ISO/NP 26652

Natural gas upstream area — Determination of linear swelling ratio of shale under the action of fluid using dilatometer

Scope

This document specifies the terms and definitions, principles and methods, apparatus and materials, sample requirements and preparation, testing, calculation of shale linear swelling ratio, precision, and requirements and procedures for reporting when the linear swelling ratio of shale in water-based fluids is determined using a dilatometer.
This document is applicable to the testing of rock samples delivered to the laboratory. The collection and preparation of rock samples are not covered by this document.
This document is applicable to the assessment of wellbore collapse, permeability impairment and other risks caused by shale swelling after interaction with downhole working fluids, as well as to the guidance of liquid system and formulation optimization.