SIST EN ISO 10426-2:2004/A1:2005

Petroleum and natural gas industries - Cements and materials for well cementing - Part 2: Testing of well cements - Amendment 1: Water-wetting capability testing (ISO 10426-2:2003/A1:2005)

Erdöl- und Erdgasindustrie - Zemente und Materialien für die Zementation von Tiefbohrungen - Teil 2: Prüfungen für Bohrloch-Zemente (ISO 10426-2:2003/A1:2005)

Industries du pétrole et du gaz naturel - Ciments et matériaux pour la cimentation des puits - Partie 2: Essais de ciment pour puits - Amendement 1: Essai de mouillabilité a l'eau (ISO 10426-2:2003/A1:2005)

Industrija za predelavo nafte in zemeljskega plina – Cementi in materiali za cementiranje vrtin – 2. del: Preskušanje cementov za vrtine – Dopolnilo 1: Preskušanje sposobnosti omočenja (ISO 10426-2:2003/A1:2005)

General Information

• Status: Published
• Publication Date: 30-Nov-2005
• ICS: 75.180.10 - Exploratory, drilling and extraction equipment
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2005
• Due Date: 01-Dec-2005
• Completion Date: 01-Dec-2005
• Ref Project: EN ISO 10426-2:2003/A1:2005 - Petroleum and natural gas industries - Cements and materials for well cementing - Part 2: Testing of well cements - Amendment 1: Water-wetting capability testing (ISO 10426-2:2003/A1:2005)

Relations

• Amends: SIST EN ISO 10426-2:2004 - Petroleum and natural gas industries - Cements and materials for well cementing - Part 2: Testing of well cements (ISO 10426-2:2003)
• Effective Date: 01-Dec-2005
• Revises: oSIST prEN ISO 10426-2:2019 - Petroleum and natural gas industries - Cements and materials for well cementing - Part 2: Testing of well cements (ISO/DIS 10426-2:2019)
• Effective Date: 18-Jan-2023
• Revised: oSIST prEN ISO 10426-2:2019 - Petroleum and natural gas industries - Cements and materials for well cementing - Part 2: Testing of well cements (ISO/DIS 10426-2:2019)
• Effective Date: 12-Jun-2019

Overview

EN ISO 10426-2:2003/A1:2005 is an amendment to ISO 10426-2 (Part 2: Testing of well cements) published by CEN/ISO for the petroleum and natural gas industries. Amendment A1 adds a standardized Water‑Wetting Capability Test (WWCT) to evaluate how well spacers and preflushes restore a water‑wet condition to surfaces exposed to oil‑ and synthetic‑based drilling fluids - a key factor for achieving reliable cement bonding and well integrity.

Key topics and technical requirements

• Scope of the WWCT

  • Designed to assess the apparent water‑wetting capability of aqueous spacers/preflushes against oil‑wetted surfaces.
  • Not intended for bulk displacement assessment or direct spacer/mud compatibility testing.
  • Not suitable for non‑aqueous or non‑conductive systems, or mixtures of surfactants in base oils.

• Definitions

  • Adds the term water‑wetting capability: capability of a fluid to produce or restore a water‑wetted state (fully water‑wet is most desirable for cement bonding).

• Method and apparatus

  • Continuous measurement of electrical conductivity between electrodes. The test infers emulsion state and wettability when the titrant spacer is conductive and the titrated drilling fluid is non‑conductive (oil‑external).
  • Typical sample volume: ~500 ml per test.
  • Test limited to atmospheric pressure and temperatures ≤ 90 °C (194 °F). For conditioning above 90 °C, use HTHP equipment and cool below 90 °C before depressurizing.

• Sample preparation and procedure

  • Prepare mud per supplier instructions; condition spacer fluids to anticipated BHCT (Bottom Hole Circulating Temperature).
  • Slowly titrate conductive spacer into non‑conductive mud while stirring; monitor conductivity until a stable reading indicates a water‑continuous phase (water‑wet).
  • Report results as volume percentage V = Vs / (Vs + Vm) × 100, where Vs = volume of spacer required and Vm = initial mud volume (example: 150 ml spacer + 200 ml mud → 43%).

• Safety

  • Follow laboratory safety for oil/synthetic/solvent fluids; observe flash points, ventilation, and handling procedures.

