913 results about "Prospecting" patented technology

A GPS-based underwater cable positioning system for use in determining the shape and position of hydrophone streamers towed underwater behind survey vessels involved in marine seismic prospecting. The system includes a plurality of surface units towed behind the vessel. Each surface unit includes a GPS receiver to receive radio frequency GPS signals and to determine its positions. Each surface unit also has an acoustic transmitter to transmit an acoustic message signal representing its position and an optional time stamp into the water. Acoustic receiver units, attached spaced apart locations along one or more streamer cables, each include an acoustic receiver to receive the acoustic message signals from the surface units and to determine its position from the message signals. To augment the message signals from the surface units at locations distant from the surface units, acoustic transceiver units may be used. The acoustic transceiver units are attached to the streamer cables at ranges between the surface units and distant acoustic receiver units. The acoustic transceiver units each include an acoustic receiver that performs as the receivers in the acoustic receiver units and an acoustic transmitter to transmit acoustic message signals representing its position and an optional time stamp into the water to be received by the acoustic receiver units. In this way, the positions and shapes of towed streamer cables can be determined.

The invention provides a short distance transmission system for wireless electromagnetic wave signals of a downhole near bit and a short distance transmission method, and belongs to the field of geosteering systems and measurement while drilling instruments in industries such as petroleum, mines and geological prospecting. The automatic gain control technology is adopted in the short distance transmission system for realizing the automatic adjustment of enlargement factors of downhole weak signals. The short distance transmission system comprises a short section receiving assembly and a short section transmitting assembly, wherein the short section receiving assembly and the short section transmitting assembly are respectively provided with a receiving antenna and a transmitting antenna. Due to the fact that radial coupled antennas are adopted, the short distance transmission system is relatively simple in structure. Meanwhile, the short distance transmission system is high in arithmetic speed and can meet demands for real-time transmission of a large number of signals. Moreover, a front end processing module special for the downhole weak signals is utilized for carrying out the automatic gain adjustment to the collected signals, maintaining stable output of the signals and lowering processing difficulty of subsequent signals, and therefore the signal transmission quality is greatly improved.

Advanced prospecting features for generating targeted business-to-business sales leads and mailing lists allow users to save time and money by having the ability to preview all leads prior to purchasing, by suppressing previously licensed lists against new lists, by analyzing a list prior to purchasing it, searching on both primary and secondary standard industry classification (SIC) codes, and by having the ability to dedupe duplicate records in a list.

The invention relates to the field of oil and natural gas prospecting and exploitation, and provides a method of low-temperature gas-assisted coalbed methane fracturing technology. According to the method, by the aid of ultralow temperature characteristics of liquid nitrogen, cold shock transformation and ice formation are performed on a coalbed, ice blockage is caused to high-permeability channels (such as fractures), and effect of inorganic harmless dissoluble flowback fluid loss additives, even fracturing diverters and the like is achieved, so that the purpose of improving conventional coalbed methane fracturing technology is achieved. The method of the fracturing technology is suitable for primary fracturing of coalbed methane wells non-fractured or with natural fractures existing at the well bottoms, as well as refracturing of coalbed methane wells already fractured but low in productivity.

A system for underwater seismic prospecting or exploration on seafloors, especially deep seafloors, including streamers designed to contain the measurement devices and to lie on the seafloor, in the form of an inner tube that is non-stretching and non-compressible and an outer tube that is extensible to a certain extent. Through the injection of liquid between these two tubes, the buoyancy of each streamers is made positive. This enables it to be detached from the seafloor and towed to the next measuring position.

The invention relates to a method for eliminating linear regular noise of seismic prospecting and multiple wave disturbance in a self-adapting mode, aiming to provide seismic figures with high resolution for the exploration of oil fields. The method comprises the following steps: transforming seismic data sets in a field according to regular disturbance linear event virtual inclination; subtracting a seismic trace and a noise model trace to obtain a current signal value; determining the receiving probability of the noise by utilizing a probability density function and a threshold value; subtracting the separated noise from an original record to eliminate a regular interference wave; carrying out linear inverse transform on the seismic data to obtain a data set; carrying out linear inverse transform on the record with the regular interference wave being eliminated to obtain a seismic record; and carrying out separate frequency processing and noise suppressing processing. The invention dose not damage the frequency components of effective waves and has the advantages of fast operation speed, good effect for suppressing noise, suitability for pre-stack seismic data and post-stack seismic data, and the like.

