30results about How to "Oil increasing effect is obvious" patented technology

The invention relates to a method for injecting oil displacing agent into an oil reservoir to improve oil recovery by using fracturing. The method for injecting the oil displacing agent into the oil reservoir to improving oil recovery by using fracturing mainly solves the problems of large viscosity loss and low injection efficiency during the injection process of the existing three kinds of oil reservoir oil displacement agents. The method for injecting the oil displacing agent into oil reservoir to improving oil recovery by using fracturing is characterized in that (1) dividing a target stratum to the well fracturing section; (2) determining a half fracture length for the well fracturing section of the target stratum; (3) determining the oil displacement agent dosage for the well fracturing section of the target stratum; (4) determining a construction displacement the well fracturing section; (5) determining construction procedure of a pumping injection; and (6) mixing and injecting the oil displacement agent. The method for injecting the oil displacing agent into oil reservoir to improving oil recovery by using fracturing can greatly improve the injection efficiency and reduce the displacement efficiency loss, thus greatly improve the recovery efficiency and single well production.

The invention relates to an ultrasonic blockage removal technology and a blockage removal device which are used for clearing blockages formed in an oil well during oil extraction. The device is mainly composed of a well testing truck, a transmission cable, a high-power ultrasonic electric signal transmitter and an ultrasonic electro-acoustic transducer. High-power pulse electric oscillation signals generated by the vehicle-mounted high-power ultrasonic transmitter on the ground are transmitted to the piezoelectric ceramic electro-acoustic transducer on an oil layer through the special transmission cable, then converted into ultrasonic waves through the electro-acoustic transducer, and injected into an oil bearing formation, so that the physical property and flow state of fluid in the oil layer are changed, the circulating condition and permeability of the bottom of the well and a near-well oil layer are improved, blockages are removed, scale prevention and removal are achieved, paraffin control is achieved, oil production capacity is improved, the viscosity of crude oil is reduced, and then permeability and recovery efficiency can be improved, injection rate is increased, and injection allocation is achieved.

The invention discloses a multifunctional thickened oil treating agent and a preparation method thereof. The treating agent is prepared from, by weight, 15.35%-17.65% of octanol polyoxyethylene ether, 13.37%-15.54% of lauroyl diethanolamide, 12.66%-15.74% of sodium dodecyl benzene sulfonate, 21.53%-24.57% of odium nonylphenol polyoxyethylene ether sulfate, 8.62%-11.87% of fatty acid methyl ester ethoxylate sodium sulfonate, 0.005%-0.006% of cocamidopropyl betaine, 0.005%-0.006% of cocamidopropyl dimethylamine oxide, 10.00%-15.00% of n-butyl alcohol, 0.001%-0.002% of vitamin A, 0.001%-0.002% of vitamin C and 6.566%-9.037% of water. The multifunctional thickened oil treating agent is an active agent product developed on the basis of tertiary oil recovery and used for increasing the recovery efficiency of an oil field, and the agent is a chemical assistant integrating oil well profile control and displacement, viscosity reduction and coagulation reduction, oil well cleaning and plug removal, and is good in production increasing effect on thickened oil recovery; the advantages of being good in thickened oil recovery oil output increase effect and treatment performance and wide in application range are achieved, and the yield increasing and effect improving functions on multiple kinds of thickened oil and high-viscosity and hypercoagulable oil wells can be achieved by adjusting the formula.

The invention discloses a multi-round polymer gel deep fine profile control method. According to the method, slugs having different functions are injected in multiple rounds, so that deep profile control can be realized. According to the functions of the slugs in deep profile control, the slugs are classified into four types: the I slug which is a gel flow-guiding agent capable of guiding gel and makes preparations to make the gel enter the stratum; the II slug which is the weak gel for assisting the blocking, effectively connects the gel flow-guiding agent and medium and strong gel, and guarantees that the fluid can effectively and continuously enter the stratum; the III slug which is the medium and strong gel used for medium and deep blocking; and the IV slug which is weak gel used for disturbing flows. During a using process, the I, II and III slugs are injected as required in the first round; the II and III slugs are repeatedly used in the second (third) round; the next injection round is performed after injection requirements are met according to pressure and working parameters; and the IV slug is injected in the last round. The method is more targeted as the slugs are finely injected in multiple rounds, a longer responding period is achieved, the water absorption status of a reservoir is effectively improved, the utilization rate of injected water is improved, the swept volume is enlarged, and finally the oil displacement efficiency is improved. The method has an obvious oil increasing effect, is simple and easy to carry out, is suitable for filed construction, and is especially suitable for wells which have multiple small layers to be explored, are large in interlayer difference, and have high water content; the profile control success rate can be improved to be 90%; the validity period can be prolonged by one year or two years; and the method has a wide popularization and application prospect.

