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140results about How to "Improve heterogeneity" patented technology

Method for identifying and interpreting carbonate rock ancient karst reservoir layer three-dimensional structure

The invention provides a method for identifying and interpreting carbonate rock ancient karst reservoir layer three-dimensional structure. Steps of identifying a single well cave preferably comprise that: according to a cave growing segment with definite rock core and electric imaging well logging information, conventional well logging response characteristics of the cave growing segment are summarized; cave sensitive well logging parameters are preferably selected via a well logging parameter intersection method, and an identification graph plate is established; a multi-parameter normalization weighting method is utilized to establish a cave identification function; steps of identifying an inter-well cave preferably comprise that: a synthetic seismic recording method is utilized toward each single well to calibrate a cave interpreting result of a depth domain to an acoustic inversion data volume of a time domain; then threshold values of a cave segment and a non-cave segment are confirmed so that the inter-well cave is effectively identified; continuous tracking is performed along the middle of caves which are large in scale and great in continuity so that a three-dimensional tracking layer is obtained, an average value of 2ms acoustic save impedance around the tracking layer is computed, and thus a three-dimensional space growing position of an ancient karst reservoir layer is obtained.
Owner:芯元(浙江)科技有限公司

Composite profile control and oil displacement extraction method for thickened oil reservoir through water injection and exploitation

ActiveCN102251763AAlleviate conflicts in water injection developmentExpand the affected volumeFluid removalCross-linkPolymer science
The invention relates to a composite profile control and oil displacement extraction method for a thickened oil reservoir through water injection and exploitation. The method provided by the invention comprises the following steps: preparing a polymer and water into a polymer solution with the concentration of 500-5000mg/L; preparing a cross-linking agent and water into a cross-linking agent solution with the concentration of 500-5000mg/L; mixing the polymer solution and the cross-linking agent solution according to the mass ratio of (1:1)-(10:1) to obtain a polymer gel solution; preparing a movable micro-gel and water into a movable micro-gel solution with the concentration of 1000-5000mg/L; respectively injecting the polymer gel solution and the movable micro-gel solution into a well to form an oil displacement segmentation plug, wherein the polymer is partial hydrolysis polyacrylamide; the cross-linking agent is an organic chromium cross-linking agent; and the movable micro-gel is a copolymer of acrylamide and N-N methylene bisacrylamide. The method provided by the invention can obviously improve the anisotropism in storage layers, among the layers and on planes, relieves the water injection and exploitation contradictions of the oil reservoir, solves the problems of tonguing and fingering and obviously enlarges the swept volume of a displacing solution, thereby greatly improving the recovery ratio of crude oil.
Owner:PETROCHINA CO LTD

Three-dimensional visualization modeling method for bearing/resisting stratum of coal measures

The invention discloses a three-dimensional visualization modeling method for a water bearing / resisting stratum of coal measures, and the method comprises the steps: preparing the base materials of research; building a corresponding fault model according to a digitalized structural map and break point data; carrying out the dividing of the water-bearing stratum and the water-resisting stratum, recognizing a corresponding bearing / resisting stratum interface, building a bearing / resisting stratum stratigraphic framework, and building a corresponding stratum model through the Kriging interpolation method; carrying out the research of deposition geologic features of the stratum of the coal measures, and building a depositional microfacies model through combining sequential indication simulation with the sedimentary microfacies distribution features; taking the phase control technology and theory as the basis, and building a physical model of the water-bearing stratum according to the collected and calculated physical data; and displaying the spatial distribution rule of the bearing / resisting stratum of coal measures according to the finally built related model. According to the invention, the method carries out the objective description of the spatial distribution of the bearing / resisting stratum through modeling, visually reflects the three-dimensional spatial distribution of the bearing / resisting stratum and the water abundance features of the water-bearing stratum, and provides a three-dimensional visualization basis for the research of the bearing / resisting stratum.
Owner:SHANDONG UNIV OF SCI & TECH

Crossed scraping-impacting composite drill bit

ActiveCN102678053AReduce difficultyReduce rock breaking energy consumptionDrill bitsConstructionsMining engineeringHydraulic structure
The invention discloses a crossed scraping-impacting composite drill bit belonging to the field of rock blasting tools for drilling equipment for oil and gas, mine engineering and building foundation engineering construction, geology, hydrology and the like. The crossed scraping-impacting composite drill bit comprises a drill bit body, a fixed cutting structure, a disc cutter cutting structure and a hydraulic structure, wherein the fixed cutting structure, the disc cutter cutting structure and the hydraulic structure are arranged on the drill bit body; the drill bit body is also provided with an impact cutting structure; and the impact cutting structure comprises a force transferring mechanism for transferring impact forces and impact cutting teeth, wherein the impact cutting teeth are solidified on a punch arranged at the tail end of the force transferring mechanism, and the punch can slide or slidingly impact relative to the drill bit body in the impact force transferring direction. Compared with a drill bit for blasting a rock in a cutting way, the crossed scraping-impacting composite drill bit is not only beneficial to the drilling of the cutting teeth of the drill bit to stratums and the increment of the rock blasting efficiency, but also beneficial to the retardance of the wear rate of the cutting teeth and particularly has remarkable technical advantages for higher-strength and stronger-abrasiveness stratums which are difficult to drill.
Owner:SOUTHWEST PETROLEUM UNIV