The invention relates to a rock sample detection and data acquisition system. The system can realize elastic parameter test of a rock sample in the state of gas adsorption; in the system, a three-shaft pressure cabin is connected with a gas supply and metering control device for absorbing samples in the cabin and accurately metering absorption quantity, moreover, an ultrasonic transducer is installed on a cap of the (high) pressure cabin and integrated with an ultrasonic wave transmitting/receiving device so that the test of elastic parameters of methane absorption on coal can be realized truly. The system can automatically and continuously test in the processes of gas absorption and gas enrichment, thereby ensuring a consistent test environment, acquiring an absorption quantity and elastic parameter relation curve, improving test accuracy and efficiency and saving test time and cost. The rock sample detection and data acquisition system integrates methane enrichment mechanism simulation and rock physical property test, can be applied to seismic prospecting method research on coalbed methane and shale gas, mine advanced detection, coal mine safety research and the like.

The invention relates to the field of seismic prospecting, in particular to a pre-stack depth migration method. The method comprises the following steps of: performing migration velocity analysis on seismic data; calculating travel time, arc length, emergence angle and incidence angle by ray tracing; performing migration aperture calculation; and performing pre-stack depth migration by using a Kirchhoff integration vector migration formula. The method integrates migration velocity analysis, migration aperture selection, ray tracing and Kirchhoff integration formula, does not need wave field separation, and realizes multi-component simultaneous migration and accurate homing of converted wave. Based on the practical exploration data, the pre-stack depth migration method has good surface imaging effect and high imaging resolution, the continuity of the deep reflecting in-phase axis on a converted wave imaging section is improved, and the construction is clearer.

The invention is a seismic emission device designed to be immersed at the bottom of a water body (sea, lake, etc.), and method of implementation. The device comprises at least one (and preferably several) self-contained emission units (1) immersible at the bottom of a water body, combining at least one or more seismic wave sources (8), such as air guns for example, suited to be placed in contact with the body, local energy storage (9) which supplies the device a multifunction connection cable (5) connecting each self-contained emission unit to a surface relay unit (4), a communication system (4a, 6a, Y) providing communication with a central control station (6) located for example on a drilling or production platform (3). VSP repetitive exploration operations can be carried out in a well by activating successively the various emission units and by acquiring the signals picked up by receivers R1-n placed in a well for example and coupled with the formation. The device can be used for oil prospecting.

The embodiment of the invention provides crack prediction method and device. The method comprises the following steps of: acquiring prestack common midpoint dynamic correction gathering seismic data and related parameters for carrying out crack prediction; generating corresponding index data according to the prestack common midpoint dynamic correction gathering seismic data and acquiring horizon data according to post-stack seismic data interpretation; generating conventional broad azimuth prestack common midpoint dynamic correction gathering data from the prestack common midpoint dynamic correction gathering seismic data according to conventional narrow azimuth prestack common midpoint dynamic correction gathering data; acquiring the relevant trace header information of each seismic channel according to the conventional wide azimuth prestack common midpoint dynamic correction gathering data; calculating the azimuth angle of each seismic channel by utilizing the acquired trace header information; acquiring the reflection amplitude of each seismic channel by utilizing a pickup time window by taking a destination layer as a pickup center; and carrying out elliptical fitting by utilizing the acquired azimuth angle and the acquired reflection amplitude so as to determine the crack direction and the crack density. The embodiment can improve the prediction precision of a crack reservoir stratum, can not only realize the three-dimensional prediction on the crack reservoir stratum, but also carry out the two-dimensional prediction, thereby improving the success ratio of a prospecting well and a drilling well.

A method and apparatus for use in seismic prospecting are disclosed. The method comprises partitioning a plurality of converted split shear-wave data resulting from a common event and recorded at a plurality of azimuths and a plurality of offsets as a function of the azimuths and offsets; separating fast and slow split shear-wave wavefields in the partitioned data; deriving at least one attribute of at least one of the separated fast and slow shear-wave wavefields; and analyzing the derived attribute. The apparatus comprises, in one aspect, a program storage medium encoded with instruction that perform the method when executed by a computing device or a computer programmed to perform the device.

The invention relates to an electric prospecting method. In the method, a transmitter transmits a signal and a receiver processes the received signal to obtain impulse response and frequency response. The electric prospecting method is characterized by comprising the following steps of: transmitting a pseudo random sequence by using the transmitter; carrying out correlation operation on a time sequence received by the receiver by using the pseudo random sequence so as to obtain time domain impulse response; converting the time domain impulse response to frequency domain so as to obtain frequency response; and carrying out fitting and inversion by using a double Cole-Cole model so as to obtain parameters of a complex resistivity method.

