公开(公告)号：US20240192155A1

公开(公告)日：2024-06-13

申请号：US18077738

申请日：2022-12-08

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Mahmoud ELSAYED ,  Mohamed MAHMOUD ,  Murtada Saleh ALJAWAD ,  Ammar EL-HUSSEINY ,  Ahmed BINGHANIM

IPC: G01N24/08 ,  G01N15/08 ,  G01N33/24

CPC classification number: G01N24/081 ,  G01N15/08 ,  G01N33/24

Abstract: A method to measure acid diversion efficiency in rock samples. The method includes measuring a first porosity and a permeability of the rock samples. The method includes flooding a core region of the rock sample with a hydrochloric acid (HCl) system to create a wormhole, wherein during the flooding the HCl system penetrates from a first end of the rock sample to a second end of the rock sample to form the wormhole. The method includes measuring a second porosity, a pore size distribution, and a diffusion tortuosity of the rock samples with NMR. The method includes establishing a diversion index (DI) based off a ratio between the diffusion tortuosity in a first direction and the diffusion tortuosity in a second direction. The method includes determining the acid diversion efficiency based off the diversion index.