147 results about "Geophysical Processes" patented technology

A petroleum well has an electronic module and a number of sensors which communicate with the surface using the tubing string and casing as conductors. Induction chokes at the surface and downhole electrically impede AC flow through the (tubing or casing if so configured) with the resulting voltage potential useful for power and communication. A high bandwidth, adaptable spread spectrum communications system is used to communicate between the downhole electronics module and a surface master spread spectrum modem. Downhole sensors, such as pressure, temperature, acoustic and seismic sensors accurately assess downhole physical conditions. In a preferred form, the electronics module and sensors are wireline insertable and retrievable into a side pocket mandrel in the tubing string. Permanent downhole sensors that can communicate with the surface allow such diverse applications as optimizing well and field performances, monitoring and assessing the geophysics of the fomrations around the well, assessing well and reservoir reserves, assessing reservoir conditions.

A geophysics-based method for determining the position of a stationary earth object uses the periodic changes in the gravity vector of the earth caused by the sun- and moon-orbits. Because the local gravity field is highly irregular over a global scale, a model of local tidal accelerations can be compared to actual accelerometer measurements to determine the latitude and longitude of the stationary object.

The invention discloses a tunnel construction large-scale integrated geophysics advanced detection model test device, which comprises tunnel surrounding rock, a main tunnel model, a model test case, a water-containing geological structure device, a numerical control automation construction device and a main control chamber. The model test device is a large-scale integral geophysics advanced detection model test device meeting the detection of a seismic wave method, an electromagnetic method and a direct current power method, the geophysics advanced detection model test device can be utilized for studying the geophysics response characteristics of the water-containing geological structure device in front of a tunnel face, in addition, various geophysics advanced detection forward and inversion methods of the water-containing geological structure device are verified, the relationship between some geophysics detection method results and the water inflow is studied, and the test foundation is laid for the water inflow prediction and the advanced prediction of the water-containing geological construction device in actual engineering.

Application of nonlinear resonance interferometry is introduced as a new geophysical approach to improve predictability in characterization of subsurface porosity, rock and fluid properties. In contrast to reflection methods that remove random information noise, nonlinear resonance interferometry exploits the full seismic acquisition spectrum to assess how low frequency and high-frequency noise is differentially and directly modulated by varying levels of porosity and hydrocarbon content in the lithologies of interest. In some examples, systems and techniques implement novel computational interactions between acquired seismic wavefield attributes and a nonlinear system in software to amplify distortions in seismic noise and exploits injection of synthetic noise, in software format, to detect hydrocarbon traps and lithology changes at spatial scales below seismic resolution, thereby increasing the information value of low-resolution data. The techniques are broadly applicable to de-risking conventional clastic and carbonate reservoirs and non-conventional shale gas resource prospects.

The invention provides a method and device for establishing a full-waveform inversion model for geophysics parameters. The method comprises following steps: residual values of real wave-fields and initial model observation wave-fields are calculated; by use of the residual values, gradients of an objective function to model parameters are calculated through an adjoint state method; A Hessian matrix is calculated by use of variations of the model parameters and variations of the gradients By use of the gradients and the Hessian matrix, trust region sub-problems are established through performing second-order expansion calculation to the objective function according to Taylor's formula; the trust region sub-problems are solved through a conjugate gradient method to obtain solutions, namely the probe step length of the next iteration, of the trust region sub-problems; updates of the model parameters and trust region radii are performed on the basis of the trust region algorithm to obtain the full-waveform inversion model of geophysics parameters. By use of the method and device, a high fidelity velocity model is obtained.

The present invention belongs to the uranium geology and resource evaluation technology field, in particular to a method of positioning the uranium deposits rapidly and effectively in a hot spot active region. The method comprises the following steps of 1 determining a hot spot active region range and a geological background; 2 screening and positioning a uranium mineralization favorable area in the hot spot active region; 3 screening and positioning a key section in a favorable metallogenic region; 4 determining a uranium mineralization environment in the key section; 5 integrating the metallogenic information and predicting the mineralization; 6 drilling and verifying in the key section. A uranium deposit and ore body positioning technology of the present invention is based on a brand new hot spot uranium mineralization theory and a prediction method and combines the geology, geophysics and geochemistry features to carry out the regional mineralization prediction and positioning on the basis of fully mining the previous data, and an operation method is simple and convenient and is high in accuracy, the prediction blindness is reduced, and the evaluation time is shortened.

