173 results about "Water development" patented technology

The invention discloses a method for water-flooding abandoned condensate gas reservoirs. The method includes performing full fluid PVT (pressure-volume-temperature) analysis first to complete long-core displacement experimental analysis. The long-core displacement experiment mainly includes the steps: selecting core samples on site; testing basic physical-property parameters of cores; splicing the core samples into a long core for displacement experiment, performing natural energy failure experiment, performing displacement in flooding, acquiring recovery rate of water-displacing condensate oil and condensate gas under different conditions according to the experiments, and comparing to determine the waterflood pattern which is most satisfactory to the requirement of increasing recovery rate of condensate gas reservoirs on site; and compiling a condensate gas reservoir water-flooding scheme according to indoor experiment results. The problem that existing depletion development of condensate oil-gas reservoirs is fast in energy decline, causes underground condensate oil loss and is low in production level is solved. Reasonable water-flooding speeds and water-flooding modes are optimally selected by the method and used for water flooding of abandoned condensate gas reservoirs, so that recovery rate of condensate oil-gas reservoirs is effectively increased.

The invention discloses a method for modeling a predictable physical model for fractured anisotropic oil reservoir water flooding development, and the method comprises the following steps: (a) establishing similarity criteria for simulating the fractured oil reservoir development according to characteristics of the process of fractured oil reservoir water flooding oil development and by utilizing theories of seepage mechanics and similarity analysis, wherein the similarity criteria comprise similarities in shape and space, shaft geometry, physical properties of rock, oil-water viscosity, gravity-pressure, matrix and fracture movable oil amount ratio, oil content distribution in matrix, matrix imbibition and fracture displacement characteristic time, imbibition intensity distribution and time process; (b) realizing the similarity criteria and a design method of model parameters; and (c) modeling an oil reservoir macroscopic physical model which meets the multiple similarities so as to comprehensively simulate and predict seepage characteristics and the development process of real fractured oil reservoir. A predictable physical simulation similarity criterion system for the fractured anisotropic oil reservoir is established, has comprehensive functions and is easy to realize.

The invention provides a calculating the plane heterogeneous decision coefficient and the longwise heterogeneous decision coefficient according to the flooding pressure loss curve, absorbing cross section, oil water well corresponding relation, oil water well production month data and drill electric side explanation data, and then: (1) determines the connection relation of the oil water well, namely the primary flow direction of the water in flooding well and the primary water supplying source of the producing well; (2) judges the necessity of block allotment; (3) selects the well needed to be allotted; (4) determines the blocking agent compound and the setting mode; (5) determines the allotting mode; (6) determines the dose of the blocking agent; (7) estimates the allotting effect.

In the method wherein a resist pattern is miniaturized effectively by applying a fine pattern forming material, the fine pattern forming material used for providing with a cured coated layer pattern, wherein development defects are reduced by water development is offered, wherein the fine pattern forming material comprises a water-soluble resin, a water-soluble crosslinking agent and water or a mixed solution consisting of water and a water-soluble organic solvent, and further comprises an amine compound.

A process for producing a water-developable printing plate for use in relief printing, comprising subjecting a solid plate made of a photosensitive resin composition including at least (a) a hydrophilic resin, (b) a hydrophobic resin, (c) a photopolymerizable unsaturated compound and (d) a photopolymerization initiator to at least an exposure step with actinic light, a development step and a post-exposure step, wherein the above described post-exposure step is carried out in a low oxygen concentration environment.