The invention provides a high-temperature microemulsion cleanup additive used for fracturing, and a preparation method thereof. The preparation method comprises the following steps: 1, adding 10-20 parts by mass of water into a reactor, adding 40-60 parts by mass of a cosurfactant to water, and stirring the cosurfactant and water at room temperature until the cosurfactant is completely dissolved; and 2, sequentially adding 20-40 parts by mass of a gemini surfactant and 3-4 parts by mass of a nonionic surfactant into the reactor, supplementing water to the reactor until the mass part number of a mixture obtained in the reactor is 100, and uniformly stirring the mixture at room temperature to obtain the high-temperature microemulsion cleanup additive. The high-temperature microemulsion cleanup additive is directly added to a fracturing fluid or an acidifying liquid according to a mass ratio of 0.1-0.3:100 when used.

The invention discloses a temperature-controlled liquid swellable rubber, which contains (by weight), polyether glycol 30 to 60 percent, toluene diisocyanate 5 to 40 percent, unsaturated resin 2 to 30 percent, phenol-formaldehyde resin 2 to 30 percent, natural rubber 2 to 20 percent, catalyst 0.01 to 3 percent, reaction temperature controlling agent 5 to 40 percent, solvent 2 to 30 percent, plasticizer 2 to 10 percent, thermal stabilizer 0.5 to 2 percent, and foam regulator 0.5 to 2 percent. The preparation method comprises the following steps: adding polyether glycol into a reaction kettle at the weight percentage of 30 to 60 percent, heating to 120 DEG C, dehydrating for 30 min, cooling to 45 DEG C, adding toluene diisocyanate 5 to 40 percent, heating to 80 DEG C to 95 DEG C, keeping the temperature for 1.5 to 4 hr, cooling to 45 DEG C, adding the solvent 2 to 30 percent, adding reaction temperature controlling agent 5 to 40 percent and catalyst 0.01 to 3 percent into the reaction kettle, heating to a reaction control temperature 60 to 95 DEG C, keeping the temperature for 4 to 8hr, cooling to 45 DEG C, adding the plasticizer 2 to 10 percent, unsaturated resin 2 to 30 percent, phenol-formaldehyde resin 2 to 30 percent, natural rubber 2 to 20 percent, thermal stabilizer 0.5 to 2 percent, and foam regulator 0.5 to 2 percent, stirring for 0.5 to 1 hr, discharging, and packaging to obtain the product.

The invention relates to an organic six-prevention-effect rodless hydraulic driving double-action reciprocating pump integrating corrosion prevention, scale prevention, wax prevention, viscosity prevention, gas prevention and sand prevention, and belongs to the new field of a mechanical oil production technology. The reciprocating pump consists of organic components of a reversing valve assembly, a hydraulic cylinder assembly and a liquid discharging cylinder assembly wich are connected in series by an upper male and female buckle joint, a lower joint and a fixed valve integral valve from top to bottom, wherein a sand removing and gas prevention device is selectively arranged under the lower joint and the fixed valve integral valve; and the hydraulic cylinder assembly and the liquid discharging cylinder can be connected in series and optimally combined into a single-driving single-discharging or single-driving multi-discharging or multi-driving single-discharging or multi-driving and multi-discharging hydraulic driving and discharging device according to different well depths, pressure and liquid discharging requirements. The pump has the obvious oil increase effect and various efficiencies including corrosion prevention, scale prevention, wax prevention, viscosity prevention, gas prevention and sand prevention, and is suitable for being popularized and applied in scales.

The invention relates to a crude oil surface active agent as well as a preparation method and an application thereof. The crude oil surface active agent comprises the following components in percentage by weight under an alkali-free condition: 1%-2% of fatty acid diethanol amide, 5%-10% of polyoxyethylene fatty acid amide, 10%-20% of heptadecyl dimethyl betaine and the balance of water, wherein the compounding weight ratio of the polyoxyethylene fatty acid amide to the heptadecyl dimethyl betaine is 1:2. A surface active agent compound system can form the ultra-low interfacial tension of 10<-3>-10<-4> mN/m with stratum dewatered crude oil at 45 DEG C when the use concentration is 0.0075%-0.01% under the alkali-free condition. In addition, the surface active agent compound system is less influenced by stratum water salinity, achieves the adsorption quantity on three oil sands of in the Liaohe oilfield Hainan less than 0.5 mg/g, is suitable for a mono-system flooding or binary system flooding technology adopted in the middle and later period of the waterflooding development of an oil deposit and provides certain technical support for the tertiary oil recovery of an oilfield.

The invention relates to an inoculum active protectant used in a highly mineralized oil well in biological process for oil production, wherein inorganic salt containing K<+>, Na<+>, Mg<2+> and Mn<2+> is dissolved to form inorganic salt mixed solution. The invention has the advantages that: (1) the mixed solution which is formed through mixing the protectant with composite microbial inoculum is injected into the oil well, thereby not only improving the mineralization resistant capability of microorganism to ensure the normal growth of the composite microbial inoculum under highly mineralized conditions, but also having an action on crude oil to increase the recovery ratio of the crude oil; (2) the protectant has low cost and does not increase recovery cost when substantially increasing recovery ratio; (3) with the essential component being inorganic salts existing in nature, the protectant does not cause great influence on the environment when added in substrate; (4) the protectant can ensure effective development and utilization of national highly mineralized oil wells so as to obtain considerable economic benefit.

