--> ABSTRACT: Locating Bypassed Reserves in Geologically Complex Mature Fields Environments, by Dautel, Michael; Pitcher, Jason; Bittar, Michael S.; #90155 (2012)

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Locating Bypassed Reserves in Geologically Complex Mature Fields Environments

Dautel, Michael¹; Pitcher, Jason²; Bittar, Michael S.³
¹Halliburton, Kuala Lumpur, Malaysia.
²Halliburton, Houston, TX.
³Halliburton, Al Khobar, Saudi Arabia.

With fewer new oil discoveries, the industry today is turning to maximizing recovery from existing mature oil fields. To exploit trapped bypassed reserves, very complex and thinly laminated reservoirs are being drilled and evaluated. New reservoir management efforts aimed at maximizing production require increasingly sophisticated well placement and formation evaluation capabilities. Recent improvements in well placement and formation evaluation technology, such as azimuthal resistivity, have helped in gaining access to bypassed reserves and to thin bed areas that were originally not thought to be practical development targets.

This paper presents a review of azimuthal resistivity tools and their theory of operation. The planning and execution and interpretation of this new technology in complex thin sand-shale sequence in mature field is explained. Advanced formation evaluation based on this new azimuthal reading technology is detailed. This system, with multiple depths of investigation and an azimuthal 32 bin measurement around the borehole, creates a system that allows the accurate calculation of the horizontal and vertical resistivity and relative dip angle.

Finally, field examples and multiple case histories that illustrate the use of azimuthal resistivity technology in mature fields to access bypassed reserves are shown. Geologically complex environments are examined from the perspective of using the new measurements to obtain better geological and petrophysical answers. Thin bed environments are examined with these measurements to obtain a better understanding of development possibilities than was previously possible with the use of wave propagation resistivity tools.

 

AAPG Search and Discovery Article #90155©2012 AAPG International Conference & Exhibition, Singapore, 16-19 September 2012