Petroleum drilling fundamentals Sigve Aspelund Hamilton

Petroleum Drilling Fundamentals

Introduction to Rig types and Drill Component

Rig Selection and basic planning steps

Types of wells Types of rigsSteps to drill oil or gas wells The well construction team Well costingCommunications and safety

issues.

Basic pore pressure and fracture gradient estimation

Units and terminology and basic definitions Geo pressure and well design consideration Causes of overpressurePore pressure theoryReal time diagnostics of pore pressure Overburden gradient estimationFracture gradient estimation LOT analysisCasing seat selectionUncertainty analysis.

Designing the well Translating the geological prognosis into a well design Rig selection Types of drilling rigs – onshore and offshore Drilling equipment The rotary system – conventional, top drive, rotary steerable Automated rigs Contractor selection Casing and Cementing Drilling muds and completion fluids; types and functions Bits and specialised drilling equipment Formation and well evaluation requirements: Mud logging Wireline and MWD/LWD logging Case Study: Casing design including uncertainties in

pressure and rock strength Case Study: Identification of potential drilling hazards

Drilling the wellMonitoring progress in drilling operations The daily drilling report – what does it contain

and how do you read it? Well control issues – why the drilling foreman

needs a certificate: Mud control and testing Casing and cementing operations Things that can go wrong Stuck pipeOverpressuresLost circulationKicks

Completing the wellTypes of completions – what is their

function? Completion fluids – why are they

different from drilling fluids? Basic completion string equipment

and Xmas trees Sand control equipment – from

screens to gravel packs Perforation technology – equipment

and safety aspects

New technology & ideas“Drilling the limit” how to

improve and save money Expandable tubulars Multi-lateral wells Smart wells (Intelligent

completions)