Schlumberger

Drilling The First Well

Overview Technologies

Multiple measurements to reduce uncertainty

Taking measurements to determine pore pressures, well placement and trajectory, and well integrity, as well as acquiring seismic while drilling is critical to reduce uncertainty ahead of the bit.

Pore pressure studies and management

Predicting pore pressures is key to designing a geomechanics-based wellbore stability model. A velocity model obtained from seismic data is the key input to pressure inversion. Applied to 2D and 3D volumes, a proprietary method uses every seismic trace and time sample for low-frequency velocity model building.

Well trajectory

Using a field-scale predictive model helps to choose well placement and trajectory options that give the most flexibility to the well design. The analysis uses different sources of information which can include 3D seismic, geophysical logs acquired while drilling and on wireline, and drilling event analysis, to generate a comprehensive 3D mechanical earth model (MEM).

Seismic while drilling

Seismic data acquired downhole relates seismic time measurements to depth, as well as illuminating near-wellbore formations. Borehole seismic data can be obtained while drilling using wireline logging technology. The latest Q-Borehole integrated seismic system, combined with LWD, delivers traditional borehole seismic measurements, real-time checkshots, and interval velocity data to reduce uncertainty ahead of the bit.

Barriers for well integrity

Drilling fluid selections are critical as they represent a primary barrier to maintain well integrity. Regional data assists in determining the formulations to maintain wellbore stability, optimize ROP, control costs, enable formation evaluation, and minimize HSE footprint.

Cement placement ensures casing mechanical support, protection from fluid corrosion, and isolation of permeable zones at different pressure regimes to prevent hydraulic communication.

Cement evaluation tools measure the bond between the casing and the cement placed in the wellbore annulus between the casing and wellbore. The detection of poor cement, or the absence of cement, can lead to remedial action before the well is completed, avoiding potential well problems and the associated costs and hazards.

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A Glance at Some of the New Functionality in Petrel 2013

EAGE 2013
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