Unconventional/complex reservoirs

Deep Directional Electromagnetic Technique Improves Well-Drilling Efficiency

This paper describes a technology with the capability to map and detect lithology changes ahead of the bit in real time.

BHA design. LWD=logging while drilling. MWD=measurement while drilling.
Fig. 1—BHA design. LWD=logging while drilling. MWD=measurement while drilling.

The structure in the Matindok block in Central Sulawesi operated by Pertamina has proven producible gas reserves in the Minahaki formation. One of the main challenges in this area is the low resolution of seismic data, leading to a high depth uncertainty. The complete paper describes a technology developed to meet these challenges with the capability to map and detect lithology changes ahead of the bit in real time.

Geological Background

A first exploration well, PEP-001, was drilled in 2018. The structure has a Miocene carbonate buildup play, and the target reservoir is the M pinnacle carbonate reef. The PEP-001 well was planned to set the 9⅝-in.

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