39results about How to "Improve the effective permeability" patented technology

The invention discloses a method for measuring a gas and water relative permeability curve through coal-bed gas well production data. Average reservoir pressure and average water saturation are obtained with a material balance method, and therefore changes between absolute permeability and relative permeability can be obtained; changes of irreducible water saturation are predicted through the relation between irreducible water saturation and porosity; the absolute permeability and the relative permeability generated after end points are calibrated are coupled in the same state, a domain average effective permeability dynamic prediction model can be obtained, and an effective permeability curve can be obtained. The method solves the problem that in a laboratory, the relative permeability curve can not be accurately measured easily. Compared with the prior art, the positive and negative effect of a coal reservoir can be well reflected, the gas phase effective permeability can be effectively improved, and a powerful basis is provided for accurately predicting a gas and water output law of a coal-bed gas well and predicting future yield of a producing well.

The invention describes a method for treating near-wellbore zones involving the steps of injecting a magnesium metal with a catalyst into the desired area of the formation to be treated. Subsequently, combustive-oxidizing solution (COS) is injected into the zone of the formation to be treated. The COS initially reacts with the magnesium, which in turn initiates a vigorous oxidation reaction of the COS. The reaction gases and heat produced by the COS oxidation reaction are harnessed to enhance the productivity of the well by creating fractures in the treatment zone and by melting of paraffin and resin deposits in the treatment zone. As a final step, acid is injected into the formation to react with the formation thereby further enhancing the porosity of the fractures. In one embodiment, the COS uses ammonium nitrate as the oxidizer, and in another, urea or ethylene glycol may be added as a reaction fuel.

A superconducting short circuit current limiter (40a) for an alternating current system includes AC reactors having superconducting direct current bias windings (4a, 4b) that at normal conditions maintain the reactor's cores in saturated state. There are at least two AC coils (3a, 3b) for each phase operating at opposite half periods or at both half periods. The reactor may also have an additional feedback coil (42a, 42b) that at least partly compensates for the bias field of the superconducting coil at fault conditions enhancing a limiting capacity of the reactor. The reactor's core can be configured for decreasing its dimensions and mass as compared with known devices and for decreasing core losses. High voltage/high current devices include several standard modules connected in series or/and in parallel. A positional relationship of the modules is defined for decreasing necessary numbers of Amp?re-turns of superconducting and non-superconducting coils.

The invention relates to an inductive component (10) whose soft-magnetic core (11) consists of a powder composite. Said powder composite is produced by mixing a ferromagnetic amorphous or nanocrystalline alloy powder with a ferromagnetic dielectric powder and a thermoplastic or duroplastic polymer. Unlike conventional injection-molded or cast soft-magnetic cores, cores from a composite comprising a dielectric ferromagnetic powder allow for packing densities of substantially more than 55% by volume.

The invention discloses a slow blockage removing agent for an oil well and a blockage removing method, and belongs to the technical field of oil field exploitation. The slow blockage removing agent is prepared from prepad fluid, main fluid and post-pad fluid, the prepad fluid and the post-pad fluid both take hydrochloric acid as the main component of acid fluid for removing inorganic scale precipitation and dissolving reaction residues, and the main fluid takes glacial acetic acid and fluoboric acid as the main components of acid fluid for stabilizing clay mineral of a reservoir stratum, decreasomg the acid rock reaction speed, enlarging the blockage removing radius and increasing the blockage removing depth. For a fracturing production horizontal well, the treatment fluid is injected into the reservoir stratum in the former stage, the intermediate stage and the later stage, and liquid nitrogen is simultaneously injected, so that residual reaction fluid can be quickly drained after blockage removing construction is performed; pollution blockage near a well bore of the oil well can be effectively removed, the effective permeability near the well bore is increased, the individual-well producing rate is increased, damage caused by excessive acid corrosion to the rock framework of the reservoir stratum can be avoided, and therefore the reservoir stratum can be prevented from being subjected to secondary damage.

The present invention relates generally to a system and method for enhancing a recovery process employing one or more substantially horizontal wellbores. More particularly, the present invention relates to a method and system for enhancing a recovery process employing one or more horizontal wellbores by providing a zone of increased permeability in a hydrocarbon reservoir to facilitate vertical movement of flowable materials through the reservoir to thereby enhance the recovery process. In some embodiments, the reservoir comprises one or more vertical permeability impediments.

A method of manufacturing an amorphous alloy core including the steps of mixing an amorphous alloy powder with a solution made by dissolving a polyimide/phenolic resin binder in an organic solvent, evenly coating the binder in liquid phase on the surface of the alloy powder to make a powder of composite particles, molding the power of composite particles, and performing a heating treatment thereon. This invention also discloses a method of manufacturing a nano-crystal alloy core including the steps of (a) mixing an amorphous alloy powder with a solution made by dissolving a polyimide/phenolic resin binder in an organic solvent, evenly coating the binder in the liquid phase on the surface of the alloy powder to make composite particles, molding the composite particles at room temperature, and performing a heating treatment thereon at a temperature higher than the crystallization starting temperature of the alloy; and (b) performing a heating treatment on an amorphous alloy powder at over a crystallization starting temperature to make a nano-crystal phase, mixing a solution made by solving a polyimide/phenolic resin binder in an organic solvent therewith, evenly coating the binder in liquid phase on the surface of the alloy powder to make composite particles, and molding the power of composite particles at 100 to 300° C.