The invention relates to a geographic tuple based quantitative prediction method of ore concentration areas, which is characterized by establishing the quantitative prediction method of mineral resources in the Central Asia region by analyzing the time-space evolution process of the mineral resources in the region, taking GIS as a platform, applying the nonlinear theory and the artificial neural network technology, integrating multivariate information such as geology, geophysics, geochemistry, remote sensing and the like, carrying out analogy on the geological characteristics of the minerals at different levels and the metallogenetic geological setting and dividing favorable metallogenetic areas at different levels. The method solves the problem of failure of quantitative prediction in the prior art.

This invention related to the geophysics, in particular, to geophysical methods of well survey, and can be applied for removal of wellbore liquid that fill the well, during the well logging process. This invention characterizes a filter for solid particles; which can be mounted at the suction side of submersible motor-driven pumps.A well filter for submersible motor-driven pump comprising an elongated housing in which a cylindrical filtering element is installed. At one end of the filtering element, a fixture for fastening the filter housing to the pump is mounted; at the other end, there is at least one fluid intake port. A shape-deformable sealing element is installed on the housing outer surface.The rigid structure of the sealing element creates problems with lowering the strainer to the well and may cause the damage of the said strainer. This damage creates leakage in the top part of the strainer. The way of resolving the engineering issue is development of a new design of the wellbore filter. The implementation of a new design of a wellbore filter makes the service life of submersible motor-driven pump longer.

The present invention relates to a double-platform multiradiant direction-measuring time-measuring cross-location method, main and auxiliary platforms can independently acquire data, every group of data includes azimuth of radiant and correspondent time mark, N radiants are formed into N*N crossing points, two platforms can form N*N groups of measured data correspondent to the crossing points, after every scanning period is completed, the data of auxiliary platform can be transferred into main platform by means of communication transmission to make mergence and implement optimum matching by calculating the nearness of data measured between two platforms, and the wrong position can be removed.

The invention provides a fuzzy evidence weight analytical method and technology for mineral forecasting, mineral resource assessment as well as environmental assessment. The forecasting for the minerals resource is completed by constructing multivariate space multivariate spatial information database, forming the spatial information evidence picture layer of minerals forecasting through data processing and information extraction, obtaining the forecasting weight of evidence picture layer through calculation, drawing the probability picture of minerals resource prediction through comprehensive multilayer evidence picture layer. The invention has the advantages of broad practicality and less information loss, high forecasting precision, and is suitable for multisource geological data, for example geological data, mineral data, geochemistry data, geophysics data and remote sensing data or the like, to carry out the precasting process such as information extracting, data integration, mineral resource assessment, mineral detection, environmental contamination assessment, natural calamity, risk assessment, ect.

The invention discloses a separation method for efficiently-collected multi-epicenter mixing data with multi-domain multi-time separation, relates to the field of geophysics, and aims at solving the problem that low separation quality in the prior art causes unsatisfied offset imaging results when a routine method is used. The data separation method comprises that a time domain aliased 2D shot record m is obtained; a central point shared gather b of aliased data is obtained; a separated effective signal S and separated adjacent shot interference N are obtained; a separated effective signal S' after gather conversion and separated adjacent shot interference N' after gather conversion are obtained; an effective signal NS leaked from the separated adjacent shot interference, adjacent shot interference NN purified from the separated adjacent shot interference, an effective signal SS purified from the separated effective signal and residual adjacent shot interference SN in the separated effective signal are obtained; and recombination is carried out correspondingly to generate a final separated effective signal S1 and final separated adjacent shot interference N1.

A method is provided for identifying multidimensional parameters of a plurality of P>1 sources of interest present in a predetermined multidimensional conductive environment by a plurality of observations (60) in a finite number of N≧1. The method includes using i) a factorisation of a problem matrix formulation, ii) the creation of a virtual network of the order 2q (q>1) sensors by using cumulants of order 2q from observations and iii) the concept of an extended deflation of order 2q taking into consideration the presence of potentially (but not entirely) correlated sources. The method and device can be used for electroencephalograpy, magnetoencephalography, geophysics and seismology.

The invention relates to the field of interleaving techniques such as satellite geodesy, geophysics, space science and the like, and provides a satellite gravity inversion method based on a two-star energy interpolation principle. In the method, the global gravity field is accurately and rapidly inverted by introducing high-accuracy inter-satellite distance interpolation of a satellite-loaded K waveband measuring instrument into two-star relative orbits kinetic energy and further establishing a two-star energy interpolation observation equation. The method has the advantages of high satellitegravity inversion accuracy, definite physical meanings of the observation equation, contribution to error analysis of a gravity satellite system, easiness for sensing high-frequency gravity field signals and low requirement on the computer performance. The sensing accuracy of a 120-step GRACE earth gravity field can be increased substantively, so that the two-star energy interpolation principle method provided by the invention is an effective method for establishing a new generation high-accuracy and high-space-resolution global gravity field model.

