SU175254A1 - - Google Patents

Description

Methods are known for automatically constructing seismic sections by adding reproduced information signals on the screen of a cathode ray tube with a long afterglow or through photo accumulation. Existing methods do not have sufficient speed and do not provide linear summation of a large number of seismic traces.

The proposed method differs from the known ones by simultaneously reproducing seismic vibrations from all traces of the seismogram with increased speed and subsequent transformation of the oscillations into a sequence of pulses, with channel separation in time. The resulting pulses are used to control the intensity of the light beam, pass w, it along the diffraction isochron, the coordinates of which are calculated by the interrupt on the counting device. The diffraction isochrons are folded in the form of potentials on the target of the transmitting electron-beam tube, producing an image of a discontinuity of the medium. In addition, to study the relative physical properties of the medium, the amplitudes of the signals on the cut are measured by reading them from the target of a transmission electron tube, presenting the results in digital form.

The construction of the seismic section is carried out as follows. Seismic vibrations simultaneously from all the tracks of one or a number of seismograms are perodically reproduced at a speed exceeding the recording speed by 1-100 times, which reduces the time it takes to build sections. The oscillations from all the tracks ceiicMorpaMM are reduced to one drop with the separation of nx in time with

using an electronic switch. The output signals from the switch are used to control the light beam traveling along the diffraction isochrones, the coordinates of which are continuously calculated by a high-speed counting device.

alternately for all pulses following

one after another for each channel through 1 -

10 milliseconds per record.

Diffraction isochropes are projected onto

The target of the electron beam of the electron-beam tube, where it is folded in the form of potentials, forms an image of a section of the medium, which is then transformed into a visible shape with the help of a video control device and documented on a photo-monitor.

The amplitudes are measured along a series of vertical lines in the section when reading from the target of the transmitting cathode-ray tube and present the results in 3 in determining the relative physical properties of the boundaries in the medium. The subject of the invention is a method for automatically constructing seismic sections using a diffracted wave method using electron-beam tubes and computing devices, characterized in that, in order to improve the quality of 10 and the speed of construction of sections, to carry out continuous visual monitoring and to study the relative physical properties of the medium, simultaneously reproduce seismic 5 4 oscillations from all traces of the seismogram with increased speed, with subsequent conversion of oscillations, with channel separation during In a sequence of pulses controlling the intensity of the light beam passing along the diffraction isochrone, diffraction isochrones are put together in the form of potentials on the target transmissive tube target, and an image of the cross section of the medium is measured, and then the amplitudes of the signals on the cut are measured when they are read from the transmitter tubes, presented the results in digital form.