1695 results about "Water cut" patented technology

An apparatus is provided that determines a characteristic of a multiphase fluid, such as an aerated oil and water fluid, flowing within a pipe. The apparatus includes a fluid flow meter, a water cut meter, and a density meter, wherein the density meter determines the density of the fluid flow to determine the gas volume (or void) fraction of the multiphase fluid flow. The output signal of each of the meters is provided to a multiphase flow model to provide a plurality of multiphase parameters, such as phase fraction, volumetric flow, mass flow of each of the phases of the multiphase mixture, optimized for various flow conditions. Each of the meters may be secured to the outer surface of the pipe using various means, such a clamping means.

The invention discloses a method for preparing functional composite microsphere with a multi-layer core-shell structure and application thereof, and relates to the technical fields of functional macromolecular microsphere preparation and petroleum exploitation, in particular to the technical field of deep profile control water shutoff during high water-cut period of petroleum exploitation. The functional composite microsphere is prepared by a dispersion polymerization method which comprises the following steps: forming a core part by polymerization of a styrene monomer, and forming a cation shell part by copolymerization of acrylamide, the cation monomer and a crosslinking agent; and forming an anion shell part by copolymerization of acrylamide, anion monomer and the crosslinking agent. The functional composite microsphere is characterized in that the size of the microsphere is between 1,500 and 2,000nm and the microsphere is white solid powder or polymer emulsion; the expansion multiplying power of the microsphere is improved by 20 to 50 times after 5-day hydration; and therefore, the functional composite microsphere can be used for effective plugging at the pore throat of a bottom high permeability zone during high water-cut period of the petroleum exploitation.

The invention provides a GIS-based underground pipeline operation and maintenance system. The GIS-based underground pipeline operation and maintenance system comprises a map management sub-system, a pipe network facility management sub-system, a pipe network analysis sub-system, a pipe network maintenance sub-system, a system management sub-system, a WEBGIS pipe network figure publishing sub-system and a system database; the GIS-based underground pipeline operation and maintenance system is established on the basis of a dynamic and static water supply pipe network electronic map, performs attribute query, location, analysis and statistics of pipelines and various facilities, and outputs all kinds of statistical results; after a pipe network accident happens, a valve closing scheme and a user water cut-off notice can be provided within a short time; the scheme can be rapidly adjusted after a new condition happens; graphic and character integrated modern management of a water supply pipe network is realized; a dynamic updating mechanism of pipe network data is provided; the system is accurate and high-efficient; powerful scientific decision basis is provided for water supply planning, designing, dispatching, emergency maintenance and atlas data management; the full-computer operation process for analyzing and deciding is realized; and thus, the production efficiency and the social service level of a running-water company are increased.

Multiphase flow measurement in extreme environments such as subsea or in-well is a difficult task for many reasons including reliability, survivability, and longevity issues; accessibility to the equipment; and complexity of the varying flow field as a function of position and time. Embodiments of the present invention provide techniques and apparatus for performing subsea multiphase flow measurement by combining two technologies. One is based on infrared water-cut measurement technology which is capable of measuring water and oil concentrations in multiphase flow with up to 99.5% gas volume fractions. The second technology is based on in-well fiber-optic flow measurement capable of resolving gas and total liquid flow through the measurements of flow velocity, fluid mixture speed of sound, and absolute pressure and temperature at meter location. This hybrid system represents an approach to subsea multiphase metering that may offer advantages compared to traditional systems for some applications.

The present invention includes a method for inhibiting hydrate formation blockage in a flow line used to transport hydrocarbon containing fluids. Water is added to a hydrocarbon containing fluid to produce a water cut enhanced hydrocarbon containing fluid. Salt may be added to the hydrocarbon containing fluids as well. Hydrate formation blockage is inhibited from forming within the flow line by the addition of the water and / or the salt. Sufficient water may be added such that the hydrocarbon containing fluid is converted from a water in oil emulsion to a water continuous emulsion. A system for preventing the formation of hydrate blockage in conduits is also provided. The system includes a flow line for transporting a hydrocarbon containing fluid and a water injection conduit fluidly connected to the flow line to add water to the flow line to increase the water cut of a hydrocarbon containing fluid flowing through the flow line. A salt dispenser may also be included which is used to increase the salinity of the hydrocarbon containing fluid. The system may further include a water separator to separate hydrocarbons from water which receives fluids from the flow line. The flow line, water separator and water injection conduit may cooperate to form a loop wherein water from the flow line may be separated by the water separator and a portion of the separated water is delivered back to the water injection conduit to be reinjected into the flow line.