The invention discloses a method for inverting underground fluid volume change and three dimension surface deformation using InSAR. For an area influenced by underground fluid motions, firstly, the InSAR technology is utilized to obtain a measurement value of a surface deformation field in a slope distance direction after geographical coding of the area; then InSAR slope distance direction deformation measurement values are utilized to invert depth and thickness of an underground fluid block source in a nonlinear manner; further a combined solution model is established for all surface observation points and the underground fluid block source using satellite imaging geometry and elastic half-space theories; and finally, the least square method is used for computing three dimension deformation of the surface observation points and volume change of the underground fluid block source. The invention breaks through the technical difficulty that InSAR cannot precisely monitor three dimension deformation caused by underground fluid motions, and actively promotes practical development of the InSAR technology. In addition, the invention can obtain results about underground fluid volume change, and can provide important scientific values for reach on the geophysical process inside the earth.

The invention provides a method for predicting storage layer crack development parameters, and belongs to the field of petroleum geophysics exploration. The method comprises the following steps that (1) earthquake data is input; (2) earthquake data with different azimuth angles is used for extracting a target layer two-way travel time value, the normalization processing is carried out, and the two-way travel time value of each target layer after the normalization processing is obtained; (3) an earthquake rose figure and an integral crack development intensity plane figure are respectively generated on each point on a set lattice, the two figures are laminated and are then displayed, and a crack parameter plane figure is obtained. When the method provided by the invention is used, a crack type storage layer can be accurately predicted.

The invention brings forward a method and apparatus for obtaining controllable source audio magnetotelluric (CSAMT) apparent phase information, and relates to the field of coalfield hydrogeology and geophysics. The method comprises the following steps: obtaining CSAMT electric field component potential difference data; through the potential difference data, obtaining apparent resistivity data; and according to the apparent resistivity data, calculating apparent phase data by use of a ratio. According to the invention, restrictions of a "remote area" are removed, under the condition of lack of magnetic field data, the apparent phase information is obtained by use of electric field single component data, and thus an important reference basis is provided for CSAMT data interpretation.

The invention relates to the use of 1,8-naphthalimide derivatives and of their salts as scintillation agents and more specifically as agents for discriminating between fast neutrons and gamma rays.It also relates to liquid scintillators comprising these scintillation agents in solution in a solvent and to novel 1,8-naphthalimide derivates of use as scintillation agents, in particular for discriminating between fast neutrons and gamma rays.Applications: all the fields of use of scintillators and in particular industry, geophysics, fundamental physics, in particular nuclear physics, the safety of goods and people, protection from radiation of workers in the industrial, nuclear and medical sectors, medical imaging, and the like.

The invention discloses a cesium atom magnetometer comprising a laser, a first polarization beam splitter, a laser frequency stabilization module, a reflecting mirror, a beam expander, a half wave plate, a second polarization beam splitter, a quarter wave plate, a cesium atom bubble, a radio frequency field coil, a magnetic shielding barrel, a lens, a photoelectric detector and a phase-locked module. By applying the self-made 894nm external cavity semiconductor laser, a laser frequency stabilization device and a low-noise magnetic field measurement environment are established, and the double-resonant cesium atom magnetometer based on combination of optical pumping and radio frequency magnetic resonance phases is realized. Through parameter optimization of the magnetometer and closed-loop measurement, the external magnetic field measured by the magnetometer achieves the ultimate sensitivity of 19fT / Hz<1 / 2> and the intrinsic sensitivity of 8.6pT / Hz<1 / 2>, the spatial resolution rate is less than 2cm, and the cesium atom magnetometer is a precision measurement powerful tool for studying of high excited level of atoms and molecules, and has important application value in the aspects ofbiomedicine, geophysics, quantum frequency markers, military detection and the like.

The invention provides an optical fiber displacement sensor with an ultra-short baseline compliant cylinder structure and an optical fiber strain gauge. The optical fiber strain gauge comprises an optical fiber displacement sensor body (1), a measure baseline (4), a baseline fixing device (5), a suspension system (3), a measure control and signal recording and processing system (6) and a measurement calibration device (7); the optical fiber displacement sensor body (1) is fixed on a first bed rock (21) and connected with the head end (41) of the measure baseline (4); the tail end (42) of the measure baseline (4) is provided with the measurement calibration device (7) and fixed on a second bed rock (22) through the baseline fixing device (5); the suspension system (3) is arranged in the middle of the measure baseline (4), and the displacement sensor (1) and the measurement calibration device (7) are connected with the measure control and signal recording and processing system (6) through a signal connecting wire. The optical fiber displacement sensor is applied to a geophysical research, observation of crustal strain and solid tide, obtaining of earthquake precursor information and the like.

