Industry Article: Multipole Sonic Service Helps Lower Well Construction Risks

Multipole sonic service helps lower well construction risks
Publication: E&P
Publication Date: 07/01/2015

To minimize risks and maximize drilling performance, drillers are increasingly relying on sonic-while-drilling technologies. Such technologies acquire real-time measurements of a reservoir’s acoustic properties, which are used to reduce drilling risks, improve well placement, optimize completions design, and ultimately, deliver a well to its target depth in a cost-effective manner. The Schlumberger SonicScope multipole sonic-while-drilling service combines high-quality monopole and quadrupole measurements to deliver real-time compressional and shear slowness in any downhole environment. A fundamental part of this service is the quality control (QC) analysis performed during data processing, which Schlumberger provides to the operator in the form of QC logs that include slowness-time coherence, slowness frequency analysis, inversion quality controls, and slowness/frequency dispersion plots.

Three separate case studies are reviewed that demonstrate the SonicScope service’s ability to acquire high-quality acoustic data while drilling into unconsolidated formations with narrow mud weight windows, soft formations, and high-pressure, high-temperature reservoirs. In each instance, the service helped the drillers deliver their wells to target depth, safely and with minimal rig time.

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SonicScope sonic-while-drilling service
SonicScope multipole sonic-while-drilling service delivers real-time and recorded compressional and shear data in both fast and slow formations.
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