The invention relates to a tunnel construction method for crossing a karst water-rich section. The method is characterized by comprising the following steps of: step 1, when the tunnel construction isclose to the karst water-rich section, predicting the underground water development condition and stratum information by adopting an advanced geological prediction method; step 2, drilling a water detecting hole by adopting advanced horizontal hole drilling, and detecting the water inrush position, the water inrush amount and the water inrush pressure of the karst water-rich section through the water detecting hole; step 3, digging a tunnel face leading guide pit in the contour line of a tunnel according to the predicted water inrush position for drainage and pressure reduction, wherein the water inrush position is located on the side wall of the leading guide pit; step 4, grouting by adopting an advanced small conduit, carrying out advanced support on the tunnel to form a grouting ring for water isolation, and preventing underground water from flowing into surrounding rock in front of a tunnel face; and 5, excavating a tunnel body, plugging the water detecting hole, and excavating the tunnel body by controlled blasting. According to the tunnel construction method, the risk of water inrush on the tunnel face can be effectively reduced, and the tunnel construction safety is guaranteed.

The invention discloses an environment-friendly crosslinking and gelling retarding profile control agent and a preparation method thereof and belongs to the field of enhanced oil recovery technologies for oilfields. The profile control agent comprises a primary agent, i.e. hydrophobic association, a crosslinking agent, i.e. aluminum citrate, an antioxidant, i.e. sodium sulfite, and a retarding agent, i.e. sodium malate, and contains all the ingredients in percentage by weight: 0.1-0.4% of hydrophobic association, 0.01-0.02% of aluminum citrate, 0.015-0.025% of sodium sulfite, 0.005-0.020% of sodium malate and the balance of water. The profile control agent disclosed by the invention has the characteristics that the profile control agent is environment-friendly and is free of damage/injury to environments/human bodies; the crosslinking is retarded, and the gelling time is prolonged, thereby being beneficial to high-dose injection and deep profile control; the plugging rate is high; and the profile control agent has certain temperature-resistant and salt-tolerant performance and scouring resistance. The profile control agent can be used for adjusting a water absorption profile of a water-flood well and improving the water-flood development effect of oilfields.

The invention provides a method for improving the condensate oil recovery ratio through injecting water into a fracture-cave type carbonate condensate gas reservoir. The method comprises the following steps of: (1) reservoir type identification; (2) retrograde condensation and oil ring judgment; (3) study on the underground occurrence state of retrograde condensation oil; (4) indoor physical experiment analysis and study; (5) trial injection; (6) water injection; (7) well soaking; and (8) oil production. The method has the advantages that the technical storage and the favorable support are provided for the recovery ratio improvement through water injection development of the fracture-cave type carbonate condensate gas reservoir, and the recovery ratio is greatly improved.

The invention relates to a horizontal well dragging type liquid producing section testing tubular column which comprises an oil pipe and a sleeve. The oil pipe is located in the sleeve. The oil pipe and the sleeve pipe each comprise a horizontal segment and a vertical segment. The horizontal segment of the oil pipe is sequentially provided with a guide plug, a hole pipe, a producing section tester, a first communicating pipe and a second communicating pipe from the toe portion to the heel portion, and an oil well pump is arranged in the vertical segment of the oil pipe. The producing section tester is connected with a cable, and the cable is connected to well mouth equipment through a three-way guide pipe arranged at the bottom of the oil well pump in the vertical segment of the oil pipe. The horizontal segment of the sleeve is provided with a plurality of perforation segments. According to the testing tubular column, the producing section tester is pre-arranged in the oil pipe, the cable is dragged in the oil pipe to drive the producing section tester in the testing period to test the liquid producing amount and water content of different combined layer segments, the ground does not need to be manually measured, the cable transmits data in real time, the liquid producing amount and water content condition of each layer segment are analyzed in real time, liquid producing information of each producing layer segment of a horizontal well is known in time, and bases are provided for water-flooding development adjusting and later water plugging of the horizontal well.

