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Geochemical Data for the Olla and Nebo-Hemphill Oil Fields, Louisiana (NERC grant NE/L002612/1)

Publisher
British Geological Survey (BGS)
Updated
28 August 2026
Topic
Not set
Licence
Not set

Summary

Formation water geochemistry and gas geochemistry from 6 wells in the Olla Oil Field and 7 wells in the Nebo-Hemphill Oil Field Louisiana (Longitude range: -92.2297 to -92.1487, Latitude range: 31.83128 to 31.56586.), sampled in 2015. Formation water geochemistry for cation and anions and in mmol/l and ppm, these were measured at an internal ExxonMobil facility. Casing gases were used to make the remaining measurements. Stable noble gas isotopes (He, Ne, Ar, Kr, Xe) were measured at the University of Oxford Noble Lab for ratios and abundances (in cm3(STP)/cm3). Stable C isotopes of CO2 and CH4 and C2, C3 and C4 alkanes in ‰ VDPB as well as their mol% of the casing gas were measured by Isotech Inc.. Methane clumped isotopes are given as Δ12CH2D2 and Δ13CH3D and were measured at the California Institute of Technology. Where no data is present, no measurements were taken for that well. N.D. refers to not detectable.

Data links

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Citation Information - Digital Object Identifier (DOI) 28/8/2026
Data 28/8/2026

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Additional information

Source Metadata
XML, HTML
Date added
28 August 2026
Harvest GUID
c8584b23-32ab-511a-e054-002128a47908
Extent (Latitude)
31.8300° to 31.5600°
Extent (Longitude)
-92.2200° to -92.1400°
Dataset reference date (creation)
2021-07-19
Frequency of update
notApplicable
Access constraints
The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.
Responsible party
University of Oxford (originator); Woods Hole Oceanographic Institution (originator); ExxonMobil Upstream Business Development (originator); California Institute of Technology (originator); British Geological Survey (distributor, pointOfContact)
ISO 19139 resource type
dataset
Metadata language
eng

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