Agenda
- A brief review of ranging techniques
- Project details
- Technical challenges
- The engineered approach - methodology
- Ranging tool response
- A selection of ranging data
- Milling and re-entering the target
- Results
Passive Magnetic Ranging
- MWD detects interference from the adjacent well
- While Drilling logging allows one to identify precise interval over which to acquire ranging data
- Can be transmitted in both sliding and rotary drilling modes
- Useful especially in presence of pipe breaks
Active Ranging While Drilling
- Surface Injection - Patent # 9938773, Moss et al.
- Current injected on surface travels down the pipe
- The current has associated with it a magnetic field
- The MWD sensor can detect the magnetic field while drilling
- A distance and direction can be computed
- Motor highside to target is known at an instant in time – Referenced to gravity HS, Magnetic TF and GYRO TF
Wireline Active Ranging
- What is it?
- Wireline deployed in the drilling well
- Current injection and detection in one assembly
- Array of onboard sensors to detect:
- Magnetic Field
- Gravity field
- Earth spin rate
- Distance and direction from the open hole to the target well
- Specifications
- Detection up to 200’ away
- Direction to target +/- 3°
- Distance to target +/- 10% when in gradient range
...
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Presented by Clinton Moss and Anas Sikal