US 11,952,882 B2
Method for the determination of mud weight window in N-porosity N-permeability formations
Chao Liu, Brookshire, TX (US); Yanhui Han, Houston, TX (US); Dung T. Phan, Brookshire, TX (US); and Younane N. Abousleiman, Norman, OK (US)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by ARAMCO SERVICES COMPANY, Houston, TX (US)
Filed on Jan. 14, 2022, as Appl. No. 17/648,034.
Prior Publication US 2023/0228181 A1, Jul. 20, 2023
Int. Cl. E21B 44/00 (2006.01); E21B 7/04 (2006.01); E21B 21/08 (2006.01); E21B 49/00 (2006.01); G01V 1/30 (2006.01)
CPC E21B 44/00 (2013.01) [E21B 7/04 (2013.01); E21B 21/08 (2013.01); E21B 49/00 (2013.01); G01V 1/306 (2013.01); G01V 2210/624 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
obtaining, by a computer processor, total stresses and pore pressures of each porous medium of a formation using an N-porosity and N-permeability poroelastic wellbore solution;
determining, by the computer processor, a first set of effective stresses for each porous medium and a second set of effective stresses for the formation;
determining, by the computer processor, an individual collapse mud weight and an individual fracturing mud weight for each porous medium of the formation using a first set of associated failure criteria, wherein the first set of associated failure criteria are based on the first set of effective stresses;
determining, by the computer processor, an overall collapse mud weight and an overall fracturing mud weight for the formation using a second set of associated failure criteria, wherein the second set of associated failure criteria is based on the second set of effective stresses;
determining, by the computer processor, a mud weight window for the formation using the individual collapse mud weight, the individual fracturing mud weight, the overall collapse mud weight, and the overall fracturing mud weight; and
transmitting, by the computer processor, a command to a drilling system based on the mud weight window.