c8584b23-32ab-511a-e054-002128a47908 English dataset British Geological Survey +44 115 936 3100 Environmental Science Centre,Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-05-02 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13607789 WGS 84 (EPSG::4326) Geochemical Data for the Olla and Nebo-Hemphill Oil Fields, Louisiana (NERC grant NE/L002612/1) 2021-07-19 creation http://data.bgs.ac.uk/id/dataHolding/13607789 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. Chris Ballentine University of Oxford Chair of Geochemistry South Parks Road Oxford OX1 3AN not available originator Rebecca Tyne University of Oxford Postgraduate Department of Earth Science, South Parks Road Oxford OX1 3AN not available originator Peter H Barry Woods Hole Oceanographic Institution Assistant Scientist Woods Hole Oceanographic Institution Falmouth Massachusetts MA 02543 United States not available originator Michael Lawson ExxonMobil Upstream Business Development Senior Geologist not available originator Hao Xie California Institute of Technology Postdoctoral Researcher not available originator Darren J Hillegonds University of Oxford Research Fellow in Analytical Chemistry not available originator John M Eiler California Institute of Technology Professor of Geology and Geochemistry not available originator Enquiries British Geological Survey United Kingdom not available distributor Enquiries British Geological Survey United Kingdom not available pointOfContact notApplicable https://resources.bgs.ac.uk/images/geonetworkThumbs/c8584b23-32ab-511a-e054-002128a47908.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Geochemistry Reservoir fluids BGS Thesaurus of Geosciences 2022 revision NGDC Deposited Data Citable Data dataCentre NERC_DDC otherRestrictions licenceOGL Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" otherRestrictions 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. Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" textTable English geoscientificInformation British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation LA SALLE PARISH (LA) [id=781520] British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation LOUISIANA [id=781500] -92.2200 -92.1400 31.5600 31.8300 2015-03-03 2020-01-31 Comma-separated values (CSV) Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item167342 WWW:DOWNLOAD-1.0-http--download Data download https://doi.org/10.5285/a4070f5d-2064-4caf-a82c-79a786d6af9e WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) information dataset dataset INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology 2011 publication See the referenced specification false Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF false Noble gas samples were collected in Cu tubes and analysed by mass spectrometry in the Noble Lab at the University of Oxford. Clumped methane and stable isotope samples were collected in pre-evacuated gas cylinders and analysed by mass spectrometry at the California Institute of Technology and Isotech Inc. respectively.