ADVERTISEMENT

Horizontal-Well Correlation in Geosteering Complex Reservoirs of Saudi Arabia

A new workflow technology has been launched that uses real-time logging-while-drilling (LWD) data and a new horizontal well-correlation technique to dynamically update a structural framework that can be used to geosteer an active drilling well. The benefits of this new approach include faster well-log interpretation and the ability to dynamically and more-accurately update the subsurface model during drilling to efficiently steer the wellbore into the most productive parts of conventional and unconventional reservoirs.

Introduction

With increased competition in the energy market, oil companies face the constant challenge of improving accuracy while reducing cycle time. This goal has driven the advancement of technologies in horizontal drilling, real-time monitoring, and geological interpretation significantly during the last few years.

Previous well-correlation workflows used by Saudi Aramco were typically limited to applying the vertical-well approach even when drilling horizontal wells. This approach involved transforming the well logs from a measured-depth domain to a true-vertical-depth (TVD) domain and introducing some degree of uncertainty. However, accurate correlations using TVD can be obtained only in vertical wells or wells drilled through beds with no structural dip. TVD well correlations become meaningless when deviated wells penetrate dipping beds. This approach poses another problem in that the subsurface layers and the structural-framework model are not dynamically updated while drilling, which may negatively affect the accuracy of well planning, interpretation, and geosteering.

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 164151, “Horizontal-Well Correlation Using Real-Time Data and Log Prediction in Geosteering Complex Reservoirs of Saudi Arabia,” by Abdul Mohsen A. Al-Maskeen, Roger R. Sung, and Sadaqat S. Ali, Saudi Aramco, prepared for the 2013 SPE Middle East Oil and Gas Show and Conference, Manama, Bahrain, 10–13 March. The paper has not been peer reviewed.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

Horizontal-Well Correlation in Geosteering Complex Reservoirs of Saudi Arabia

01 November 2013

Volume: 65 | Issue: 11

ADVERTISEMENT


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