Petroleum Engineering 406 Introduction

Introduction Introduction to course Class hours Grading Textbooks Schedule Introduction to Well Control

Introduction Description: (3-0). Credit 3. II Well control; underbalanced drilling; offshore drilling; horizontal, extended, reach, multi-lateral drilling; and fishing operations Prerequisite: PETE 411 Classes: 8:00 – 8:50 a.m. MWF Richardson: 313

Introduction Instructor: Jerome J. Schubert, PE Office: 501K Richardson Hours: 9:00 - 11:00 a.m. TR Phone: 979/862-1195 e-mail: schubert@spindletop.tamu.edu Notes: http://pumpjack.tamu.edu/~schubert

Grading QuizA: 20% Quiz B: 20% Final: 20% Hmwk: 20% Project: 20%

Textbooks Applied Drilling Engineering Well Control Manual Bourgoyne, Chenevert, Millheim, Young Well Control Manual Schubert Handouts, Technical papers, etc.

Course Content Well Control Kicks Blowouts Terminology Basic Well Control Calculations Causes of Kicks Kick Detection Shut-In Procedures

Course Content Well Kill Procedures Equivalent Mud Weights Casing Seat Tests Kick Tolerances Gas Kicks Abnormal Pressure Casing Seat Selection

Course Content Well Control Equipment Unusual Well Control Operations Shallow Gas Subsea Well Control

Course Content Underbalanced Drilling, UBD Introduciton to UBD UBD techniques Benefits Equipment Selecting candidates UBD engineering

Course Content Offshore Drilling Platform Rigs Jackup rigs Floating Drilling

Course Content Dual Gradient Drilling Introduction to DGD U-tube concepts Pressure profiles DGD well control

Petroleum Engineering 406 Lesson 1 Well Control

Well Control Kick Blowout “an unscheduled entry of formation fluids into the wellbore, of sufficient Quantity to require shutting in the well. Blowout Loss of control of a kick

Blowout

Blowouts

Well Control Blowout Blowouts caused by Surface Underground equipment failure human error

Well Control Engineers in office can aid in well control by: Provide pressure profiles for all pending wells Provide offset information such as logs, bit records, mud reports, drilling records. Provide support and assistance personnel on location.

Well Control Terminology Hydrostatic pressure = .052 x MW x TVD

Hydrostatic Pressure Derive HSP equation Calculate the HSP for each of the following: 10,000’ of 12.0 ppg mud 12,000’ of 10.5 ppg mud 5,000’ of 11.2 ppg mud on top of 6,000’ of 16.5 ppg mud

Hydrostatic Pressure Derive HSP equation Weight of fluid = A Area = A, sq.ft. Height = h, ft. Density = MW, ppg Weight of fluid = A*h (ft3)*62.4 lb/ ft3 *MW/8.33 =62.4/8.33*MW*A*h h MW

Hydrostatic Pressure This weight is equally distributed over an area of A sq.ft or 144*A sq. in. Pressure = Weight (force)/area = 62.4*MW*A*h 8.33*144*A P=.052*MW*h where h=TVD

Terminology Pressure Gradient Formation Pressure psi/ft = .052 x MW ppg equivalent Formation Pressure Normal pressure Abnormal pressure Subnormal pressure

Terminology Overburden pressure Fracture pressure function of rock and fluid above zone of interest Fracture pressure

Terminology Pump pressure or system pressure loss

Terminology Slow Pump Pressure Taken: every tour by each driller pumps repaired or liners changed mud properties change every 500’ of hole change in BHA bit nozzles changed

Terminology Surge pressure Swab pressure

Terminology Shut-in drillpipe pressure - SIDPP FP = HSPdp + SIDPP Shut-in casing pressure - SICP FP = HSPcsg mud + HSPinflux + SICP Bottom-hole pressure - BHP BHP = HSP + SIP + Friction + Surge - Swab

U-Tube Concept

Basic Calculations Dia, in - cap, bbl/ft

Basic Calculations Pump Output Duplex Pump Triplex Pump

Basic Calculations

Basic Calculations Kill Weight Mud KWM = SIDPP/(0.052 x TVD) + OWM KWM = FP/(0.052 x TVD)

Weight material to add to increase density