Отправлено: 09.08.12 07:14. Заголовок: Interpretation of a Heavy Mineralogy Formation, North Slope of Alaska

Interpretation of a Heavy Mineralogy Formation, North Slope of Alaska, Using Logging-While-Drilling 2 MHz Resistivity: Laboratory Measurements, Modeling, and Wireline Comparisons

24677

Murphy, W.F.
Auzerais, F.M. *
Luling, M.G. *
Anderson, B.I. *
Tomanic, J.
Schlumberger-Doll Research
Bonner, S.D. *
Schlumberger-LWD
Sakurai, Shinichi *
ARCO E and P Technology
Wolcott, D.S. *
ARCO Alaska Inc.
* SPE Members
Copyright 1992, Society of Petroleum Engineers, Inc.

This paper was prepared for presentation at the 67th Annual Technical Conference and Exhibition of the Society of Petroleum Engineers held in Washington, DC, October 4-7, 1992.

Abstract
In order to understand better the effects of lithology, an anomalous log from a 2-MHz Logging While Drilling propagation resistivity tool is compared to a log from a wireline dual induction - SFL Spherically Focussed Tool. The C-sand in the Kuparuk River Field contains the minerals siderite and glauconite which exhibit atypical dielectric properties. For several wells in the Kuparuk River Field where both the 2-MHz and wireline logs were obtained, the agreement is good after dielectric processing.
However in this well, the 2-MHz tool reads differently from the wireline induction tool. In this well, the 2-MHz tool had been run during a washdown trip rather than while drilling.
A combination of laboratory core characterization and forward modeling is used to reconcile the differences between the two logs.
The 2-MHz and induction tool responses were modeled based on the laboratory results. The remaining differences between the 2-MHz and induction resistivity were caused by invasion effects inthewashdown mode