funnel is arranged at the upper end of the filter, the mass sensor is horizontally placed in an inner cavity of the filter, and the measuring cylinder is placed on a measuring surface of the mass sensor; the output end of the Buchner funnel extends into the inner cavity of the filter and corresponds to an opening in the upper end of the measuring cylinder; the pressure regulating bottle is communicated with the inner ring of the filter through a second guide pipe; the PLC is respectively in signal connection with the pressure adjusting knob, the pressure sensor and the mass sensor, and ...

Chemical reactor for laboratory

The invention relates to a chemical reactor for a laboratory. The chemical reactor comprises a reaction cup for placing a reactant and a cup lid for sealing the reaction cup, wherein a single-phase alternating current motor and an exhaust pipe are arranged in the cup lid; a stirring rod is arranged at the lower end of the single-phase alternating current motor, and can stir the reactant, so that the reactant fully reacts; the exhaust pipe is provided with a pressure regulating valve at an exhaust opening; the pressure regulating valve can adjust the pressure inside the reactor, so that the pressure in the reactor is kept stable; and the reaction cup is tightened with the cup lid through a screw, so as to achieve the fixing and sealing effects. The chemical reactor is suitable for reaction between chemical substances in a solid-solid state, a liquid-liquid state, a solid-liquid state and the like. The chemical reactor has the advantages of being simple in structure, convenient to operate ...

ActiveX component, workstation and method and device for realizing dynamic program release

The invention discloses an ActiveX component, a workstation and a method and a device for realizing dynamic release of a program. The ActiveX component comprises an application scene interaction module and an application scene interaction module, wherein the application scene interaction module is used for running the ActiveX component and initializing a running environment; the program release management module is used for detecting the application program needing to be subjected to program updating and synchronizing an updating file of the application program to a local workstation; and the program running management module is used for updating the application program of the local workstation and providing an interface operation interface on the local workstation. The operation complexity of field operation and maintenance personnel of the power system can be reduced, and the reliability of the power system is improved.

Smashing, compressing and moulding equipment for fruit and vegetable garbage and moulding method thereof

The invention relates to the technical field of environmental sanitation equipment and particularly relates to smashing and compressing equipment, more particularly smashing, compressing and moulding equipment for fruit and vegetable garbage. The equipment comprises a compressing and moulding device and a cutting and smashing device. The cutting and smashing device comprises a smashing material inlet and a smashing bin. Main shafts pass through the smashing bin and then are connected to a power mechanism outside of the smashing bin. The main shafts are provided with fly-cutter groups. A material collecting plate is disposed below the fly-cutter groups. A material pushing plate moving left and right is disposed at the left side below the material collecting plate. A smashed material outlet is disposed at the right side below the material collecting plate. A compression material inlet of the compressing and moulding device is disposed at the right side of the smashed material outlet. By adopting ...