Well Testing Analysis(Introduction)

Introduction to Well TestingObjectives• List the more common objectives of well testing.• Describe the diffusivity equation by explaining– its purpose and applications– assumptions made in its derivation and how it isderived– its form for one-dimensional radial flow.• List, define, give the units for, and specify typical sourcesfor each...

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Drilling and Completion of Multilateral Wells

MULTILATERAL  TERMINOLOGIES  —Laterals are wellbores drilled from the main wellbore.  — — Wellbores drilled from a horizontal lateral into the horizontal plane  are branches, those drilled from horizontal lateral into the vertical plane are splays. — —A multilateral well can follow different well trajectories:...

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New Strategies for Designing the Horizontal Well Profiles

There are three sections, namely: 1.   Vertical section: It is drilled from sea bed (mud  line) until KOP (the point  where deviating or sidetracking begins).   2-Turned (Curved or angle-build) section: It is drilled from KOP to the end-of-curve (EOC). This section includes the first-build arc, the straight...

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Horizontal Drilling Problems

WOB (Weight On Bit) Conventional bit weight for efficient drilling is about 2000-5000 lbf per inch of bit diameter. Motor assemblies are more efficient with bit weight less than rotary assemblies. Bit weight may be increased by reducing drag and torque and by using the split assembly .        Torque and...

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