42results about How to "Improve exploration accuracy" patented technology

The invention relates to a velocity and acceleration two-parameter digital geophone, so that a problem that surveying accuracy is poor in the prior art can be solved. A micro electromechanical system acceleration transducer and a moving-coil velocity detector are integrated into one to form a digital detector that is capable of simultaneously collecting two physical quantities: velocity and acceleration of a same receiving point and has functions of signal collection and reception of velocity and acceleration at a same receiving point; therefore, subsequent data processing and analyzing can be carried out in fields of velocity and acceleration that are different physical quantities for describing displacement of the same receiving point and then comparison and analyzing are carried out. The digital geophone has advantages that: a seismic wave spreading characteristic can be studied precisely and surveying accuracy can be improved.

The present invention proposes an observation system optimization method and device for the consistent energy illumination of the target layer signal-to-noise ratio. The method includes: establishing a near-surface signal-to-noise ratio library; , form the lighting analysis results based on the signal-to-noise ratio of the target layer; perform consistency processing on the lighting results, and optimize the observation system. On the basis of conventional ray lighting of the target layer in the past, the present invention increases the weight factor of the signal-to-noise ratio. In addition to considering the influence of the velocity field on the lighting, the present invention mainly considers the impact of factors such as near-surface structure, lithology, excitation parameters, and surface relief elevation on the surface. The impact of the lighting results makes the design optimization of the illumination observation system based on the consistent energy of the signal-to-noise ratio of the target layer more in line with the actual situation, and can better guide the design and evaluation of the field observation system, so that the collected seismic data has higher energy and signal-to-noise ratio, ensuring Improve data quality and improve exploration accuracy.

The invention relates to the technical field of germanium resource exploration, and discloses a drilling layout method for coal-type germanium deposit exploration. Firstly, based on coalfield exploration data, the positions of existing germanium mineralization holes and faults within the exploration range are obtained; Then, based on the position of the existing germanium mineralized hole and the position of the fault, a plurality of first drill holes are arranged around the fault; then, each nth drill hole is cored to confirm that the nth drill hole is the nth mineralized hole , multiple n+1th drill holes are arranged around the nth mineralized hole, and n starts to accumulate from 1; until the n+1th drill hole reaches the boundary of the exploration range or the n+1th drill hole is a non-mineralized hole . The drilling layout method sets drilling holes according to the mineralization characteristics of coal-type germanium deposits, increases the layout density of drill holes in key areas, improves the control degree within the exploration range of coal-type germanium deposits, increases exploration accuracy, and reduces unnecessary drilling. settings, reducing exploration costs.

The application discloses a fault zone activity monitoring method, exploration method and device. According to the monitoring accuracy, set multiple monitoring points in the pre-measured target area, monitor the charged particles overflowing from the ground surface at each monitoring point, and output the measurement data related to the characteristics of the charged particles, analyze the measurement data, and draw the fault zone Distribution diagram. Due to the innovative proposal to monitor the characteristics of charged particles overflowing from the ground surface, the distribution of fault zones and the monitoring of fault zone activities are carried out, and non-destructive exploration is realized while improving the exploration accuracy of fault zones. Not only can fault zones be surveyed in the field and in cities, but also the activities of known fault zones can be monitored.

The invention provides a three-dimensional high-precision bin fractionation processing and evaluation technology for seismic data, and the method comprises the following steps: analyzing original data, and carrying out trace header modification, grid definition and linear normal moveout correction on data acquired by an observation system, thus acquiring a prestack multi-domain composite denoisedimage; based on the relationship between bin fractionation and the signal-to-noise ratio as well as the relationship between bin fractionation and the multiplicity during forward modeling, comprehensively compensating for the vibration amplitude, thus acquiring a tomographic inversion refracted wave static correction image; analyzing the quantitative relationship between bin fractionation and thelongitudinal resolution and lateral resolution, carrying out prestack shot-domain optimized deconvolution, and carrying out azimuth restrained bin fractionation and speed optimized analysis, thus acquiring a progressive frequency-divided residual correction image; and carrying out multiple three-dimensional prestack migrations, and establishing a three-dimensional prestack migration speed model, thus acquiring a prestack migration image. Thus, the method provided by the invention provides a reliable guarantee for improving the exploration development precision and upgrading a seismic exploration technology.

The invention discloses a one-dimensional joint inversion method for time-frequency electromagnetic data and magnetotelluric data. The transmitting frequency of the joint inversion time-frequency electromagnetism ranges from 0.025 Hz to 100 Hz, the frequency of the magnetotelluric sounding ranges from 0.0005 Hz to 320 Hz, the distances between all time-frequency electromagnetic measuring points and all magnetotelluric measuring points are calculated, the nearest magnetotelluric measuring point is obtained, data of the magnetotelluric measuring point are extracted, a joint inversion Jacobian partial derivative matrix of the time-frequency electromagnetism and the magnetotelluric sounding is calculated, a target function is calculated according to the regularization inversion principle, the target function is minimized through the conjugate gradient iterative algorithm, and when the fitting error of the target function reaches the set error standard or the iterations exceed the set maximum iteration number, the joint inversion is finished. According to the one-dimensional joint inversion method, the underground dielectric resistivity distribution below a measuring line can be obtained, the interpretation requirements for structures, faults and entrapments can be met, and the joint inversion result shows that the resolution from shallow to deep is higher than the resolution of the inversion result obtained by independently using time-frequency electromagnetic data.

The invention provides a method and a device for conducting reservoir prediction and based on earth surface consistency deconvolution. The method includes collecting earthquake records formed by reflection earthquake signals from underground, generating a target function according to the earthquake records, conducting earth surface consistency deconvolution on the earthquake records to obtain shot point components and demodulator probe components, conducting minimum phase processing on the shot point components and the demodulator probe components to obtain minimum phase shot detection response, acquiring earthquake records free of non-geological factors according to the target function and the minimum phase shot detection response, mapping an earthquake section image according to the earthquake records free of the non-geological factors, comprehensively interpreting the earthquake section image to obtain a reservoir prediction result. The method and device removes effect of collection and earth surface factors on the earthquake records, improves real underground structure reflection capability of earthquake files and further improves reservoir prediction accuracy.