초록 ▼

Seismic exploration method in arctic regions involving the generation of a seismic disturbance in the water beneath the ice in areas where conventional marine and land exploration methods are functionally inadequate. Seismic disturbances are generated by an air gun assembly which automatically execu

Seismic exploration method in arctic regions involving the generation of a seismic disturbance in the water beneath the ice in areas where conventional marine and land exploration methods are functionally inadequate. Seismic disturbances are generated by an air gun assembly which automatically executes lowering air guns through apertures in the ice and retrieving them while carrying out preventive measures against freeze-ups. Seismic sensing and recording equipment are positioned within an appropriate range to detect seismic data in the form of reflective or diffractive signals generated in response to the seismic disturbance after actuating the air gun array, wherein the seismic data is indicative of sub-surface structural formations existing below the body of water.

대표청구항 ▼

A method of marine seismic exploration in water beneath an ice layer comprising: surveying a segment of a predetermined path of exploration along a terrain including a layer of ice covering a body of water and scouting locations of additional segments along the path while placing markers along the p

A method of marine seismic exploration in water beneath an ice layer comprising: surveying a segment of a predetermined path of exploration along a terrain including a layer of ice covering a body of water and scouting locations of additional segments along the path while placing markers along the path designating respective locations corresponding to the segments, forming respective apertures in the ice layer at each of the locations as designated by the markers and lowering a seismic source unit into the water through an aperture in the ice layer, discharging the seismic source unit in the water to create a seismic disturbance, and additionally activating said seismic source unit subsequent to withdrawal from the water to clear any accumulation of ice on said seismic source units, recording seismic signal data generated from the seismic disturbance, and repeating the sequence of lowering the seismic source unit into the water through said apertures, discharging the seismic source unit in and out of the water, and recording seismic signal data generated from the seismic disturbance created thereby at each of the apertures.