SEISMIC PROSPECTING METHOD Russian patent published in 2005 - IPC

FIELD: seismic prospecting.

SUBSTANCE: method can be used when prospecting oil and gas fields. Method is based upon forming of random wave field (microseism) on the base of microseisms received during seismic prospecting works at profile and area observations. Wave field is formed by creating series of time fields composed by totality of routes being equally distant from explosion site for areas, which are free of recording of regular waves, and summary time fields composed by seismograms of multiple overlapping integrated by the same point of reception. Received wave fields are subject filter filtration and spectral analysis. Parts of abnormal values of low-frequency component and specific energy of the component in total random wave field is determined. Gradients of spectra are determined and maps of those parameters distributed along the area are built. If drilled holes are available, correlation links of c calculated parameters are found and those data is used in complex interpretation of seismic prospecting works of materials or for expert evaluation and specification of given before drilling recommendations for search or survey holes.

EFFECT: simplified technology.

4 dwg