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Specialized Well Log Acquisition of Formation Elastic Properties in Support of 4C Surface SeismicNormal access

Authors: E. Maili, S. Burns, T. Steele, P. Romero, W.H. Borland and T. Kim
Event name: IPTC 2007: International Petroleum Technology Conference
Session: A Changing World - Interdependence, Innovation and Implementation
Publication date: 04 December 2007
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 11.88Mb )
Price: € 20

Well logging programs are usually designed to measure
petrophysical properties within the reservoir and the
immediate surrounding formations. Rarely, if ever, is much of
the overburden logged. As more sophisticated surfacemeasured
geophysical methods are used, properties of the
overburden are becoming more important (fig. 1). One method
that is becoming more prevalent, 4C OBC seismic, can benefit
from logging formations from surface continuously down to
the reservoir. In preparation for the processing and
interpretation of a major acquisition of 4C surface seismic run
to illuminate a carbonate reservoir within Idd El Shargi North
Dome field located offshore Qatar (fig. 2), a specialized
logging program was devised and acquired on a well in the
field to obtain formation elastic properties of compressional
and shear velocity, including HTI anisotropy information,
continuously from the sea floor down to the reservoir.

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