Offshore wells drilled in ultra-deep waters have a narrower operating window (difference between pore gradient and fracture gradient). From this it is correct that: a) Overload stress is higher in ultra-deep offshore wells, due to the high water depth, which considerably increases the pore gradient, bringing it closer to the fracture gradient. b) Overload stress is lower in ultra-deep offshore wells, due to the replacement of a high thickness of sediments by a high water depth, which reduces the efforts transmitted to the buried formations, considerably reducing the fracture stress. c) Narrow operating window results in a simpler well design, with fewer phases to be drilled.

Offshore wells drilled in ultra-deep waters have a narrower operating window (difference between pore gradient and fracture gradient). From this it is correct that: a) Overload stress is higher in ultra-deep offshore wells, due to the high water depth, which considerably increases the pore gradient, bringing it closer to the fracture gradient. b) Overload stress is lower in ultra-deep offshore wells, due to the replacement of a high thickness of sediments by a high water depth, which reduces the efforts transmitted to the buried formations, considerably reducing the fracture stress. c) Narrow operating window results in a simpler well design, with fewer phases to be drilled.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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