Abstract:It is always very difficult to interpret volcanic rocks on conventional seismic data.So we try to describe volcanic rocks on walkaway VSP data.We demonstrate in this paper an application example in Santanghu Basin,Tuha Oilfield.A walkaway VSP survey was conducted in the Well M68 area,the walkaway VSP data was properly processed,and high-resolution and high-fidelity walkaway VSP P-wave imaging was achieved.Based on this data,volcanic rocks are exactly characterized,and vertical lithologic interfaces of both volcanic rock reservoirs and source rock reservoirs are carefully identified.The horizontal shape and distribution of volcanic rocks are also identified.Our volcanic rock morphology characterization is proved by the latter well drilling.
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