The invention relates to the field of high-speed railway pier construction, in particular to a pile head ring incision machine for a high-speed railway bearing platform. The pile head ring incision machine comprises a machine body, a ring incision device and a bent terminal. The machine body comprises a front machine frame and a rear machine frame. The front machine frame and the rear machine frame each comprise a pair of struts, a pair of moving table screws, a bottom connecting plate, a top connecting plate, a moving table and a supporting sliding table. The ring incision device comprises a turntable, a turntable gear, a knife cutting device and a water cutting device. The bent terminal comprises a fixed position supporting rod, a bent guide wheel, a rope winding wheel, a rope winding motor, an embedded head block, a capturing head and a steel wire rope. The machine body can wrap a pile head in a half-and-half rotation mode. The ring incision device can perform rotary motion to use a cutting knife to cut open part of the pile head, and water cutting is utilized to completely cut open the pile head. The bent terminal is used for bending steel bars in the pile head. The pile head ring incision machine automatically treats the pile head, manpower is saved, dust is prevented from being sucked into the body, health is ensured, environmental pollution is alleviated, and the pile head ring incision machine is convenient to operate.

An improved method for the manufacture of a solid disc rotor and / or rotor segment for a single disk refiner, double disk refiner, multi-disk refiner, single cone refiner, or a double cone refiner. The invention comprises a plurality of blades spaced apart by recessed locations of a base plate. Either a water jet milling machine or a horizontal gang mill or both may be used. The blades comprise appropriately dimensioned cold rolled and cryogenically stabilized stainless steel or other appropriate stock of the appropriate hardness required by the application. The blades fit into respective locations in the base. The invention is further characterized by a continuous laser weld (85) along either side of each respective blade at its junction with the base, a variety of possible blade and base materials, and the use of one or more of cryogenic treatment, water cut jetting and water jet milling technologies.

The invention discloses an intelligent rubber tapping system for a rubber tree and a control method thereof. The rubber tapping system comprises a moving vehicle frame, an image acquisition module, ahigh pressure water cutting module, a control module and a data processing module; the method comprises the steps that the control module controls the moving vehicle frame to the portion under the rubber tree not subjected to rubber tapping and controls the high pressure water cutting module to perform rubber tapping on the rubber tree. Compared with the prior art, the intelligent rubber tapping system and method for the rubber tree have the advantages that the power dissipation is low, transmission is accurate, the anti-interference performance is high, the rubber tapping system is convenientto control, efficient and practical, achieves stable and controllable rubber tapping with the best mode, and replaces manpower with a robot to work in the optimum time quantum, monitoring and automatic control functions are added on the basis of rubber tapping, it is achieved that the dynamic condition of the rubber tree is grasped all-directionally, the manual input cost is reduced, the production efficiency is improved, and the promotion and use value is better.

The invention belongs to the technical field of oil exploitation and particularly relates to a calculation method for predicating recovery percentage and water cut of an oil field. The method for predicting the recovery percentage and water cut of the oil field comprises the following steps of: (1) obtaining a water-oil mass ratio: Qw / Qo, i.e. Fg; (2) obtaining the initial oil saturation: Soi; (3) testing the irreducible water saturation: Swi; (4) obtaining a crude oil volume factor Bo; (5) putting the above parameters into a formula as shown in the specification so as to obtain a relationship between the water cut and the recovery percentage. According to the method for predicting the recovery percentage and water cut of the oil field provided by the invention, a universal method applicable to water-flooding development of reservoirs with high-permeability, low-permeability and ultra-low permeability is obtained, and the actual changing rule of the water cut and recovery percentage of reservoirs and the percolation characteristic representation of the oil reservoirs of different types can be reflected, therefore the method is fit for the practical situation better; furthermore, the development index prediction precision can be improved, therefore the method has an important practical significance on the production practice of the oil fields.

