Experimental Setup for Evaluating Rock Volume Alteration and Its Application for Studying Shale Rock Swelling in Various Fluids

Rock swelling and rock disintegration in the presence of drilling, stimulation and completion fluids are considered to be the main reasons for operational and production problems for wells in clay-rich formations. The impact of these fluids on rock properties shall be established for the effective t...

Full description

Saved in:
Bibliographic Details
Published in:Minerals (Basel) 2022-06, Vol.12 (6), p.714
Main Authors: Yunusov, Timur I., Smirnov, Alexey V., Mukhina, Elena D., Potapenko, Dmitriy I., Bukharov, Dinar F., Baluev, Anatoly A., Cheremisin, Alexey N.
Format: Article
Language:English
Subjects:
Alkaline water
Bazhenov formation
Carbon dioxide
Caustic soda
Clay
clays
Disintegration
Drilling
Drilling fluids
Energy consumption
Evaluation
Experiments
Fluids
hydrocarbon gel
Hydrocarbons
kerogen
Lead
Methods
Minerals
Optimization
Organic matter
Permeability
Polyamines
Potassium
Reservoirs
Rock properties
Rocks
Sediment samples
Sedimentary rocks
Shale
Shales
Swelling
Water
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Rock swelling and rock disintegration in the presence of drilling, stimulation and completion fluids are considered to be the main reasons for operational and production problems for wells in clay-rich formations. The impact of these fluids on rock properties shall be established for the effective treatment design. This paper describes the development of the experimental setup for studying rock swelling in reservoir conditions and the application of this setup for the evaluation of swelling mechanisms of shale rock samples. Swelling quantification was performed using measuring piston displacement that was caused by rock swelling in a piston accumulator during pressure maintenance. We studied the interaction of the disintegrated rock samples with water-based and hydrocarbon-based fluids and supercritical CO2. It was found that alkaline water solution in reservoir conditions causes swelling of the used rock samples in the amount of 1–3% vol. with a direct correlation between the rock swelling magnitude and the total clay content. The change in the rock volume in the presence of the used hydrocarbon-based fluid depends on the content of organic matter, its distribution in the rock, and the clay content. The observed swelling degree in the hydrocarbon fluid and CO2 was significantly lower (0–0.5% vol.) than in water. The proposed methodology and obtained results can further be used for the optimization of various operations in clay-rich formations.
ISSN:2075-163X
2075-163X
DOI:10.3390/min12060714