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1. (WO2018185099) DRILLING METHOD SUITABLE FOR WELLS FOR THE INJECTION OR PRODUCTION OF A GAS OR OIL RESERVOIR

Pub. No.:    WO/2018/185099    International Application No.:    PCT/EP2018/058487
Publication Date: Fri Oct 12 01:59:59 CEST 2018 International Filing Date: Wed Apr 04 01:59:59 CEST 2018
IPC: E21B 21/00
E21B 49/00
G01V 99/00
Applicants: REPSOL, S.A.
Inventors: ALVARELLOS IGLESIAS, Jose
SEGURA SERRA, José María
IBAÑEZ MARTINEZ, Enric
MOOKANAHALLIPATNA RAMASESHA, Lakshmikantha
Title: DRILLING METHOD SUITABLE FOR WELLS FOR THE INJECTION OR PRODUCTION OF A GAS OR OIL RESERVOIR
Abstract:
The present invention relates to a drilling method suitable for wells for the injection and production of a gas or oil reservoir. Other uses are in mining and civil engineering work. This method is characterized by the use of the estimation of damage in a plurality of sections along the well to establish the optimal parameters assuring the discharge of caving material without ever reaching the maximum discharge capacity. According to one embodiment, the drilling parameters are determined through an estimation of damage using a set of analytical steps in which not only is the caving angle taken into account, but also the area of damage in each of the sections of the well. This analytical method also allows assessing both the width and the depth of damage in the wall of the well.