Schlumberger

To Find Oil, You Have to Drill
Part 9

Date: 11/03/2011

Drilling Measurements—Monitoring, Instrumentation, and Control

Measurement is key to understanding the science of drilling, and the only way to gain a complete picture of the drilling environment is to combine measurements coming from both downhole and surface sensors. The drilling fluid, which circulates down the drillstring before returning to surface, is an excellent source of information because it carries rock cuttings together with small quantities of formation fluids absorbed during the circulation process.

Analyzing the drilling process from the surface

Engineers from Geoservices employ a variety of surface sensors together with precision measurement equipment such as gas chromatographs and mass spectrometers to analyze the drilling process from the surface. For example, Geoservices FLAIR technology  provides the quantitative composition of any light hydrocarbon  components in the drilling fluid returns—corrected for the effects of recycling and contamination. This composition can vary dramatically between different reservoir compartments and zones of the same reservoir formation.

A powerful tool optimizes the rate of drilling

Combining these surface measurements with real-time downhole formation evaluation and drilling mechanics data from Schlumberger Drilling & Measurements technologies delivers a powerful tool for optimizing the rate of drilling while positioning the wellbore in the most productive zone. Furthermore, such real-time measurements can serve as input data to algorithms that provide the supervisory control systems that form the basis for a future generation of optimized automatic drilling.

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To Find Oil, You Have to Drill
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