Ocean observation network system and method based on EC-REST system structure

The invention discloses an ocean observation network system and method based on an EC-REST system structure. Edge sensing equipment of a data source for sensing ocean observation data performs preliminary processing and storage on the collected data; the data acquisition layer is used for acquiring and transmitting ocean observation data sensed by a data source and transmitting the acquired data to a data storage layer; the data storage layer preprocesses the data transmitted by the data acquisition layer by utilizing an edge gateway and then uploads the data to the data processing layer; thedata processing layer realizes unified and coordinated migration and scheduling of resource loads such as computing tasks among sensing devices deployed in a distributed manner and between the sensingdevices and the edge gateway through an EC-REST architecture for data uploaded by the edge gateway; and the data application layer applies the result processed by the data processing layer. Interactivity and resource load balance of each sensing device in the ocean observation network are maintained, and high-efficiency and low-energy-consumption real-time observation of massive heterogeneous data in the ocean is realized.
Owner:OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI

Exome potential pathogenic mutation detection method based on family line

InactiveCN105925685ASolve the problem of mining potential pathogenic variantsImprove heterogeneityMicrobiological testing/measurementBiostatisticsFiltrationSingle mutation
The invention provides an exome potential pathogenic mutation detection method based on a family line. The detection method comprises the following steps: 1) reading a result file of an exome sequencing data processing flow, and conducting function filtering; 2) reading the file obtained in the last step, extracting mutations in all samples, calculating a union set, and then combining all samples, so that a matrix is constituted; 3) extracting mutation information in the matrix obtained in the last step, enumerating and assessing pathogenicity of single mutation and pathogenicity of combined dual-site mutation, so that a potential pathogenic mutation list is obtained; and 4) in accordance with the list obtained in the last step, calculating the appearance situations of sites in various samples and target genes. According to the method disclosed by the invention, data integration and basic filtration are completed by taking an output result of the common exome sequencing processing flow as an input condition; by virtue of a special mutation screening algorithm, a candidate set of the potential pathogenic mutations is provided; and the method focuses on solving a problem on potential pathogenic mutation mining of sequencing data with high heterogeneity, high mutation rate and high noise.
Owner:WANKANGYUAN TIANJIN GENE TECH CO LTD

Profile control-unplugging combining technique for water injection well

The invention discloses a profile control-unplugging combining technique for a water injection well. The profile control-unplugging combining technique comprises the steps that (1), well input fluid is prepared; (2), pressure is gradually increased, water is injected into a stratum, a relation curve of injection pressure and displacement is drawn, and an injection pressure curve knee P* is determined; (3), a cellulose plugging agent A is injected at the injection pressure smaller than P* and used for remote well profile control; (4), a profile control agent B forming glue through acid catalysis is injected at the injection pressure smaller than P*; (5), displacement fluid is injected; (6), well shutting for waiting on cement setting is carried out for 2-6 hours; (7), acid liquor C is injected at the injection pressure larger than P*; (8), pressure release is carried out; (9), normal water injection is restored, and if normal water injection can be achieved, construction is completed. According to the profile control-unplugging combining technique for the water injection well, water reducing oil increase of a high water content oil well is achieved, profile control and unplugging ofthe multilayer oil deposit water injection well are achieved, an injection profile is improved, and the oilfield development effect is improved; and construction operation of the water injection wellis easy, convenient, safe and efficient, and wide market application prospects are achieved.
Owner:CHINA NAT OFFSHORE OIL CORP +2

Particle diameter and rock property well-logging evaluation method under restraint of depositional microfacies

ActiveCN110318745ASolve the problem of vertical distribution of lithology with different particle sizesOperableEarth material testingParticle size analysisLithologyWell logging
The invention discloses a particle diameter and rock property well-logging evaluation method under restraint of depositional microfacies, and belongs to the technical field of reservoir well-logging evaluation research. The particle diameter and rock property well-logging evaluation method is characterized in that mudstones are split through a well-logging data-well-logging curve, well-logging recognition on five particle diameter and rock property disclosed thick layers of coarse sandstones, sandy conglomerate, medium sandstones, fine sandstones and siltstones is performed in rock physical model-depositional microfacies well-logging evaluation units to determine heterogeneity of a low-permeability and compact sandstone reservoir; the rock physical model-depositional microfacies well-logging evaluation units are divided out from geologic origin, and innovation is obtained from well-logging recognition on thick layers and the rock property of low-permeability and compact sandstone reservoir; and well-logging data, well-logging information and analysis test data are integrated, so that mudstones split by the well-logging data-well-logging curve and different particle diameters and rock property recognized in the rock physical model-depositional microfacies well-logging evaluation units are combined to form the evaluation method.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Isothermal absorption curve correction method based on gravimetric method