An extremely high water cut oil-gas-water three phase flow water removing device, which includes a mist eliminator (8), a fluid rectifier (7), a liquid collection chamber (2), a fluid directing duct (5), an inlet connection pipe section (10), a gas outlet connection pipe section (9), a mixture liquid exit connection pipe section (4), a free water outlet connection pipe section (1). Its function is to effectively remove most of the free water from the high water cut oil-air-water three phase flow mixture liquid. An extremely high water cut oil-air-water three phase flow measurement apparatus and a measurement method using the water removing device are also disclosed.

The invention relates to a CO2 (carbon oxide) huff-n-puff, water control and oil increment method for a horizontal oil well, which includes: using a process string to inject appropriate CO2 into an abnormally water flooded horizontal well with proper conditions (the abnormally water flooded horizontal well refers to an extra-high-water-cut well with a recovery percentage lower than 80% of a calibrated water displacement rate and water cut incompatible with the recovery percentage); shutting down (shutting in) the well for a certain period of time to enable the injected CO2, an oil reservoir and reservoir fluids to physically and chemically react, and accordingly swelling and thinning crude oil and reducing surface tension; carbonating water to thicken the water; and energizing the reservoir, improving permeability and the like. By means of production control after well startup, evident water-cut reduction and evident oil yield increase can be achieved for the abnormally water-flooded extra-high-water-cut horizontal wells (including high-inclination wells with deviation angles larger of from 45 DEG to 86 DEG, and water control and oil increment are achieved.

An immersion probe is described that includes sensing elements that allow for hydrate inhibitor dosage to be more efficiently provided into gas and / or oil wells. The immersion probe allows for detection of first appearance of water in a multiphase flow in a well, measuring the amount of inhibitor in water within the well, determining an accurate water-cut, and measuring other property such as water salinity. Accordingly, with the known water-cut, salinity and the water flow rate inferred from the inhibitor injection flow rate and inhibitor-in-water fraction, a correct dosage of the inhibitor can be injected to the well in order to prevent hydrate formation, while reducing overdosing. Water flow rate may also be inferred from an independently measured liquid flow rate and the immersion-probe measured water cut.

The invention discloses a cement-formation interface maintenance and cementation quality evaluation device and method under formation water disturbance. The device comprises a kettle body, an injection pump, an annular pressure pump, a pressure pump and a heating control device, wherein a rubber jacket and a ring-shaped rock core are arranged inside the kettle body, an upper sealing head and a lower sealing head seal the two ends of the kettle body, a leather bag is fixed in the internal cylinder of the upper sealing head and used for simulating pressure of the upper part of cement paste, a shallow groove is formed in the center of the lower sealing head, a gasket is arranged in the lower sealing head, a water inlet and a water outlet are formed in the side surface of the kettle body, formation water enters the rock core through the water inlet by virtue of the injection pump and flows out by virtue of the water outlet, and flowing of the formation water in the ring-shaped rock core isrealized. The device disclosed by the invention can simulate an underground high temperature environment, an annular mud cake is formed on the inner wall of the ring-shaped rock core, interference and destruction of disturbance of the formation water in a high water-cut period during later period of oil field water flooding development are studied, influence of annular pressure difference on cement-formation interface cementation quality also can be studied, and shear strength and hydraulic cementation strength of a cement-formation interface can be determined accurately.

The invention relates to a ground condcutive water cut analyzer for measuring water cut in oilfield export liquor. It is characterized by that the described analyzer includes an electric conductance sensor, excitation source generation circuit, voltage differential signal detection and voltage / frequency signal covnersion circuit. The described electric conductance sensor is formed from insulating tube, ring excitation, electrode mounted on the inner wall of insulating tube and ring measurnig electrode. Under the action of excitationsource generation circuit the excitation electrode can provide alternating current with constant magneitude, and under the action of voltage / frequency converter the pressure-different signal inputted by measuring electrode can be converted into frequency signal and outputted, then passed through power amplifier and transferred into secondary meter. Its measurement accuracy is high, repeatability and good consistency.

