ADVERTISEMENT

Technology Trends in Evaluating Cement Jobs Using Logging Tools

Cement-job evaluation is a process that identifies whether the objectives of a cement-job operation have been achieved after cement placement. This paper reviews the technology trends in cement-job evaluation using logging tools and considers the main advantages and concerns associated with each technology. The technologies covered are acoustic tools, temperature logging, noise logging, resistivity logs, oxygen-activation logs, X-ray measurements, gamma/gamma density measurements, neutron/neutron logging, and fiber-optic measurements.

Introduction

After a cementing operation has been performed and the cement has set, cement evaluation is conducted either through hydraulic testing or by using various well-logging methods. Verification of casing-cement quality by logging tools has been a contentious subject for the past few decades. On one hand, some experts claim that current technologies are not sufficient to show the sealing capacity and quality of casing cement. On the other hand, others claim that data processing and misinterpretation of the obtained data from cement-job evaluations are the crucial challenges, not the logging technologies. However, another critical element must be considered as a limiting factor—downhole condition. The downhole condition, which includes well parameters and well design, has a major influence on technology development and data interpretation. The well parameters include downhole temperature, downhole pressure, wellbore-fluid properties, casing size and thickness, cement thickness and type, fast formation, slow formation, and unconsolidated formation. Fig. 1 shows the most-likely well design and the worst-case scenarios that need to be considered when developing technology with an assumption that there is no formation washout.

This article, written by Special Publications Editor Adam Wilson, contains highlights of paper SPE 188274, “Technology Trends in Cement-Job Evaluation Using Logging Tools,” by Mahmoud Khalifeh, SPE, University of Stavanger/IRIS; Dave Gardner, SPE, IRIS; and Muhammad Yasser Haddad, University of Stavanger, prepared for the 2017 Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, 13–16 November. The paper has not been peer reviewed.
...
This article is reserved for SPE members and JPT subscribers.
If you would like to continue reading,
please Sign In, JOIN SPE or Subscribe to JPT

Technology Trends in Evaluating Cement Jobs Using Logging Tools

01 May 2018

Volume: 70 | Issue: 5

STAY CONNECTED

Don't miss out on the latest technology delivered to your email weekly.  Sign up for the JPT newsletter.  If you are not logged in, you will receive a confirmation email that you will need to click on to confirm you want to receive the newsletter.

 

ADVERTISEMENT

ADVERTISEMENT

ADVERTISEMENT

ADVERTISEMENT

ADVERTISEMENT