The present invention relates to a three-dimensional modeling method and device for a geological prospecting ore body, wherein the method includes: Step 1, delimiting a single project ore body according to the exploration project, and obtaining the upper and lower boundaries of the ore body; Step 2, projecting the prospecting project onto the prospecting project On the profile, connect the upper and lower boundaries of the ore body on the exploration profile to obtain the geological body boundary of the ore body in the exploration profile; step 3, connect the geological body boundaries between the exploration profiles with a three-dimensional curved surface to obtain the three-dimensional reconstructed geological body. The invention can realize geological three-dimensional modeling from drilling to profile to curved surface to finally generate solid.

The invention discloses a self-sharpening polycrystalline diamond compact and a preparation method thereof. The self-sharpening polycrystalline diamond compact comprises a hard alloy base body and a polycrystalline diamond polycrystalline layer, wherein the polycrystalline diamond polycrystalline layer comprises 60-95% of diamond micro-powder and 5%-40% of binding agents, the binding agents are composite binding agents of metal and ceramics, the metal accounts for 1%-11% of the polycrystalline diamond polycrystalline layer, and the ceramics accounts for 1%-40% of the polycrystalline diamond polycrystalline layer, and the diamond micro-powder and the binding agents form the diamond compact respectively through chemical acid-base processing, physical vacuum processing, ball mill mixing, compression moulding and final high-temperature and high-pressure sintering. The diamond compact is good in self-sharpening, even in abrasive ratio and suitable for high-speed cutting machining and precise machining of non-black metal and geological prospecting.

The invention discloses a ground electromagnetic prospecting method based on an SPSP (Spread Spectrum) coding technology and a detection system thereof. The ground electromagnetic prospecting method based on the SPSP coding technology comprises the following steps of: supplying a current signal hopping according to a certain coded sequence to underground by a sending electrode, and using the current signal as a manual excitation source; receiving an electromagnetic field response message by a receiver, and meanwhile, synchronously recording the sent current signal and the geoelectrical response message of the position where the receiver is located by the receiver; and obtaining ground system response comprising the geoelectrical resistivity through a correlated identification method, and finally obtaining the distribution characteristics of the geoelectrical resistivity. According to the detection system applying the ground electromagnetic prospecting method disclosed by the invention, a sine-wave or square-wave signal in unipolarity or bipolarity in the whole preset frequency range can be sent by a transmitter, a sending sequence can hop according to a preset frequency pattern, and uncorrelated noise can be removed through a correlated identification detection method.

The invention relates to a novel frequency domain ground-to-air electromagnetic prospecting method which adopts a work mode of land launching and air receiving of electromagnetic waves to extract signal frequency spectrums and gives the underground electrical structure an inverse interpretation through a whole-region apparent resistivity method. A launching system which works on the ground launches multi-frequency pseudo-random waves towards the underground through multiple cascades and the signal with multiple frequencies can be obtained with one triggering, thereby greatly improving the detection efficiency. A receiving system is loaded on an aircraft, so when measuring the magnetic fields in the testing zone, it can adapt to the environment of complex surface structures, reduce the static effect caused by the near field effect and expands the detection range of electromagnetic prospecting. The receiving system can correct and compensate tested magnetic-field components when measuring multiple magnetic-field components, so the resolution capability of magnetic field measurement is improved. The frequency domain ground-to-air electromagnetic prospecting method is applicable to depth detection of severe surface zones and has the advantages of being wide in detection range, large in detection depth, high in detection efficiency, etc.

The invention provides deep inclined fractured reservoir earthquake amplitude prediction technology and belongs to the field of seismic prospecting. In the method, deep inclined fractured reservoir earthquake amplitude prediction is performed by using pre-stack seismic amplitude data and the method comprises the following steps of: performing theoretical model forward and inversion analysis of an inclined fracture medium on target area characteristics to acquire optimization and inversion parameters; optimizing date by the pre-processing of data, macro-surface element partial superposition and a residual gather leveling method so as to optimize parameters; and performing inclined fracture medium theory-based reservoir fracture inversion to obtain the parameters of the fracture. In the method, special processing means are adopted according to the characteristics of the deep reservoir, so that the signal-to-noise ratio is improved, and the real amplitude is guaranteed to the maximum extent. By using the method, the inclined fracture of the deep reservoir can be accurately predicted; accuracy and applicability are high; and the method is an effective method for predicting a deep fractured reservoir.

