Schlumberger

EcoScope Multifunction LWD Service

Sourceless neutron porosity, sigma & spectroscopy measurements

EcoScope multifunction LWD integrates a full suite of formation evaluation, well placement, and drilling optimization measurements into a single collar that can be deployed faster than conventional LWD tools. Multiple near-bit sensors offer a compact design that eliminates the need for an americium beryllium (AmBe) chemical source in LWD nuclear porosity logging, substantially reducing transportation and wellsite risks.

Formation evaluation measurements include azimuthal natural gamma ray, a resistivity array, and a nuclear section with neutron porosity, sigma, spectroscopy, and an azimuthal density and photoelectric factor from a side-loaded cesium source.

Increasing drilling speed using PNG technology

Designed around a pulsed neutron generator (PNG), the EcoScope service uses technology developed by Schlumberger and Japan Oil, Gas and Metals National Corporation to deliver a full suite of formation evaluation, well placement, and drilling optimization measurements, including APWD annular pressure while drilling, caliper, and shock.

Minimizing rathole and improving well placement

Because multiple LWD sensors are integrated into a single collar and located closer to the bit, flat time associated with making up and breaking down the BHA is reduced. Having fewer connections also reduces the number of tools needed in the BHA assembly, minimizing the amount of rathole that must be drilled to provide comprehensive formation evaluation measurements and improving well placement and production and reserves calculations.

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EcoScope Service User's Guide

Written by the Schlumberger Drilling & Measurements head of petrophysics, this book explores every aspect of EcoScope applications, job planning, and measurements. Read book