Introduction:
This is designed for exploration, engineering and drilling personnel involved in making operational decisions based on DST results, who use DST data in general exploration/exploitation work.
Course Objectives:
By the end of the course, students should be able to accomplish the following:
- Diagnose damage, depletion, and mechanical malfunctions, such as tool plugging
- Determine permeability and forecast the stable flow rate if the well is completed
- Understand why data from cores and logs often conflict with DST data
- Make more sense of DST results printed in PIX well cards and field reports
- Make a decision as to whether to complete or abandon a wildcat with only marginal DST results
- Appreciate where recoveries of “oil cut mud” and gas rates of “TSTM” may be significant from an exploration standpoint
- Identify long narrow reservoirs (such as channel sands) from DST pressure behavior
- Design DSTS which preserve secrecy where competitors control adjacent land blocks
- Estimate the time until a well stabilizes
- Fully understand closed chamber DSTS
Who Should Attend?
This 5-day practical course is directed at exploration, engineering and drilling personnel concerned with making operational decisions based on DST results or who use DST data in general exploration/exploitation work. It is very useful for geologists evaluating old wells with DSTs for land acquisition.
Course Outlines:
- Well Engineering & Operations
- Drilling fluids and cementing
- Well-site data acquisition and quality control
- Well Delivery Process
- Rig Types and Personnel
- Types of rigs
- Land rigs
- Rig components
- Offshore rigs: jack-up rigs, submersible rigs, platform rigs, semi-submersible rigs, drill ships
- Rolling Cutter Bit
- Bit types
- Specification
- Grading worn bit
- Bit performance
- Types of DST’s (Straddle, Bottom Hole, Multiple Resets) and Their Applications
- Using DST Charts to Recognize Formation Damage
- Flow rate Estimation in Low Oil Rate DST’s
- Type Curves and Other Interpretive Plots
- Differentiating Between True Depletion and ‘Supercharge
- Completion-Abandonment Decisions Based on Marginal DST Results
- Closed Chamber DST Applications – Tight Gas, Sour Gas, Secrecy
- Significance of ‘Oil Cut Mud’ Recoveries and ‘TSTM’ Gas Rates