The invention relates to a stripe-shaped iron mine assessment method and device, and relates to the field of geology and geophysics. The stripe-shaped iron mine assessment method includes the steps that geology mineralization analysis is carried out on a to-be-assessed mine lot, a characteristic geologic model of the mine lot is built according to analysis results, and a geology-geophysics model corresponding to the characteristic geologic model is built; magnetic method surface sweeping measurement is carried out through magnetic method forward modeling of the geology-geophysics model, and status information of the mine lot in the horizontal direction is determined; transient electromagnetic method detection is carried out through transient electromagnetic forward modeling of the geology-geophysics model, and status information of the mine lot in the vertical direction is determined. Comprehensive advantages of the geology and the geophysics are comprehensively used, mutual restrains and mutual complementation are achieved, geology, superficial layer geophysics surface sweeping and electromagnetic detection is carried out under guiding of the geology mineralization theory, and the forecast effect of the mine lot is improved.

The invention provides an earthquake blind source deconvolution method based on independent component analysis. The earthquake blind source deconvolution method based on independent component analysis comprises reading earthquake data and designing deconvolution calculation time window according to a target stratum, fitting the probability distribution of an earthquake data reflection coefficient sequence by using a Gaussian mixture model, constructing an optimized object function of an ICA earthquake blind source deconvolution algorithm by selecting negentropy, solving the optimized object function by using an expectation maximization algorithm and acquiring a deconvolution operator satisfying a condition of convergence by using multiple iteration, executing convolution operation of the earthquake data and the deconvolution operator, and outputting the earthquake data undergoing deconvoluteion. The earthquake blind source deconvolution method based on independent component analysis resolves a problem of statistical hypothesis required by a conventional deconvolution method and has advantages of obvious geophysics significance, good preserved amplitude, and high output efficiency.

The invention discloses a sandstone oil and gas carrier bed geophysics-geology-geochemistry detection method and a sandstone oil and gas carrier bed earth physical-geological-geochemistry detection device, wherein the method comprises the following steps that a buoyancy model is built according to the actual measured density differences of oil, gas and water of underground oil-gas reservoirs; through combining the rock core analysis and logging curves, a sandstone shale content, porosity, permeability and displacement pressure model is built; an oil and gas conveying sealing surface is determined according to displacement pressure curves; sandstone layer sections with the buoyancy greater than the displacement pressure are detected, and possible carrier beds are sieved; through combining test results on hydrocarbons by oil-gas geology and geochemistry, the effective sandstone carrier bed is determined. The method and the device provided by the invention have the advantages that through combining the borehole geophysics, geology and geochemistry theories and technology, according to the oil and gas accumulation dynamics principle, the effective detection on the sandstone carrier bed is realized, so the scientificity on the oil-gas reservoir petroleum geology study is improved.

The invention relates to a satellite-borne accelerometer nonconservative force data accurate calibrating method based on a novel dual-satellite adjacent energy difference principle in the technical field of crossing of satellite geodesy, geophysics, space science and the like. The satellite-borne accelerometer nonconservative force data accurate calibrating method comprises the steps of: on the basis of establishing a reference disturbing potential-free dual-satellite disturbing potential difference observation equation, by using priori information of a global gravitational field model, establishing a novel dual-satellite adjacent energy difference observation equation on the basis of the dual-satellite adjacent energy difference principle, and fitting a scale factor and an offset factor of calibration parameters so that satellite-borne accelerometer nonconservative force data is accurately calibrated. The method has high calibration precision and is suitable for rapid calibration of single-satellite and dual-satellite accelerometer data, thus earth gravitational field inversion precision can be effectively enhanced.