The invention discloses a preparation method of a three-dimensional oil reservoir water-displacement simulation model and a real-time dynamic monitoring visualization device, and relates to the fieldof oilfield water-injection development experiments. According to the digital research result of an oil reservoir and the actual demand, a 3D printing technology is utilized to print a sand-filling model frame, an oil reservoir bottom face and an oil reservoir fault frame, sand with different grain sizes are used for filling, impermeable plastic films are used for replacing a partition layer and interlayer, plastic pipes are used for simulating oil production wells and water injection wells, thus a constructed three-dimensional real oil reservoir miniature model is used for a displacement experiment, and the oil and water motion states in the water injection experiment process under different well network conditions are simulated; and then resistivity measuring instruments are buried intothe three-dimensional oil reservoir water-displacement simulation model, oil and water dynamic visualization is achieved through resistivity values at different positions and in different time, the residual oil distribution law is determined, and the basis is provided for programming of a development scheme, potential tapping of residual oil and implementing of yield-increasing measures.

The invention discloses a local well pattern water injection development optimization method based on a graph neural network. The method specifically comprises the steps as follows: (1) obtaining geometrical information of a local target well pattern, and constructing a graph neural network structure of an injection-production well pattern according to the topological structure characteristics ofa water injection well and an oil production well; (2) acquiring historical production data of a target well pattern; (3) training the graph neural network structure in the step (1) by utilizing the historical production data in the step (2), and establishing a graph neural network model; and (4) performing sensitivity analysis on the parameters of the injection-production well pattern by utilizing the graph neural network model to obtain sensitivity factors in the injection-production well pattern. According to the method, the basis for adjusting the water injection amount is provided for water injection development, the oil production amount is predicted, meanwhile, the importance of different wells and different static parameters in each well pattern is given, and main influence wells and secondary influence well points are distinguished when the water injection amount is adjusted.

The invention relates to a preparation method of a healthy wine, and in particular relates to a preparation method of a tartary buckwheat wine with a function of reducing blood fat. The preparation method comprises the following steps of: 1, extracting a tartary buckwheat extracting solution; 2, carrying out vacuum concentration on the tartary buckwheat extracting solution; 3, separating the concentrated solution by an activated resin column; 4, top-washing the resin column by using pure water until effluent becomes clear from muddy; 5, eluting the resin column by using 40-65% alcohol, detecting an eluent by using an ammonia water development process, when test paper becomes yellow from colorless and then changes into colorless, stopping eluting, and collecting the eluent; 6, carrying out vacuum concentration on the eluent for recovering alcohol, vacuum-drying to obtain a dry extract with the flavonoid content of 40-85 percent; and 7, selecting white wine with an alcoholic strength of 25-68%vol, adding the dry extract, fully uniformly stirring, standing for 24-48h, and filtering to obtain the tartary buckwheat wine. The tartary buckwheat wine prepared by adopting the preparation method has the flavonoid content being not less than 100mg/L, is safe and nontoxic, and has the effect of assisting the reduction of the blood fat.

The invention discloses a water-developable chemistry-free thermosensitive board and a preparation method thereof. The water-developable chemistry-free thermosensitive board is environment-friendly, and by the water-developable chemistry-free thermosensitive board, cationic cross linking and free radical polymerization can be generated simultaneously. The technical problem that the water-developable capability and the pressing resistance of a chemistry-free thermosensitive CTP (computer-to-plate) board in the prior art is solved. The water-developable chemistry-free thermosensitive board comprises a supporting body, a thermosensitive layer and a protecting layer; and the thermosensitive layer comprises the following raw materials in part by weight: 30-70 parts of water-soluble thermo-crosslinking copolymers, 10-50 parts of performed polymers containing hydrophilic radicals, 10-30 parts of polyfunctional monomers, 1-20 parts of cationic initiators and 1-20 parts of infrared radiation absorption dyes. By the technical scheme, water development can be carried out directly after infrared laser scanning imaging is performed, imaging contrast is high, boards can be detected before being machined, and printing resistance is high.

