METHOD OF SEARCHING FOR OIL AND GAS DEPOSITS Russian patent published in 2012 - IPC G01V11/00 G01V1/00 G01V7/00 

FIELD: physics.

SUBSTANCE: CDP survey is carried out in a deep modification. Dynamic anomalies are identified, from which oil-bearing channels are predicted and localised. Investigation is then carried out via 2D or 3D CDP survey to trace the oil-bearing channels. Further, the gravitational field instability is studied at the territory where the oil-bearing channels come out. To this end, non-uniform gravity measurements are taken on points installed on the location and change in gravitational field over time is determined on each of the points. Said gravity measurements are taken on profiles which cross the projection of channels selected by seismic survey onto the ground surface. The degree of activity of the oil-bearing channels is determined from the gravitational field instability. Further, horizontal wells are drilled across the stretch of the active channels or at an angle of 60-120° and said wells are investigated, results of which determine permeable affluent zones - the oil-bearing channels being sought.

EFFECT: high efficiency of searching for oil and gas by increasing accuracy of locating oil-bearing channels in the plan view.

5 cl, 2 dwg