Double Header Technical Meeting and Luncheon: Tuesday, November 11, 2014

Where: The Petroleum Club of Lafayette

When: 11:30am

Lunch: $20.00 for members ** Be Sure to Bring Your 2014-2015 Membership Dues!**

Luncheon Talks:  

Getting the Last Few Drops out of a Large Oil Reservoir in South Timbalier 52 Field, Gulf of Mexico BY: Dave Fugitt

ABSTRACT

Chevron has put an emphasis on increasing the recovery in its existing reservoirs through better reservoir management. The 9000’ sand reservoir “B” is the single largest oil reservoir in South Timbalier 52 Field. It has produced over 26 MMBO (million bar- rels of oil) and 24 BCFG (billion cubic ft of gas) since the start of production in 1984. The 9000’ sand is a thick deltaic sand with a 140 ft hydrocarbon column. The reservoir was initially developed with seven wells in the mid-1980s; individual well production ranged from 2 MMBO to 5.7 MMBO. In 1999, Chevron drilled an updip well, the 14ST2, to drain the attic reserves in the field. This well has produced almost 1 MMBO to date. In 2012, Chevron approved an additional attic well, the 13ST2, about 1900 ft south of the earlier 14ST2 well. The location was based on a study of the water cuts of the producing wells in the reservoir through time and the spacing of the remaining pro- ducers. Prior to the drilling of this well in 2013, the asset team tried to identify other areas of the reservoir that might have bypassed reserves by looking at multiple pulsed neutron logs that had been run in the producing wells over time. The pulsed neutron logs showed an uneven movement of the water contact and suggested that individual wells were only draining oil from a radius of between 800 and 1500 ft around the well- bore. This was confirmed by the results of the 13ST2 well, which found an oil-water contact over 30 ft lower than the contact in the 14ST2 well. The 13ST2 well was put on production with an initial rate of over 500 BOPD (barrels of oil per day). The pulsed neutron log study indicated there was remaining undrained oil in the northern part of the reservoir. Chevron is planning to drill a well in that area in 2014. The asset team gained a better understanding of the 9000’ reservoir and how it produced by looking at historical pulsed neutron logs and water cut information through time. Applying this knowledge has led to increased recovery of the original oil in place.

SPEAKER BIO

David Fugitt is a senior asset development geologist with the Chevron Gulf of Mexico Business Unit and is based in Lafayette, Louisiana, U.S.  He joined Chevron in 1978 after receiving a bachelor’s degree in geology from The Ohio State University in 1976, and a master’s degree from Texas A&M University in 1978. Mr. Fugitt was a speaker at the 2014 GCAGS Annual Convention.

AND

Interpretation Visualization in the Petroleum Industry – Research in Halokinetics through new visualization tools and techniques BY: Robert Woock

ABSTRACT

Current high end visualization (Insight Earth) of various salt and sediment features in the GOM from use of watershedding, co-rendering and other visualization technologies leads to insights. These insights include economically important findings related to structural history, depositional stratigraphy and drilling environment parameters. Examples include a documented thrusted extrusive body near Mad Dog and the documented Rum roho allochthonous salt sheets as originally detailed by Schuster (AAPG Memoir 65, 1995) and Hudec (AAPG 2008Annual Convention Abstracts) and other authors. Watershedding is a descriptive term for volume segmentation, which is a statistical technique for dividing a volume into different regions as demonstrated by use of a watershed algorithm. This algorithm separates a volume into regions based on the grayscale value of an attribute, and falls into the class of algorithms that are used for image processing. The result is the creation of enclosed, contoured regions called “basins” and “watersheds” that mark the division of discrete regions based on a selection criterion within an area of interest. Segmenting the structural analysis of a seismic volume in this fashion allows for the creation of attributes that may be useful for structural interpretation, seismic facies analysis, and geologic reservoir modeling. Watershedding yields internal structural details within salt bodies which are difficult to discriminate on typical reflectivity data due to low reflectivity or low reflectivity contrast. The ability to see internal salt structure gives the interpreter the opportunity to image overturned sections near the base of salt bodies and recurrent toe thrusts which resemble offset stacked anvils. Identifying and mapping these features can lead to the ability to characterize intra-salt boundaries for drilling risks. Visualizations of the Rum roho enhance understanding of regional and local stresses. Inferences of pre-roho stratigraphy may impact many phases of asset assessment.

SPEAKER BIO

Rob is a geophysicist with 36 years of professional experience. He has enjoyed working with several majors and independents applying Basin Modeling, portfolio analysis, play fairway analysis, and confidence analysis. He has worked the GOM, Gulf Coast, various onshore resource plays, China, Gabon, Benin, Ivory Coast, NW Africa, and West Africa, Qatar, and other areas in the Middle East region. Rob has presented and published on hydrocarbon detection and delineation techniques in the various venues and has collaborated on several other published topics.

He is married to Cresside (Daigle) from New Orleans where they both enjoyed league soccer for many years. They have three wonderful children and are picking up new and old hobbies since the nest is empty. In their spare time they are busy establishing a new farm venture called Beka. Rob has a SEL private pilot’s license and would like to get an instrument rating someday. Sailing as also been a lifelong interest.

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