Northside: Case History of Cotton Valley Sand Log Interpretation for a North Louisiana Field

Speaker:  Bruce Ganer
Speaker Bruce Ganer
Bruce has over 40 years of experience in the oil and gas industry. Bruce served in a variety of roles at Pennzoil; most recently as the head of Pennzoil Oil & Gas International’s worldwide technical services. His team of more than 30 was responsible for solving performance problems with oil ...

Bruce has over 40 years of experience in the oil and gas industry. Bruce served in a variety of roles at Pennzoil; most recently as the head of Pennzoil Oil & Gas International’s worldwide technical services. His team of more than 30 was responsible for solving performance problems with oil and gas reservoirs around the world, building positive business relations with foreign governments by enhancing production, improving recoveries, and identifying value-adding opportunities.


In 1997, Bruce founded SPRI and modeled the business after the Pennzoil Global Stewardship prototype. Since its founding, Sierra Pine has grown into an industry-leading reservoir evaluation and geoscience consulting firm. SPRI has worked on some of the most challenging plays for some of the largest operators in the world.


Bruce holds Bachelor of Science degrees in Physics and Mathematics from Central Michigan University and a Master of Science degree in Petroleum Engineering from the University of Houston.

Full Description

Accurate porosity and water saturation determination of Cotton Valley sandstone is difficult because typical porosities are below 12%. In this low porosity range, the errors from log-derived porosity and water saturation values can cause significant misinterpretation of productive potential. Such errors can result from the presence of secondary matrix mineralization, parameters selected to calculate porosity and water saturation, and calibration inaccuracies.


The Cotton Valley sands are a complex intermingling of various minerals and an assortment of carbonates. Carbonates in isolated intervals can account for as much as 50% of the rock matrix. The heavy minerals, when unaccounted for, can result in pessimistic log-derived porosity and, hence, overlooked commercial potential. Also, calibration inaccuracies can result in either optimistic or pessimistic porosity analysis, further confounding commercial evaluation. Variations in grain size coupled with the mineral composition complicate permeability determination. These variables account for the difficulty in predicting reserves in Cotton Valley sand exploration.

Organizer Angela Tse

When?

Thu, Oct. 19, 2017
11:30 a.m. - 1 p.m. US/Central

How Much?

A $5 donation for the SPE-GCS Scholarship Fund has automatically been added to the registration fee. Use OptOut in the Discount Code field if you do not wish to donate at this time.
Event has ended

Where?

Southwestern Energy
10000 Energy Drive
Spring, Texas 77389

Refund Policy: You must notify the SPE-GCS office of your intent to cancel at least 24 hours prior to the event date to receive a refund. For all refund inquiries, email spe-gcs@spe.org. View our Terms & Conditions for more information.