Well Surveying

Why do we survey a well?

• To know where reservoir is

• In case we have to drill relief well

• It is an illegal requirement in some contries

• To avoid other wells

• To learn where difficult/problematic formation are so they can be avoided

What does number 5 in the picture indicate?

• Surface Location

• Target Area

• Vertical Section Plane

• Vertical Section Azimuth

• Survey Point

What type of the well profile is this?

• S-Type

• Vertical

• J-Type

• L-Type

• Horizontal

What is the inclination of a survey point?

• The length of the projection of the horizontal displacement onto the vertical plane of projection

• The angle between the wellbore and the vertical at the survey point

• The measure depth projected onto a vertical plane

• The Angle between the horizontal projection of the wellbore and true north at the survey point

What does number 3 in the picture indicate?

• Vertical Section Departure

• Target Area

• Survey Point

• Vertical Section Azimuth

• Vertical Section Plane

What is the azimuth or direction of a survey point?

• The length of the projection of the horizontal displacement onto the vertical plane of projection

• The angle between the wellbore and the vertical at the survey point

• The measure depth projected onto a vertical plane

• The Angle between the horizontal projection of the wellbore and true north at the survey point

What does number 2 in the picture indicate?

• Vertical Section Departure

• Target Area

• Survey Point

• Vertical Section Azimuth

• Vertical Section Plane

Label the measurements of the downhole survey at the indicated point, choose from the list:

• Inclination 30deg

• Azimuth 60deg

• Inclination 60deg

• Depth 200ft

• Azimuth 170deg

Label the measurements of the downhole survey at the indicated point, choose from the list:

• Inclination 60deg

• Depth 2000ft

• Inclination 45deg

• Azimuth 60deg

• Azimuth 230deg

What does number 4 in the picture indicate?

• Vertical Section Departure

• Target Area

• Vertical Section Plane

• Vertical Section Azimuth

• Survey Point