The invention relates to a method for analyzing the heterogeneous property of an oil reservoir. The method comprises the following steps that 1, water injection parameters of a water injection well are collected, and a relative apparent water injectivity index Xi reflecting the water absorbing capacity of the oil reservoir is obtained; 2, the water injection intensity of each layer of a water absorbing profile of the water injection well is collected, and a water absorbing profile Lorentz coefficient Vi reflecting the heterogeneous property of the water absorbing profile of the water injection well is obtained through the Lorentz coefficient method; 3, fluid producing parameters of an oil well are collected, and a fluid producing intensity Lorentz coefficient Yi reflecting the fluid producing intensity of the oil well is obtained through the Lorentz coefficient method; 4, water cut rising parameters of the oil well are collected, and a well group water cut rising variable coefficient Wi reflecting the water cut rising differences of the oil well is obtained; 5, the fluid producing intensity of each layer of a production profile of the oil well is collected, and a production profile Lorentz coefficient Zi reflecting the heterogeneous property of the production profile of the oil well is obtained through the Lorentz coefficient method; and 6, a fuzzy decision-making evaluation model is built, and a comprehensive decision-making factor Fi is obtained. According to the method for analyzing the heterogeneous property of the oil reservoir, the heterogeneous property of the oil reservoir is quantified, and bases are provided for development and adjustment of oil fields.

Methods and systems for determining the amount of water in a high water cut crude petroleum flow stream exiting from a hydrocarbon well. Electrical property measurements such as permittivity measurements are collected with a microwave analyzer system as high water cut oil exits from a well. Collection is continued until the span of the measurements of at least one property reaches at least a characteristic pre-determined value. A heuristic salinity of the water phase of the crude oil can then be determined based on the span statistics and reference equations and / or reference data. The flow-weighted average water content of the oil can then be determined using the heuristic salinity to correct for salinity variation as the output of the well changes over time.

The invention provides a similar limit water cut period take-turn water drive method for a multi-layer sandstone reservoir. The method includes the steps that a geological model based on single-cause sand bodies is established; on the basis that the geological model based on the single-cause sand bodies is established, a remaining oil distribution model based on the single-cause sand bodies is established; the single-cause sand bodies similar in property are combined into cause sand body sets; according to the reservoir characteristics of different single-cause sand body sets in a layer system and the remaining oil distribution conditions, the corresponding vectorization water drive adjustment scheme is determined; take-turn water drive based on the single-cause sand body sets is performed. With the similar limit water cut period take-turn water drive method for the multi-layer sandstone reservoir, influences of the heterogeneity of reservoir stratums of the multi-layer sandstone reservoir on water drive development can be reduced to the maximum, comprehensive displacement and balance displacement in a plane in the longitudinal direction of the single-cause sand bodies are achieved, and therefore a high-strength and high-efficiency water driving flow field can be established, and water drive sweep efficiency and water drive recovery efficiency can be improved substantially.

A closed loop system for the calibration of a multiphase meter, such as a multiphase flow meter or water cut meter, and a method of employing the system in calibration of multiphase meters in crude oil production processes. The system includes an oil and water separation vessel, oil and water flow meters, valves, pumps, and a single phase calibration unit. The system employs a two-step calibration process. First internal single phase oil and water meters are calibrated using the single phase calibration unit; subsequently multiphase meter calibration is achieved using the two precalibrated single phase flow meters.

The invention relates to a crude oil demulsifier and a preparation method thereof. The components of the demulsifier include fatty amide, cationic surfactant, organic solvent and water. The invention also provides a preparation method of the crude oil demulsifier. After the use of the demulsifier, the water content in the crude oil (mg / L) is greatly reduced, and the oil-water boundary is clear.

A software-based water level monitoring and control system, preferably for use with conventional steam boilers, is disclosed. The system includes software for monitoring and recording system functions, safety features, diagnostic testing histories, and other functions. The water level system is employed to monitor and / or regulate one or more operating parameters of the boiler, such as water levels within the boiler. In response to the boiler system testing of low-water cut-off, auxillary low-water cut-off, and pressure vessel float operation and functionality, the software builds histories and other data compilations. The extensive electronic information permits a user that accesses the water level control system to, for example, view the data compilations and to monitor the status of the system. In this manner, real-time information, as well as the historical data, are available to accomplish the regulation of key parameters in the boiler.

