Case Study
VisiTrak service navigated 2,838 ft of pay sand without pilot hole
Jun 23, 2020
Overview
Challenges
- Two horizontal offset wells available for pre-well modeling
- Sand distribution in well landing area was unclear due to seismic interpretation limitations
- Total planned length of horizontal section was 3,340 ft (1018 m), with a minimum required net sand of 984.3 ft (300 m)
Results
- Drilled horizontal well successfully without a pilot hole
- Mapped target sand thickness while following the upper surface of the sand
- Mapped correct reservoir using real-time inversion results after crossing faults
- Drilled 75% net-to-gross sand along a 3,343.2-ft (1,019-m) horizontal section
Case study details
An operator drilling in the Carapebus reservoir off the shore of Brazil requested Baker Hughes drill an 81/2-in., 3,340-ft (1,018-m) horizontal section in the reservoir’s facies 1 sand. The heel of the well was in an area below seismic resolution.
The Carapebus reservoir is a series of gravity flow channel deposits on the continental slope margin of the Campos Basin. The reservoir is subdivided into 3 facies types, with facies 1 being the only productive sand type. The thickness and distribution of the facies 1 sand within the reservoir was poorly known.
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