The invention discloses a comprehensive modeling method of a complicated mountain front tectonic zone and an established geologic structure model. The comprehensive modeling method comprises the following steps of recognizing and depicting rupture, explaining the rupture, checking the cutting relation and rationality of the rupture, driving a tectonic system according to major rupture, confirming stratum filling, preliminarily establishing the model and performing continuous adjustment and modification through forward earthquake modeling and forward gravity modeling to obtain the reasonable model. The comprehensive modeling method utilizes a field outcrop, gravity, a magnetic method, an electrical method, an earthquake, well drilling and other information to perform modeling and obtain a reasonable and correct subsurface structure and strata distribution, oil-gas exploration is performed with the information as a guidance, various information is organically integrated, one-sidedness of single information modeling is reduced, and a formed modeling technology effectively avoids the modeling subjectivity of different persons. Therefore, establishment of the geologic structure model of the complicated mountain front tectonic zone is facilitated, an oil-gas accumulation position is confirmed, the exploration risk is reduced, and the exploration success rate is improved.

Comprehensive modeling method of complicated mountain front tectonic zone and established geologic structure model

The invention discloses a well-constrained two-dimensional seismic variable velocity field nonlinear error correction method which comprises the following steps: 1, performing deduction and conversion to improve and correct stack velocities of a poor data quality section and a seismic data-free section in a two-dimensional work area, and performing polynomial fitting on all the stack velocities on grid points to establish an initial stack velocity field; 2, generating an average wellhead velocity; 3, constructing an error function, namely making an error curve of a well side stack velocity and the average wellhead velocity, and an error curve of the well side stack velocity and a non-well side seismic channel stack velocity; 4, performing error correction on the seismic stack velocities in the grid points to establish a more reasonable and more accurate variable velocity field by taking nonlinearly variable function values obtained in step 3 as correcting values; 5, performing time-depth conversion on an interpretation time horizon to realize variable velocity mapping by utilizing a corrected variable velocity average velocity model. According to the method, errors of the variable velocity field are favorably reduced, so that the variable velocity mapping accuracy is improved.

Well-constrained two-dimensional seismic variable velocity field nonlinear error correction method

The invention discloses a paleotectonic map mapping method and a device thereof. The paleotectonic map mapping method comprises the steps of constructing variable velocity mapping, carrying out well calibration to obtain a depth error, carrying out earthquake prestack three-parameter simultaneous inversion to obtain a product of a lame constant and density, extracting an earthquake average amplitude, constructing overdetermined equations related with the depth error, the earthquake average amplitude and the product of the lame constant and the density, solving the least square solutions of the overdetermined equations, calculating the deep error of a target layer of an uncorrected point according to a formula, and generating a paleotectonic map. According to the paleotectonic map mapping method and the device thereof, through combining the well calibration data and a plurality of seismic attributes, the response relation between the depth error of a well calibration point and the seismic attributes is estimated, thus the depth of a no-well area is corrected by using the seismic attributes, and a more accurate and reliable paleotectonic map can be generated in the condition that the number of well control is few.

Paleotectonic map mapping method and device thereof

The invention provides a two-dimensional earthquake speed change space correction mapping method for high steep structure regions. The method comprises steps that fault and horizon interpretation is carried out at a stacked section or a demigration section, and two-dimensional measuring line fault plane combination is carried out on a target layer; gridding of a plane combination result is carried out to generate a T0 structural map; on the basis of the T0 structural map, speed conversion and speed change mapping are carried out to acquire vision altitude depth horizon data. Automatic space correction is carried out on the basis of the vision altitude depth horizon data.

Two-dimensional earthquake speed change space correction mapping method for high steep structure regions

An embodiment of the invention provides an earthquake imaging processing method and an earthquake imaging processing device The earthquake imaging processing method includes arranging a first wave detector and a second wave detector in an excitation well, wherein the first wave detector is positioned above the second wave detector, and a preset range of the excitation well includes at least one high-steep structure; acquiring a downgoing wave signal received by the first wave detector and a full-wave signal received by the second wave detector, wherein the full-wave signal comprises a reflection wave signal of the at least high-steep structure; computing related signals of the downgoing wave signal and the full-wave signal, wherein the related signals serve as a reconstructed wave field with the first wave detector serving as a new earthquake source The earthquake imaging processing method is capable of eliminating interference during earthquake interference measurement and processing, so that imaging precision of the high-steep structures is improved

Earthquake imaging processing method and earthquake imaging processing device

The invention discloses an entrapment implementation method The entrapment implementation method comprises the following steps: 1, converting prestack depth migration data H (x, y, z) from a depth domain into time domain data T (x, y, z) by using a prestack depth migration velocity field V (x, y, z); 2, interpreting and imaging depth-time conversion data to obtain a T0 contour map; 3, recognizing and modifying the velocity field through areal geology; and 4, varying velocity and imaging the T0 contour map of the depth-time conversion data by using the modified prestack depth migration velocity field V1 (x, y, z) to obtain a final structural map H1 (x, y, z) By the entrapment implementation method, structural interpretation is performed by using the depth-time conversion time domain data, and the depth migration velocity field is properly adjusted to implement velocity varying and imaging so as to obtain the structural map according to speed control by non-seismic and drilled data in a study area, so that structural implementation can be performed without relying on a seismic imaging speed and the entrapment studying accuracy is improved

Entrapment implementation method

The invention discloses a data processing method and device for earthquake imaging, and belongs to the technical field of seismic prospecting. The method includes the steps: picking up a zero-offset VSP preliminary longitudinal wave and a certain number of uplink strong reflection wave fields (including uplink P waves and uplink SV waves), establishing an initial speed model of a stratum near a shaft, realizing two-dimension earthquake imaging of the zero-offset VSP uplink P waves and uplink SV waves through a constant speed gradient complexity medium bidirectional ray tracking method by starting with zero-offset VSP ray tracking, and verifying validity by the model and also by processing actual high-steep structure zero-offset VSP data. The advantages of the data processing method and device are that VSP uplink P waves and uplink SV waves can be accurately imaged, offset arc illusion on other fluctuation equation imaging profiles does not exist, and auxiliary explaining for a fine structure of a stratum near a shaft is achieved.

Data processing method and device for earthquake imaging

The embodiment of the invention provides a non-seismic data volume processing method and an apparatus. The method includes: obtaining the layer speed of a stratum corresponding to each non-seismic data point in a non-seismic data volume; and regarding each non-seismic data point in the non-seismic data points as a to-be-processed data point, dividing the stratum depth of the to-be-processed data point by the layer speed of the stratum of the to-be-processed data point and obtaining a time value corresponding to the to-be-processed data point in order to convert the non-seismic data volume in a depth domain to a data volume in a time domain. According to the method and the apparatus, the three-dimensional electrical data volume in the depth domain is converted to the data volume in the time domain, three-dimensional seismic and three-dimensional electrical combined inversion can be realized by employing the three-dimensional electrical data volume in the time domain and the three-dimensional seismic data volume in the time domain, compared with the realization of the three-dimensional seismic and three-dimensional electrical combined inversion by employing the three-dimensional electrical data volume in the depth domain and the three-dimensional seismic data volume in the time domain, seamless connection of the three-dimensional electrical data volume and the three-dimensional seismic data volume is realized, and the conglomerate carving precision is improved.

Non-seismic data volume processing method and apparatus

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Entrapment implementation method

Data processing method and device for earthquake imaging

Non-seismic data volume processing method and apparatus