METHOD OF PROSPECTING FOR GAS HYDRATE DEPOSITS IN PREEXISTENT FAULT AREAS

摘要

FIELD: physics, acoustics.;SUBSTANCE: invention relates to marine geophysics and can be used to prospect for gas hydrates at the bottom of water bodies. An acoustic emission sensor is placed on the shore in a fault area. Daily changes in elastic vibrations of the acoustic emission are recorded. The time of maximum tidal forces in the operating area is determined from the energy of the elastic vibrations. The activation time of the fault area and the "calm" time are determined. Pulses of the magnetic component of the electromagnetic field are detected on the water surface during the activation period of the fault. Anomalies of the electromagnetic field pulses are determined. Samples are collected at the centre of each anomaly or group of identical anomalies. The samples are analysed for the presence and content of the useful component. The boundaries of the deposit are determined from the contours of the anomaly or groups of anomalies in which anomalous content of gas hydrates was detected.;EFFECT: easier prospecting for gas hydrate deposits.