The invention relates to a Pseudomonas aeruginosa and its application. The microbial preservation number of Pseudomonas aeruginosa QHH S1-27-2 is CCTCC NO:M2012468. The Pseudomonas aeruginosa is applied to high salinity reservoir microbial oil recovery. The Pseudomonas aeruginosa can growth with crude oil as a sole carbon source, and a biological surfactant component in the metabolites of the Pseudomonas aeruginosa can reduce oil-water interfacial tension, so the effective permeability of reservoirs is increased to a certain extent, the oil displacement efficiency of injected water is improved, and the crude oil recovery rate is improved.

The invention relates to a salt-resistant and high-temperature-resistant foam discharge agent and a method for preparing the same, and belongs to the technical field of oil and gas field development.The salt-resistant and high-temperature-resistant foam discharge agent comprises, by weight, 0.2-0.5% of anionic-nonionic surfactant composite systems, 0.02-0.08% of microbial fermentation liquor andthe balance water. The microbial fermentation liquor is glycolipid producing biological surfactant or lipopeptide producing biological surfactant microbial strain fermentation liquor. The salt-resistant and high-temperature-resistant foam discharge agent and the method have the advantages that the salt-resistant and high-temperature-resistant foam discharge agent has salt-resistant and high-temperature-resistant foaming, foam stabilizing and liquid carrying ability and is excellent in condensate oil resistance and methanol tolerance, and accordingly the salt-resistant and high-temperature-resistant foam discharge agent and the method are favorable for environmental protection and sustainable development of oil and gas fields.

The invention belongs to the field of medicinal preparation, and relates to oil-in-water nano-emulsion capable of obviously improving the bioavailability of an insoluble medicament and a preparation method for the oil-in-water nano-emulsion. According to the prepared oil-in-water nano-emulsion, the water solubility of the medicament can be achieved, absorption of the medicament can be promoted, and the bioavailability of the medicament can be improved.

According to an aspect of the present invention, a wireless power transmitting apparatus of a wireless charging system includes a substrate, a first bonding layer formed on the substrate, a soft magnetic layer formed on the first bonding layer, a second bonding layer formed on the soft magnetic layer and a transmitting coil formed on the second bonding layer, wherein at least one of the first bonding layer and the second bonding layer includes a magnetic substance.

A synthetic acid composition for use in oil industry activities, said composition comprising: urea and hydrogen chloride in a molar ratio of not less than 0.1:1; a metal iodide or iodate; an alcohol or derivative thereof. Optionally, formic acid or a derivative thereof; propylene glycol or a derivative thereof, ethylene glycol glycerol or a mixture thereof; cinnamaldehyde or a derivative thereof; and a phosphonic acid derivative can be added to the composition.

An inhibition corrosion package for use with an acidic composition, where the package comprises a terpene component; a propargyl alcohol or derivative thereof; at least one amphoteric surfactant; and a solvent. Also disclosed are acidic compositions combining the corrosion inhibition package according to a preferred embodiment of the present invention for use in various industrial operations including but not limited to oil and gas operations. Also disclosed are methods of use of such compositions.

An inhibited mud acid composition, said composition comprising: hydrofluoric acid in solution; an alkanolamine; and a mineral acid selected from a group consisting of: HCl; MEA-HCl and other modified acids, wherein said alkanolamine and hydrofluoric acid are present in a molar ratio of at least 1:1.

The invention discloses a preparation method of a gemini hybrid fluorine surfactant applied as a shale fracturing fluid cleanup additive. The preparation method is characterized by comprising the following steps: adding 10-200 parts by weight of a solvent and 0.5-8 parts by weight of a catalyst into a three-mouth reaction bottle provided with a reflux condensing device, dropwise adding a solution containing 20-200 parts by weight of a solvent and 10 parts by weight of 2-perfluoroalkyl ethanol in an ice bath under the condition of introducing nitrogen, carrying out stirring and reacting for 4 hours, then conducting heating to 45-95 DEG C, slowly and dropwise adding a solution containing 20-200 parts of a solvent and 0.5-10 parts of diepoxyalkane, carrying out reacting for 10-36 hours, then gradually and dropwise adding a solution containing 10-250 parts of a solvent and 3-15 parts of halogenated alkyl sodium sulfonate into the three-mouth reaction bottle, continuing reacting for 24-72 hours, maintaining the reaction temperature within 45-95 DEG C, carrying out reduced-pressure distillation on a reaction product to remove the solvent so as to obtain a crude product, and then carrying out silica gel column chromatography separation to obtain the gemini hybrid fluorine surfactant with yield of 60-90%. The fluorine surfactant can obviously reduce the capillary pressure of shale.

An inhibited hydrofluoric acid aqueous composition, said composition comprising: hydrofluoric acid in solution; and a weak base selected from the group consisting of: lysine, arginine, histidine, glutamine, asparagine, tryptophan, and tyrosine; wherein said weak base and hydrofluoric acid are present in a molar ratio of at least 1:1. Also disclosed is a mud acid using this inhibited acid composition.