The invention which relates to a non-cylindrical rock core surface acquisition apparatus belongs to the fields of geophysics and information storage technologies. The acquisition apparatus comprises a pedestal, fixtures, a table top elevating adjusting rod, a countertop, a camera, a connecting rod, a slide block connector, an annular guide rail, a drive shaft, timing belt wheels, a timing belt, a decelerator, a motor and the like. The pedestal is provided with an upper connecting frame, a lower part of the upper connecting frame is provided with the countertop by guide rails, and the countertop is provided with the fixtures; a fixed plate which is arranged on an upper part of the upper connecting frame is provided with the motor and the decelerator, and a middle part of the fixed plate is provided with the drive shaft; and the annular guide rail is arranged on the lower fixed plate, the connecting rod is fixedly arranged on a lower part of the drive shaft by a nut, and the connecting rod is provided with the camera and a lantern. According to the present invention, the rock core is vertically arranged on the countertop, the camera can rotate around the rock core through a horizontal annular moving mechanism, so the rock core surface can be acquired. Current problems that surfaces of crushed rock cores can not be acquired and scanned because the rock cores which are arranged horizontally are rotated by rollers and cylindrical surfaces of the rock cores must be intact are overcome.

The invention discloses a coherent population trapping (CPT) rubidium atom magnetometer. The CPT rubidium atom magnetometer comprises a vertical cavity surface emitting laser (VCSEL), a collimating lens, a gamma / 4 wave plate, an indium tin oxide (ITO) heater, an atomic vapor cell, a magnetic shielding barrel, a photovoltaic detector, a data collecting module, a temperature control module, an uppercomputer and a circuit control module. Under the action of a magnetic field in parallel to a light path, CPT signals generated by a modulating laser which passes through the rubidium atomic vapor cell are measured, and then according to the relation between the frequency difference and the magnetic field intensity of the CPT signals, precise measurement of the magnetic field is realized. The CPTrubidium atom magnetometer reduces the interference of external tangled magnetic fields, improves the stability of the output CPT signals, has the advantages that the sensitivity is high, the power consumption is low, the size is small and the like, and has significant application value in the aspects of biomedicine, geophysics, quantum frequency standard, military detection and the like.

A coated drill pipe for use in drilling ground such as in rotary drilling for explorative geophysics and associated methods and systems are disclosed and described. A protective coating can be coated over at least a portion of an exterior or interior surface of the drill pipe. The protective coating can include a polyurea such as an aromatic polyurea, a silicone modified polyurea, or an aluminized polyurea. Drill pipes can be shielded by coating a drill pipe with a polyurea composition such as by spray coating. In connection with suitable systems and coated or uncoated well casings, these coated drill pipes can perform for dramatically extended periods of time over conventional drill pipes.

The invention discloses an InSAR two-dimensional earth surface deformation monitoring method based on adjacent track data. The method comprises the following steps of firstly, using the SAR data of adjacent tracks to obtain the earth surface deformation measurement values of an earth surface at two different slant distance directions; then, acquiring two different slant distance direction deformation measurement values of the common area of adjacent tracks; calculating the incident angle and the azimuth of each point at first and second rails in the common area; and then, constructing the coefficient matrix for each point; and finally, according to the strict geometric relationship between the imaging geometry of a satellite and earth surface deformation, ignoring north-south deformation and establishing an equation set, and according to a least squares criterion, solving and acquiring earth surface two-dimensional deformation. In the invention, the technical bottleneck of InSAR two-dimensional deformation monitoring without a lifting track data area is broken through, an InSAR technology is actively promoted to develop towards a practical direction, and an important scientific value is possessed for studying a geophysical process and an inversion geological hazard parameter.

The invention discloses an injection-production production pattern constructing method for a carbonatite fault-karst reservoir. The method includes the steps that a geophysics method is used for recognizing and representing a fracture-cavity structure of carbonatite fault-karst; based on recognition and representation of the fracture-cavity structure, a conceptual model of the carbonatite fault-karst is obtained in an abstract equivalent way; based on representation and the conceptual model for the fracture-cavity structure, a mechanism model for the carbonatite fault-karst is established, and according to the mechanism model, an injection-production pattern for the carbonatite fault-karst reservoir is designed.

The invention provides a fluvial facies low-sand-factor reservoir prediction method. The method includes the following steps that: 1, synthetic seismogram fine calibration is performed so as to clarify the depth range of a fluvial facies low-sand-factor reservoir; 2, a variety of attributes are extracted, the macroscopic distribution characteristics of the main body of a river channel are jointlyanalyzed; 3, rock electric analysis is performed so as to optimally select a reservoir indication sensitivity curve; and 4, inversion is performed by using the sensitivity curve, the distribution condition of the reservoir in a longitudinal direction is predicted. According to the fluvial facies low-sand-factor reservoir prediction method of the invention, based on geophysics means and rock electric analysis, a practical and effective identification method is established. With the method adopted, the distribution of the fluvial facies low-sand-factor reservoir can be determined accurately; a potential target region can be revealed; and oil and gas exploration can better guided. The method can provide guidance and reference for other sand body reservoir prediction.