The invention provides an in-depth profile control channeling sealing agent and a preparation method and an application method thereof. The in-depth profile control channeling sealing agent is prepared from the following raw materials: potassium humate and/or sodium humate, polyanionic cellulose, urotropine, phenol, sodium tripolyphosphate, beta-cyclodextrine and/or a beta-cyclodextrine derivative, thiourea and/or a thiourea derivative and water. The invention also provides an application method of the in-depth profile control channeling sealing agent in a steam-drive oil reservoir channeling sealing measure, the method comprises the step of injecting the deep profile control channeling sealing agent into a stratum with the temperature of 80-290 DEG C, wherein the injection amount is more than 500m < 3 >. The in-depth profile control channeling sealing agent has good pumping performance and temperature resistance, long gelling time and high high-temperature plugging rate, and has an obvious oil increasing effect when being applied to profile control channeling sealing construction.

The invention relates to a method for injecting an oil-displacing agent into an oil layer by utilizing fracturing prepad fluid to improve the recovery efficiency. By utilizing the opportunity of only one-time fracturing transformation, energy-increasing, huff and puff, replacement and imbibition three-time oil recovery chemical agents are added into the fracturing prepad fluid, the energy-increasing, huff and puff, imbibition and oil-displacing chemical agents are injected into the oil layer to improve the recovery efficiency, the yield of a fractured well can be greatly increased, the oil increasing effect is obvious, the yield increasing effect of fracturing transformation is improved, and the single well recovery efficiency is increased. The huff and puff, imbibition and oil-displacing chemical agent system has the advantages of high oil washing effect, low viscosity, high permeability, low corrosivity and the like. According to the method for injecting the oil-displacing agent into the oil layer by utilizing fracturing prepad fluid to improve the recovery efficiency, secondary and tertiary oil recovery processes are combined with fracturing transformation, huff and puff, imbibition and oil-displacing chemical agents are injected into an oil layer to improve the recovery efficiency, the yield of the fractured well can be greatly increased, the oil increasing effect is obvious, the yield increasing effect of fracturing transformation is improved, the single well recovery efficiency is increased, and important significance is achieved on development of unconventional tight oil reservoirs at home and abroad at present.

The invention discloses a particle injection amount determination method for a fracture-vuggy reservoir flow regulation technology, which comprises: performing water injection operation on a to-be-researched reservoir area, and determining a water drive path, a flow regulation agent particle placement position, a shunt volume of each fracture channel at the bottom of a well and basic fracture information of each fracture channel; performing numerical simulation on the movement and accumulation process of the flow regulating agent particles in the oil reservoir area to be researched on the basis of the water drive path and the placement positions according to the shunt volume of each fracture channel and the basic fracture information, so as to obtain the total volume of a forming body formed by the flow regulating agent particles in each placement position; and according to the current total volume, determining the particle injection amount through the flow regulating agent injection speed. According to the invention, ineffectiveness caused by insufficient injection amount is overcome, and meanwhile, the phenomenon of complete blockage caused by too much injection amount is avoided, so that the oil increasing effect of an oil well is obvious.

The invention belongs to the technical field of microbial oil recovery, and particularly relates to a nitrogen-assisted microbial system as well as a preparation method and application thereof. The system is composed of a biological compound system and nitrogen, and the biological compound system is composed of functional microorganisms, a biological surfactant and a biopolymer. The preparation method comprises the following specific steps: uniformly mixing functional microorganisms, a biosurfactant and a biopolymer to obtain a mixture of a biological compound system; and injecting the biological compound system mixture pressurized by the plunger pump and nitrogen pressurized by the gas booster pump into ground foaming equipment at the same time to form a nitrogen-assisted microbial system. The method has the advantages of being long in field test validity period, good in oil increasing effect and high in input-output ratio, the validity period is longer than 12 months, the average daily oil increasing amount of a single well is larger than 5 t, and the input-output ratio is larger than 1: 5.

The invention discloses a method for determining the medicament injection rate fracture-vug type oil reservoir partition plate bottom water control. The method comprises the following steps: determining the thickness of a partition plate according to the production pressure difference of a current production well and the water drive strength after a partition plate medicament is gelatinized; monitoring the position of an oil-water interface, and determining the radius of a circular bottom water control partition plate formed by the partition plate medicament at the position of the interface and limited by a current production well oil reservoir body; determining the effective thickness of the partition plate formed after the partition plate medicament is gelatinized in oil-water under a preset temperature threshold value of a high-temperature deep well reservoir through an indoor experiment, and obtaining a loss coefficient representing the loss degree of the partition plate medicament from injection to formation of the bottom water control partition plate; and obtaining the partition plate medicament injection rate according to the thickness, radius and loss coefficient of the partition plate. According to the method, the ineffectiveness caused by insufficient injection rate is overcome, the phenomenon of complete blockage caused by too much injection rate is also avoided, the oil increasing effect of an oil well is obvious, and the recovery efficiency is improved.