The invention provides a polymer emulsion containing infrared absorption dye and a preparation method thereof, and particularly relates to a free radical polymerization method for preparing a photosensitive material containing infrared absorption dye thermosensitive emulsion. The polymer emulsion contains the following components by weight percentage: (1) 1-10% of an infrared absorption dye; (2) 10-40% of nanometer polymer microspheres; (3) 1-10% of an emulsifier; (4) 0.1-2% of an assistant emulsifier; and (5) 50-90% of deionized water. The polymer emulsion prepared by the method provided by the invention can be used for preparing a precursor of a coating liquid absorbing near-infrared light with wavelength of 700-1100 nm; the emulsion subjected to coating and drying can enable polymer to generate physical and chemical changes from the inside under effect of near infrared laser with wavelength at 700-1100 nm, leading to thermotropic phase change of the macro structure, and imaging can be generated after water development; the emulsion can be stably stored for a long time; and polymer coating effectively stabilizes the infrared absorption dye.

An organic electroluminescence device manufacturing method is disclosed wherein the device comprises a substrate, a first and second electrode, and an organic luminous layer. The method comprising: hardening of a water development type photosensitive resin to form a plastic plate; and printing organic luminescent ink on a substrate by relief printing method with the use of the plastic plate, wherein the organic luminescent ink is an ink capable of scattering organic luminescent material in an organic solvent.

The invention discloses a new polymer blue-ray engraving material, which consists of aqueous solution of modified SBQ (special bar quality) resin, epoxy resin, a curing agent, a photo polymerization initiator and the like. Organosilicon modified polyurethane is adopted to generate synergy with a colloid, and the acid and alkali resistance of a film is improved; and vinyl acetate and acrylate copolymer is introduced and is coordinated with long-chain ester monomers, multi-functional active monomers and modified polyurethane to form an interpenetrating network/semi-interpenetrating network, so that the mechanical properties of the film are obviously improved, the chemical resistance and mechanical wear resistance of photoresists are improved and the adhesion of the photoresists to a base material is improved. Without action of chromium ions, the new polymer blue-ray engraving material has high photosensitivity to blue-ray laser dotting instant exposure, good cross-linking curing performance, and the water development fastness meeting the engraving requirement, has good printing fastness after high-temperature curing, and has good application prospect.

The invention relates to a photosensitive water-developable resistance welding composition composed of phthalic anhydride half-ester modified formaldehyde epoxy acrylate, phenyl triphenol diacrylate, anhydride half-ester, novolac epoxy resin sebacic monoester, a photoinitiator, a coloring agent, a plasticizer, inorganic filler, a leveling defoamer, a coupling agent, an emulsifying agent, a polymerization inhibitor and the balance of water. The phthalic anhydride half-ester modified formaldehyde epoxy acrylate can provide water solubility, water development property, good film forming property and contact drying property, so that the photosensitive water-developable resistance welding composition has higher adhesion force when applied to the preparation of a printed circuit board resistance welding diagram. The invention also provides a photosensitive water-developable resistance welding dry film prepared by using the photosensitive water-developable resistance welding composition.

The invention provides a sand filling tube combination device for simulating a fractured reservoir. The sand filling tube combination device comprises a sand filling tube which is formed by sealing at least one section of cylindrical barrel and flange plates at the two ends of the cylindrical barrel; outer interfaces are formed at the circle center positions of the flange plates at the two ends; the outer interfaces are connected with connecting pipes through connecting elements in a sealed way; the cylindrical barrel or the connecting pipes at the two ends of the flange plates of the sand filling tube are connected with one or more capillary tubes through diameter-variable joints. By the sand filling tube combination device for simulating the fractured reservoir, fractures in different sizes are simulated by the capillary tubes with different diameters, the stratum conditions of the fractured reservoir can be simulated very well, and the fractures at the positions different from the position of a water injection wellhead can be simulated by setting the positions of the capillary tubes; in the water injection development process of a natural fractured reservoir, the sand filing tube combination device has important guiding significance to determine a reasonable water injection mode and a reasonable water injection pressure and delay directional water channeling and flooding speed of an oil well.

