Competency Matrix for Drilling Engineering

SPE Task Force on Minimal Competency

 

 

Task

GENERAL KNOWLEDGE/SKILL

MINIMUM COMPETENCE BREADTH

MINIMUM COMPETENCE DEPTH

ABOVE MINIMUM COMPETENCE

Maintain well control.

Calculate mud weight necessary to maintain well control and volume of mud required to fill the hole while tripping out. Design and/or implement procedure to successfully circulate out an influx. Determine fluid type of influx with data collected after influx. Understand relationship between geologic depth reference and drilling depth reference. Design and/or implement procedure to successfully control an underground blowout.

Develop casing program (sizes, setting depths).

Develop a casing program based a provided pore pressure/frac gradient plot. Understand relationship between desired production flow rates and tubing/casing configuration.

Determine the surface casing setting depth required to protect fresh water sands. Prepare pore pressure and frac pressure versus depth plots.

Optimize the number and depths of protective casings. Optimize the size of the casing strings and liners.

Design casing.

Understand basic design principles (burst, collapse, tension in the pressure/ temperature environment that the casing will encounter).

Design surface, intermediate and production casing/liner to maintain well integrity.

Select optimal casing/ connections for hostile environments (HPHT, H2S, salt, etc.).

Maintain regulatory compliance.

Understand requirement to protect fresh water with surface casing setting depth/cement and requirements on directional programs to stay within lease/block boundaries.

Understand the process required to comply with regulatory requirements. (for example, design an abandonment procedure to isolate zones per regulation or that may cross flow, know what regulatory applications to prepare, and how to verify compliance).

Calculate emissions from rig operations (air pollutants from engine exhaust rates, % oil on cuttings, etc.).

Select the mud program.

Calculate the minimum mud weight required to balance formation pressure for each hole interval.

Design mud program to maintain well control considering casing programs and formation integrity. Select acceptable mud types. Specify mud properties (e.g., density and fluid loss requirements).

Optimize the cost of the mud systems by altering the inhibitive nature of the mud systems. Establish the critical minimum inhibition requirements.

Design a directional well path (including horizontal/ multilaterals).

Understand the relationship between difficulty and lateral displacement.

Select appropriate kickoff points, build rates, required hole angles and bottom hole assemblies.

Optimize the directional program and casing design to avoid key seating. Evaluate casing wear and develop designs to mitigate the problem. Develop a horizontal or multilateral drilling program.

Specify equipment.

Recommend wellhead/BOP ratings to maintain well integrity. Understand performance properties of drill string and BHA components.

Determine BOP stack arrangements, establish test requirements. Calculate ton miles to slip and cut drill line. Calculate slip crushing forces on a landing string. Design equipment components for a fit-for-purpose rig to optimize cost.

Develop procedure to implement formation evaluation program.

Understand hole considerations for successful open hole logging.

Understand interaction between mud composition, hole integrity and types of logs that can be run successfully Design well testing operations procedure for hostile environment (e.g., HPHT, mobile marine drilling unit).

Develop hydraulics program.

Understand basic principles of fluid mechanics and non-Newtonian fluids.

Calculate pressure drop through the system and optimize bit hydraulics. Understand principals of equivalent circulating density.

Integrate hydraulics program with geological setting and mud program.

Develop solids control program.

Understand operations of basic solids control

Size standard solids control equipment (shaker, desander, and desilter) for mud and hydraulics programs.

Design closed loop system with zero discharge.

Design cementing program.

Understand regulatory requirements (fresh water protection, zone isolation, etc.). Understand application of basic cement additives.

Design cement slurries and procedures with sufficient pump time and other characteristics to successfully complete a job. Understand application of specialty cement additives.

Design cement jobs for special situations (shallow water flow, underground blowout, etc).