Reservoir visualization for geosteering of horizontal wells

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · AAPG Bulletin

OSTI ID:421056

Bryant, I D; Baygun, B ^[1]; Frass, M; Casco, R ^[2]

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1. Schlumberger-Doll Research, Ridgefield, CT (United States)
2. Schlumberberger Surenco, Caracas, (Venezuela); and others

Horizontal infill wells in the Lower Lagunillas reservoir of Bloque IV, Lake Maracaibo are being drilled in thin, oil-bearing zones that have been bypassed by gas. Steering the horizontal sections of these wells requires high resolution reservoir models that can be updated during drilling. An example from well VLD-1152 serves to illustrate how these models are generated and used. Resistivity images collected by wireline and logging-while-drilling (LWD) tools in the pilot well formed the basis of prejob, high resolution modeling of the formation properties. 3-D seismic data and data from an offset vertical seismic profile collected in the pilot well provided the structural model. During drilling information from cuttings and LWD tools was used to continuously update these models. After the well had been drilled, analysis of LWD resistivity images provided a detailed model of the relationship between the well trajectory and the dip of the formation. This information is used to improve interpretation of the LWD logs to provide a petrophysical evaluation of the well.

• OSTI ID: 421056
• Report Number(s): CONF-9609255--
• Journal Information: AAPG Bulletin, Journal Name: AAPG Bulletin Journal Issue: 8 Vol. 80; ISSN 0149-1423; ISSN AABUD2
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
DIRECTIONAL DRILLING
EVALUATION
EXPLORATION
GEOLOGIC MODELS
MWD SYSTEMS
OIL FIELDS
PETROLEUM DEPOSITS
PRODUCTION
RESERVOIR ROCK
SEDIMENTARY BASINS
VENEZUELA