The invention belongs to the technical field of oilfield development, and particularly relates to an effectiveness evaluation method for oil producing water injection development. Two parameters of effective declining rate and effective coefficient are introduced, and the effectiveness evaluation method comprises the steps: target oil producing wells, production time nodes needing to quantifying effectiveness and the actual production yield under the time nodes are determined; standard wells are selected; the standard declining rate is calculated; the effective theoretical yield of the targetoil producing wells is calculated; and the effective coefficient of the target oil producing wells is calculated. According to the effectiveness evaluation method, the defects that a traditional method can only conduct qualitative judgment of good or bad effectiveness on one single oil producing well and cannot conducts further effective degree evaluation on a whole oil reservoir are overcome, theeffectiveness of one single well and the whole oil reservoir in different production periods can be quickly quantified, and a foundation is laid for further oil reservoir research.

The invention discloses a single-component water-emulsion type rotary screen stenciling sensitive material which comprises the following raw materials by weight percent: 20-45 percent of modified SBQ resin water solution, 10-30 percent of crylic acid modified epoxy resin, 0.5-4 percent of hyperbranched polyester resin, 2-5 percent of polyvinyl unsaturated compound, 2-4 percent of blocked isocyanate compound, 1-2 percent of photopolymerization initiator, 0.001-0.5 percent of antioxidant and stabilizing agent as well as 15-60 percent of water. The invention has the advantages that in the using process, no toxic and harmful gases and no heavy metal ion waste liquid are discharged; matters, such as bichromate, and the like are not adopted as photosensitizer, any matters are unnecessary to be added before use, and the water development firmness of the material can satisfy the requirements of fine patterns; residues after being used can be also recycled, and the material has good waterproofness, high chemical abrasion resistance and wide using prospect; the hyperbranched polyester resin is adopted as heat curing agent of epoxy resin, and the invention is successfully applied to light-sensitive stenciling material.

The invention provides a method for developing hot dry rock geothermal resources through using a gravity drainage technology. The method comprises the three steps of injection-production well design and well drilling, inter-well fracturing communication and high-pressure water injection production. In the well drilling stage, vertical fracturing and longitudinal communication are carried out on anupper horizontal well and a lower horizontal well which are parallel to each other, so that the upper injection-production horizontal well and the lower injection-production horizontal well meet therequirements of flow communication and pressure communication; in the production stage, low-temperature water is injected into an upper injection well and then subjected to sufficient heat exchange with a stratum, so that high-temperature water is extracted from a lower production well, extracted heat energy is comprehensively utilized for power generation and the like, and the treated water is circularly injected back into a dry hot rock stratum. According to the technical scheme, the gravity settling principle and a method for improving the heat exchange efficiency through crack auxiliary fluid flowing are combined, and the development efficiency of the hot dry rock geothermal resources can be greatly improved.

The invention discloses a whole well pattern water injection development optimization method based on deep learning and a graph theory. The whole well pattern water injection development optimizationmethod specifically comprises the steps of (1) obtaining the geometric information of a whole injection-production target well pattern, and constructing a deep convolutional neural network structure;(2) dividing by taking a single five-point injection-production well pattern as a basic unit according to a position relationship between a water injection well and a production well of the whole injection-production well pattern, and converging a directed graph by taking five-point dots of the basic unit; (3) acquiring historical production data of the target well pattern, selecting 60% of the historical production data as a training set, and taking the remaining 40% as a verification set; and (4) performing iterative training verification on the convolutional neural network structure by using historical production data, and establishing a convolutional neural network model applied to whole well pattern water injection development optimization. The influence of the water injection amounton the oil production amount can be obtained in continuous model training, and meanwhile, the optimal water injection amount range is obtained, so that a scientific basis is provided for adjusting water injection parameters of a water injection well and effectively improving the oil production efficiency of an oil production well.