The invention discloses a method of estimating permeability of a low porosity and permeability reservoir and belongs to the field of petroleum geological prospecting. The method comprises: calculating limestone porosity according to acoustic, neutron and density logging curve; calculating first shale content index according natural potential logging curve; calculating second shale content index according to natural gamma logging curve; calculating lithological index of reservoir rock according to the limestone porosity calculated according to the acoustic, neutron and density logging curve; calculating particle diameter of the reservoir rock according to the first shale content index, the second shale content index and the reservoir lithological index; calculating cementation index according to statistical fitting relation between resistivity and the porosity; estimating permeability according to the particle diameter d of the reservoir rock and the cementation index m of the reservoir. High-precision calculation results for the permeability of the low porosity and permeability reservoir are achieved by using the calculation relation between the various logging curves and the permeability of the invention, and a powerful tool is provided for evaluating the permeability of a reservoir with low porosity and permeability, complex lithology and complex porous structure.

The invention relates to a geological survey method and particularly discloses a recognizing method for a concealed mineralization tectonic zone of granite type uranium deposit. The recognizing method comprises the first step of manufacturing a large-scale remote sensing structural interpretation map, the second step of selecting a structural alteration zone A beneficial to mineralization is selected on the large-scale remote sensing structural interpretation map, the third step of extracting chemical detection information to obtain a structural alteration zone B beneficial to mineralization, the fourth step of extracting physical detection information to obtain a structural alteration zone C beneficial to mineralization, and the fifth step of determining a preferred mineralization target region. As geology, physics, chemistry and remote sensing methods are combined, the deep mineralization beneficial section of uranium can be recognized accurately, and a basis is provided for uranium prospecting and preference prediction.

The invention provides a geophysical prospecting technical method for recognizing the lithology of petrosilex by using the combined characteristics of gravity-magnetic-electronic anomaly, which comprises the following steps of collecting and recording the physical characteristics of drill core; carrying out cluster analysis on the density, magnetic susceptibility and resistivity of rock by using k-means clustering and obtaining the clustering code of the drill core; carrying out gravity and magnetic anomaly stripping to the gravity and magnetic prospecting result for obtaining the anomaly and adopting the same clustering to conduct three-dimensional anomaly coding; and combining the clustering code of the physical characteristics of rock with gravity-magnetic-electronic anomaly code for reflecting the lithology of each petrosilex in an exploratory area. By developing the method for recognizing the lithology of petrosilex by using integral gravity-magnetic-electronic from qualitative speculation to quantitative statistics, the invention reduces human subjective factors from experience, avoids the situation that different geological interpreters obtain different results and improves the recognition effect of petrosilex.

A method of three-dimensional preserved-amplitude pre-stack time migration which is applied to reflected seismic data treatment in seismic prospecting is a pre-stack migration imaging method aiming at the three-dimensional collected seismic data. The technical scheme comprises three aspects: 1) performing the migration amplitude calculation by using a weight coefficient acquired according to a one-way wave equation and the reverse convolution imaging condition of the depth migration, 2) confirming the time varying three-dimensional migration aperture according to the biggest incidence formed underground, and 3) automatically suppressing the migration voice by performing strip attenuation method on the edge of the migration aperture. The method of the invention realizes high-efficient, high SNR (Signal to Noise Ratio) and preserved-amplitude migration imaging by improving the migration aperture, providing a weight coefficient of the preserved-amplitude and suppressing the migration voice in the imaging process. The preserved-amplitude reflective spot collection generated by using the method of the invention can better serve for the oil gas and fluid detection technique for pre-stack inversion. The method of the invention has high application value to oil gas and mine resource exploration.

A transaction data analyzer associated with a financial entity discovers patterns and/or sequences in consumer transaction data. The analyzer may provide businesses with feedback on spatiotemporal patterns in consumer spending habits. In certain embodiments, the transaction analyzer discovers the frequency of a sequence of purchases made at a first merchant immediately followed by purchases made at a second merchant. In another embodiment, the transaction analyzer discovers trends in consumer purchases made during the weekday versus those that are made during the weekend. The results of the analysis may be used in a variety of ways, including, but not limited to, risk mitigation, merchant/consumer prospecting, and targeted promotions.

Electronic blasting systems typically permit blasting with detonator delay times having millisecond accuracy. Disclosed herein are blasting apparatuses and methods of blasting that are capable of even higher degrees of delay time accuracy, for example involving programmable delay times selectable to an accuracy of about 0.25 ms, 0.1 ms, or better. Such methods and apparatuses present unprecedented and unexpected advantages for both mining applications, civil engineering uses, and in seismic prospecting.