The invention provides a water flooding oil reservoir fireflood production well selective water controlling and channelling sealing method. The method comprises the steps that a gas channelling preferential migration pathway is sealed and blocked using a channelling sealing agent; and high water-cut preferential migration pathways near an oil well are selectively sealed and blocked. The channelling sealing agent comprises an alkali-resistant surfactant foaming agent and an auxiliary alkaline reducing agent; and the alkali-resistant surfactant foaming agent is selected from one or more of sodium lauryl sulfate, fatty alcohol polyoxyethylene ether sodium sulfate, rosin soap materials, animal and vegetable protein materials, papermaking black liquor and the like, and the auxiliary alkaline reducing agent is sodium oxalate. The water flooding oil reservoir fireflood production well selective water controlling and channelling sealing method is a selective water controlling and channelling sealing integrated technology.

A low-water cut-off system [A] determines if fluid [W] within a boiler or other enclosure drops below a predetermined level within the enclosure. A signal generator introduces a signal into the enclosure so that the signal is present for sensing at the predetermined level, where a probe is provided for sensing the signal if present as occurs if the water is at the predetermined level. A control, which includes a microcontroller, is responsive to the probe for providing a control function in response to whether the signal is so sensed by the probe, and so to determine if water has dropped below the predetermined level. The function may be causing alarm signalling or boiler heating cut-off. Self-test and time delay features are also included. Provision is made so that the control compensates for variation in electrical conductivity of the water through which the probe signal is sent, including circuitry to adjust for a wide range of possible purity levels. Provision is included such that the low water cut-off system is fault tolerant no matter at what water purity it is adjusted to operate.

The invention provides a method for predicting the crude oil production ratio of a water-drive oil reservoir. The method comprises the following steps that the oil field production history is divided into a plurality of development stages according to the data point form of the actual oil field cumulative water output and cumulative oil output which are distributed according to an A type water-drive characteristic curve; relations, of the water cut and the recovery degree, containing production parameters in the corresponding development stages are separately established, wherein the production parameters in the corresponding development stages comprise the initial water cut, the initial recovery degree, the economic limit water cut and the prediction crude oil production ratio under the condition of the economic limit water cut; and the crude oil production ratio is predicted according to the relations of the water cut and the recovery degree in all the development stages. By adoption of the method for predicting the crude oil production ration of the water-drive oil reservoir, the variation conditions of the water cut and the recovery degree in all the development stages can be more reasonably reflected, and accordingly the crude oil production ration is effectively predicted.

The invention provides an oil reservoir numerical simulation method and apparatus based on high water-cut period monitoring data constraints. The oil reservoir numerical simulation method includes acquiring the data of a production well, an injection well and an oil reservoir, and determining the dynamic parameters and static parameters of the wells and the oil reservoir; generating water logging three dimensional characteristics at different time based on the logging interpretation data in the static parameters; generating the residual oil distribution rules at different time based on the inspection well coring data in the dynamic parameters; establishing a geological model based on the static parameters of the oil reservoir, and initializing the geological model based on the original formation pressure distribution or the relation of pressure and depth, and rock and fluid properties; historically matching the initialized geological model to generate a history matching result; and historically matching the oil reservoir numerical simulation based on the water logging three dimensional characteristics, the residual oil distribution rules, and the history matching result. The oil reservoir with different water logging and residual oil distribution characteristics at the high water-cut stage is numerically simulated in high precision.

A backwater control system of hydraulic cutting machine is composed of water nozzle, sand nozzle, mixing cavity between the said two nozzles and connected to sand delivering pipe, and a high-pressure water generator system having a boosting unit and a high-pressure water accumulator connected to the said water nozzle. It features that a by-pass channel communicated with the said mixing cavity is used for discharging the backwater via a normally opened valve. Its advantages are simple structure and low cost.

The invention belongs to the field of workover operations, and particularly relates to a degradable temporary plugging agent for workover and a preparation method thereof. The degradable temporary plugging agent comprises the following components in parts by mass: 5-7% of acrylic acid, 15-21% of acrylamide, 5-15% of inorganic mineral soil, 0.002-0.005% of a polymerization inhibitor, 6-12% of a degradation promoter, 0.02-0.1% of a crosslinking agent, 0.6-1.0% of an initiator, 7-10% of corn flour and the balance of water. The degradable temporary plugging agent for workover disclosed by the invention has good degradation performance and does not need to add an additional degradation process; for high-water cut oil wells, water wells and the like, the degradable temporary plugging agent can be degraded by itself and resume operation and production only under the condition of a reservoir (under the condition of 90 DEG C, the 48-hour degradation rate can reach more than 90%).