ABSTRACT: Shale gouge ratio and fault compartmentalization in the Minas field, Indonesia
Keller, Joao V. A.1, Hariadi Dwidjojuwono2,
Wendy Sumner3, Karsani Aulia4
(1) Chevron Petroleum Technoly Company, San Ramon, CA
(2) PT Caltex Pacific Indonesia, San Ramon, CA
(3) Chevron Petroleum Technology Company, CA
(4) PT Caltex Pacific Indonesia, Riau, Indonesia
Fault seal potential was analysed using the FAPS software to estimate shale gouge ratios for several faults in the Minas field, Indonesia. The workflow involved the following steps: [i] data preparation - transfer depth IES-X v10.1 project into FAPS3.1; [ii] interpretation - in FAPS correctly tie faults and link horizons to faults; [iii] fault linking - produce throw measurements along faults to determine whether faults are 'hard' or 'soft-linked'; [iv] fault analysis - generate throw diagrams, horizon maps, and juxtaposition diagrams; and [v] calculate shale gouge ratios for faults (SGR > 20% thought to be sealing, based on measurements from other basins).
Results indicate that in Minas major faults (throw in the order of 100 ft) have high sealing potential, with SGR averaging well over 30% for most sands. Faults with 50-60 ft of throw have SGR that can be > 20%, although SGRs slightly bellow 20% also occur. These faults are believed to act as barriers, or baffles, to flow during production. Faults with 30-50 ft of throw have SGR averaging below 20% and are likely not sealing.
AAPG Search and Discovery Article #90913©2000 AAPG International Conference and Exhibition, Bali, Indonesia