Applications and users

• Used by drilling and cementing engineers, mud engineers, laboratory testing services, oilfield service companies, and well integrity specialists to:
  • Select appropriate preflushes, spacers, or surfactant components before cementing.
  • Demonstrate the ability of spacer systems to restore water‑wet surfaces after oil‑based drilling fluids.
  • Support cement bond quality assurance and reduce gas migration risks.

Related standards

• This amendment is part of ISO 10426‑2 (Testing of well cements), prepared by ISO/TC 67 (materials and equipment for petroleum and natural gas industries). Users should consult the main ISO 10426‑2 document for full cement testing methods and requirements.

Keywords: well cementing, water‑wetting capability, WWCT, spacer testing, preflush, oil‑based drilling fluids, cement bonding, ISO 10426‑2, EN ISO 10426‑2:2003/A1:2005.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2005
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FHPHQWLUDQMHYUWLQ±GHO3UHVNXãDQMHFHPHQWRY]DYUWLQH±'RSROQLOR
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Petroleum and natural gas industries - Cements and materials for well cementing - Part
2: Testing of well cements - Amendment 1: Water-wetting capability testing (ISO 10426-
2:2003/A1:2005)
Erdöl- und Erdgasindustrie - Zemente und Materialien für die Zementation von
Tiefbohrungen - Teil 2: Prüfungen für Bohrloch-Zemente (ISO 10426-2:2003/A1:2005)
Industries du pétrole et du gaz naturel - Ciments et matériaux pour la cimentation des
puits - Partie 2: Essais de ciment pour puits - Amendement 1: Essai de mouillabilité a
l'eau (ISO 10426-2:2003/A1:2005)
Ta slovenski standard je istoveten z: EN ISO 10426-2:2003/A1:2005
ICS:
75.180.10 Oprema za raziskovanje in Exploratory and extraction
odkopavanje equipment
91.100.10 Cement. Mavec. Apno. Malta Cement. Gypsum. Lime.
Mortar
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 10426-2:2003/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2005
ICS 75.020; 91.100.10
English Version
Petroleum and natural gas industries - Cements and materials
for well cementing - Part 2: Testing of well cements -
Amendment 1: Water-wetting capability testing (ISO 10426-
2:2003/A1:2005)
Industries du pétrole et du gaz naturel - Ciments et Erdöl- und Erdgasindustrie - Zemente und Materialien für
matériaux pour la cimentation des puits - Partie 2: Essais die Zementation von Tiefbohrungen - Teil 2: Prüfungen für
de ciment pour puits - Amendement 1: Essai de Bohrloch-Zemente (ISO 10426-2:2003/A1:2005)
mouillabilité à l'eau (ISO 10426-2:2003/A1:2005)
This amendment A1 modifies the European Standard EN ISO 10426-2:2003; it was approved by CEN on 13 August 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this
amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references concerning such
national standards may be obtained on application to the Central Secretariat or to any CEN member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10426-2:2003/A1:2005: E
worldwide for CEN national Members.

Foreword
This document (EN ISO 10426-2:2003/A1:2005) has been prepared by Technical Committee
ISO/TC 67 "Materials, equipment and offshore structures for petroleum and natural gas
industries" in collaboration with Technical Committee CEN/TC 12 "Materials, equipment and
offshore structures for petroleum and natural gas industries", the secretariat of which is held by
AFNOR.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by March 2006, and conflicting national
standards shall be withdrawn at the latest by March 2006.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Endorsement notice
The text of ISO 10426-2:2003 has been approved by CEN as EN ISO 10426-2:2003/A1:2005
without any modifications.
INTERNATIONAL ISO
STANDARD 10426-2
First edition
2003-10-15
AMENDMENT 1
2005-09-01
Petroleum and natural gas industries —
Cements and materials for well
cementing —
Part 2:
Testing of well cements
AMENDMENT 1: Water-wetting capability
testing
Industries du pétrole et du gaz naturel — Ciments et matériaux pour la
cimentation des puits —
Partie 2: Essais de ciment pour puits
AMENDEMENT 1: Essai de mouillabilité à l'eau

Reference number
ISO 10426-2:2003/Amd.1:2005(E)
©
ISO 2005
ISO 10426-2:2003/Amd.1:2005(E)
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ISO 10426-2:2003/Amd.1:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing Inte
...