Drainage Anomaly
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BANSKANDI (ASSAM) AND KANTHAN, REASI (JAMMU) DRAINAGE ANOMALIES: POTENTIAL TARGETS FOR HYDROCARBON EXPLORATION Naveen Hakhoo and G.M. Bhat * Geology Department, University of Jammu (India) *e-mail: [email protected] In North-eastern state of Assam extensive surveys have been carried out to delineate potential hydrocarbon exploration sites. On satellite images numerous circular features/anomalies are seen and have been proved to exist by geophysical surveys and drilling (Agarwal & Mishra, 1994). Banskandi (Assam) is one such feature. In the Banskandi area (Figure: 1), the drainage (Barak River) exhibits a striking circular anomaly owing to a subsurface structural control. Field data revealed nearly N-S running longitudinal synclines on either side of the anomaly area, representing a shallow buried anticlinal domal structure, which yielded gas after subsequent seismic surveys. The anomaly as seen in Banskandi is also descrenible in Kanthan area (Figure: 2) (Reasi, Jammu) where drainage (Chenab River) veers its course from West to South (forming a loop) owing to subsurface structural control of MBT (Main Boundary Thrust) (Bhat et al., 2009b). At Kanthan gas bubbles have been observed in Chenab River following MBT (Bhat et al., 2009a), this locality can be a potential site for hydrocarbon exploration, which can be affirmed by detailed field and geophysical studies. As oil and gas occurs deep inside the earth, such geomorphic anomalies can help in the identification of targets for exploration in first instance (Halbouty, 1980).
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Transcript of Drainage Anomaly
BANSKANDI (ASSAM) AND KANTHAN, REASI (JAMMU) DRAINAGE ANOMALIES: POTENTIAL TARGETS FOR HYDROCARBON EXPLORATION
Naveen Hakhoo and G.M. Bhat*
Geology Department, University of Jammu (India)*e-mail: [email protected]
In North-eastern state of Assam extensive surveys have been carried out to delineate potential hydrocarbon exploration sites. On satellite images numerous circular features/anomalies are seen and have been proved to exist by geophysical surveys and drilling (Agarwal & Mishra, 1994). Banskandi (Assam) is one such feature. In the Banskandi area (Figure: 1), the drainage (Barak River) exhibits a striking circular anomaly owing to a subsurface structural control. Field data revealed nearly N-S running longitudinal synclines on either side of the anomaly area, representing a shallow buried anticlinal domal structure, which yielded gas after subsequent seismic surveys.
The anomaly as seen in Banskandi is also descrenible in Kanthan area (Figure: 2) (Reasi, Jammu) where drainage (Chenab River) veers its course from West to South (forming a loop) owing to subsurface structural control of MBT (Main Boundary Thrust) (Bhat et al., 2009b). At Kanthan gas bubbles have been observed in Chenab River following MBT (Bhat et al., 2009a), this locality can be a potential site for hydrocarbon exploration, which can be affirmed by detailed field and geophysical studies.
As oil and gas occurs deep inside the earth, such geomorphic anomalies can help in the identification of targets for exploration in first instance (Halbouty, 1980).
Figure: 1
Banskandi
Barak River
Figure: 2
Kanthan
Chenab River
