TY - JOUR

T1 - Magnetic and gravity anomaly patterns related to hydrocarbon fields in northern West Siberia

AU - Piskarev, Alexey L.

AU - Tchernyshev, Mikhail Yu

PY - 1997

Y1 - 1997

N2 - A study of the features of gravity and magnetic fields in the vicinity of oil and gas reservoirs in West Siberia demonstrated a spatial relationship with the hydrocarbon deposits. The relevant magnetic and gravity anomalies cover approximately 900 000 km2 in northern West Siberia. Am- plitude and frequency were investigated initially using double Fourier spectrum (DFS) analysis. This was followed by (1) application of transformations, filtering, and "moving windows" analysis; (2) compilation of maps of regional and local anomalies, and potential field derivatives; and (3) investigation of the distribution of parameters in areas of known deposits. Hydrocarbon deposits are located mostly at the slopes 0f positive regional gravity and magnetic anomalies which are interpreted as relating to deep riftogenic struc-tures. At the same time, it is established that the location of hydrocarbon depositions coincides commonly with lo-cal gravity and magnetic minima generated by lows in basement density and magnetization. All known hydrocarbon deposits in northern West Siberia are in areas characterized by comparatively high gradients of constituent of gravity anomalies with a wavelength of about 90-100 km. These newly revealed links between reservoirs and potential field parameters may be a means to predict new discoveries in poorly explored territories and seas, primarily in Russia's Arctic shelf.

AB - A study of the features of gravity and magnetic fields in the vicinity of oil and gas reservoirs in West Siberia demonstrated a spatial relationship with the hydrocarbon deposits. The relevant magnetic and gravity anomalies cover approximately 900 000 km2 in northern West Siberia. Am- plitude and frequency were investigated initially using double Fourier spectrum (DFS) analysis. This was followed by (1) application of transformations, filtering, and "moving windows" analysis; (2) compilation of maps of regional and local anomalies, and potential field derivatives; and (3) investigation of the distribution of parameters in areas of known deposits. Hydrocarbon deposits are located mostly at the slopes 0f positive regional gravity and magnetic anomalies which are interpreted as relating to deep riftogenic struc-tures. At the same time, it is established that the location of hydrocarbon depositions coincides commonly with lo-cal gravity and magnetic minima generated by lows in basement density and magnetization. All known hydrocarbon deposits in northern West Siberia are in areas characterized by comparatively high gradients of constituent of gravity anomalies with a wavelength of about 90-100 km. These newly revealed links between reservoirs and potential field parameters may be a means to predict new discoveries in poorly explored territories and seas, primarily in Russia's Arctic shelf.

UR - http://www.scopus.com/inward/record.url?scp=0031147886&partnerID=8YFLogxK

U2 - 10.1190/1.1444192

DO - 10.1190/1.1444192

M3 - Article

VL - 62

SP - 831

EP - 841

JO - Geophysics

JF - Geophysics

SN - 0016-8033

IS - 3

ER -