PendingCN111175170AAccurate correctionAccurately correct the original mathematical model,Weighing by absorbing componentRock coreMathematical model
The invention relates to an isothermal adsorption curve correction method based on a gravimetric method. The method comprises steps of carrying out a blank test before a rock core isothermal adsorption test, calculating the volume of a sample barrel under different test pressures, and finely characterizing the dynamic change of the volume of the sample barrel under different test pressures; respectively carrying out pretreatment test, buoyancy test and methane isothermal absorption test of a granular sample which is crushed to a laboratory test standard, in a buoyancy test phase, finely representing the dynamic change characteristics of the sample and the sample barrel under different test pressures, in combination with the dynamic change of the volume of the sample barrel under the same test pressure, constructing a dynamic change mathematical model of the sample volume under different test pressures, realizing fine representation of the sample volume under different test pressures, calculating the adsorbed state methane mass under different test pressures in the methane absorption test stage based on the fine representation, and drawing an accurate isothermal absorption curve based on a gravimetric method. The method can effectively guide evaluation of coal bed gas, shale gas and other unconventional natural gas resources.
Owner:XI'AN PETROLEUM UNIVERSITY

Chromium-aluminum ion compound profile control agent for highly permeable duct type oil deposit and use method thereof

A chromium-aluminum ion compound profile control agent for high-permeability pore-type oil reservoirs and its application method relate to the field of oilfield applied chemistry. The profile control agent of the present invention is injected into high-permeability pore-type oil reservoirs through double slugs, and the pre-slugs are mixed with multiple high-molecular polyacrylamides and additives to form a compound polymer to seal the high-permeability areas and large pores in the oil reservoir. plugging; the rear slug is mixed with multiple low molecular weight polyacrylamide and additives, which has the characteristics of low viscosity, strong fluidity and shear resistance. After the front slug is plugged, it is injected into the oil reservoir for control and displacement, which can inhibit plugging For the small-scale water channeling and fingering phenomenon caused by post-water flooding, the profile control agent contains an appropriate amount of surfactant, which can improve the hydrophilicity of reservoir rocks and inhibit the waxy, colloid, and asphaltenes that are difficult to control by traditional profile control methods. The phenomenon of deposition near the wellbore; the preparation method of the profile control agent of the present invention is simple, can be adapted to the preparation of water with a salinity of 500mg / L-35000mg / L, and the raw materials are cheap and easy to obtain.
Owner:DALIAN DONGYOU RUIJIA PETROLEUM TECH CO LTD

Compound polymer type profile control agent for low-permeability sandstone reservoir and use method of profile control agent

The invention relates to a low-permeability sandstone reservoir composite polymer type profile control agent and its application method, which relate to the field of oilfield applied chemistry. The present invention injects low-permeability sandstone reservoirs in the form of double slugs. The pre-slug is a multi-molecular compound polymer, which can be combined with insoluble suspended matter particles in the reservoir to form a polymer with a molecular coil structure around the core. Selective plugging of micro-fractures and large pores in the reservoir; the rear slug is a low-viscosity compound polymer, and an appropriate amount of clay stabilizer and surfactant is added to control and flood unplugged areas, which can suppress low-viscosity The phenomenon of clay swelling in seepage sandstone reservoirs can improve the deposition of wax, colloid and asphaltene near the wellbore; the invention can improve the heterogeneity of reservoirs, increase the follow-up water flooding sweep coefficient, and suppress dead oil areas in low-permeability sandstone reservoirs Formed to improve the disadvantages of traditional oil recovery methods such as low recovery rate and poor economic benefits of low-permeability sandstone reservoirs.
Owner:DALIAN DONGYOU RUIJIA PETROLEUM TECH CO LTD

Spectral characteristic variable selection and optimization method based on Stacking integrated framework

The invention discloses a spectral characteristic variable selection and optimization method based on a Stacking integration framework, and the method comprises the steps: constructing a sample set, and dividing the sample set into a training sample set and a testing sample set; selecting a representative characteristic variable selection method from the large classes of the variable interval selection method, the variable information selection method and the variable optimization selection method; constructing a plurality of base learners, integrating the base learners by adopting a Stackingintegration framework, constructing a meta-learner, and taking the output of the base learners as the input of the meta-learner; training and testing a base learner and a meta learner of the Stackingintegrated framework by using the sample set; and inputting the to-be-detected spectrum information into the basic learner, and obtaining a detection result of the to-be-detected spectrum according tothe output of the meta-learner. According to the spectral characteristic variable selection and optimization method based on the Stacking integrated framework, the defects of a single characteristicvariable selection method are overcome, the detection precision of a test sample is high, and the stability of a detection result is good.
Owner:CHINA THREE GORGES UNIV
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