{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T15:55:43Z","timestamp":1791302143545,"version":"4.1.0"},"reference-count":50,"publisher":"American Chemical Society (ACS)","issue":"39","license":[{"start":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T00:00:00Z","timestamp":1790467200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,10,6]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Core sample measurements and well logs were integrated to evaluate reservoir petrophysical properties and develop more precise models for oil production. These logs are frequently used to generate cross-plots that reveal underlying patterns and assist in reservoir classification. In this study, cross-plots helped characterize the petrophysics of Namorado sandstone and Enchova limestone reservoirs in the Campos Basin, southeastern Brazil. Hingle, Pickett, Buckles, Neutron-Density, and M-N cross-plots were created from basic logs obtained from a single borehole in each oilfield. The estimated sonic porosity aligns with laboratory measurements of effective porosity and is more suitable for reservoir calculations, offering nearly continuous, full-interval estimates. Results show that transit time in the Enchova reservoir is slightly higher than in Namorado, while formation water resistivity, matrix density, and irreducible water saturation are similar. The limestone reservoir holds more water, and a higher formation water resistivity suggests it contains more oil in its pores. This study underscores the usefulness and efficiency of cross-plots for petrophysical assessment, highlighting their role as vital tools for quickly visualizing data and understanding relationships among multiple properties.<\/jats:p>","DOI":"10.1021\/acsomega.6c01355","type":"journal-article","created":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T19:01:46Z","timestamp":1790535706000},"page":"58645-58659","source":"Crossref","is-referenced-by-count":0,"title":["Advantages, Utility, and Efficiency of Geophysical\nWell Log Cross-Plots to Evaluate the Petrophysical Properties of Oil\nReservoirs"],"prefix":"10.1021","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3353-1011","authenticated-orcid":true,"given":"Abel","family":"Carrasquilla","sequence":"first","affiliation":[{"name":"Universidade Estadual do Norte Fluminense Darcy Ribeiro , , Av. Alberto Lamego, 2000, Parque Califo\u0301rnia, Campos dos Goytacazes , ,","place":["Rio de Janeiro, Brazil, 28013-602"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Herson","family":"da Rocha","sequence":"additional","affiliation":[{"name":"Universidade Federal do Rio de Janeiro, Cidade Universita\u0301ria , , Ilha do Funda\u0303o, Av. Pedro Calmon, 550 , Zip Code ,","place":["Rio de Janeiro, Brazil, 21941-901"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rodrigo","family":"da Silva","sequence":"additional","affiliation":[{"name":"Universidade Estadual do Norte Fluminense Darcy Ribeiro , , Av. Alberto Lamego, 2000, Parque Califo\u0301rnia, Campos dos Goytacazes , ,","place":["Rio de Janeiro, Brazil, 28013-602"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,9,27]]},"reference":[{"key":"2026100610470343000_cit1","doi-asserted-by":"publisher","first-page":"539","DOI":"10.4314\/jasem.v19i3.25","article-title":"Cross-plotting\nof rock properties\nfor fluid and lithology discrimination using well data in a Niger\nDelta oilfield","volume":"19","author":"Bello","year":"2015","journal-title":"J. Appl. Sci. Environ. Manage."},{"issue":"7","key":"2026100610470343000_cit2","doi-asserted-by":"publisher","first-page":"2575","DOI":"10.3390\/en15072575","article-title":"A visualization\nand\nanalysis method by multi-dimensional cross-plots from multi-well heterogeneous\ndata","volume":"15","author":"Cao","year":"2022","journal-title":"Energies"},{"key":"2026100610470343000_cit3","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-662-04627-2","volume-title":"Geological Well Logs:\nTheir Use in Reservoir Modeling","author":"Luthi","year":"2001"},{"key":"2026100610470343000_cit4","doi-asserted-by":"publisher","first-page":"106372","DOI":"10.1016\/j.petrol.2019.106372","article-title":"Petrophysical characterization\nusing well log resistivity and rock grain specific surface area in\na fractured carbonate pre-salt reservoir in the Santos Basin, Brazil","volume":"183","author":"Rocha","year":"2019","journal-title":"J. Pet. Sci. Eng."},{"key":"2026100610470343000_cit5","doi-asserted-by":"publisher","first-page":"180","DOI":"10.24273\/jgeet.2018.3.4.1318","article-title":"Cross-plot analysis\nof rock properties from well log data for gas detection in X-field,\ncoastal swamp Depobelt, Niger Delta Basin","volume":"3","author":"Austin","year":"2018","journal-title":"J.\nGeosci. Eng., Environ. Technol."},{"issue":"4","key":"2026100610470343000_cit6","doi-asserted-by":"publisher","first-page":"433","DOI":"10.1306\/D81D7907-BE2B-4392-B4CF386E6BB0A399","article-title":"Integration\nof geology, petrophysics, and reservoir engineering for characterization\nof carbonate reservoirs through Pickett plots","volume":"88","author":"Aguilera","year":"2004","journal-title":"AAPG Bull."},{"key":"2026100610470343000_cit7","doi-asserted-by":"publisher","DOI":"10.15530\/urtec-2025-4216697","article-title":"Modernizing petrophysical\ninterpretation in unconventional reservoirs by integrating advanced\nwell logs and core analysis in high-definition wells","volume-title":"SPE\/AAPG\/SEG Unconventional Resources Technology Conference","author":"Haijing","year":"2025"},{"key":"2026100610470343000_cit8","doi-asserted-by":"publisher","first-page":"104672","DOI":"10.1016\/j.earscirev.2023.104672","article-title":"Comprehensive review of CO2 geological storage: exploring principles, mechanisms, and prospects","volume":"249","author":"Bashir","year":"2024","journal-title":"Earth-Sci. Rev."},{"key":"2026100610470343000_cit9","doi-asserted-by":"publisher","first-page":"135987","DOI":"10.1016\/j.cej.2022.135987","article-title":"Coupled miscible\ncarbon utilization-storage processes\nin fractured shales","volume":"441","author":"Zhang","year":"2022","journal-title":"Chem. Eng. J."},{"issue":"3","key":"2026100610470343000_cit10","doi-asserted-by":"publisher","first-page":"0094","DOI":"10.1029\/2022GL101431","article-title":"Strategy to\nenhance geological CO2 storage capacity in saline aquifers","volume":"50","author":"Li","year":"2023","journal-title":"Geophys. Res. Lett."},{"issue":"14","key":"2026100610470343000_cit11","doi-asserted-by":"publisher","first-page":"0094","DOI":"10.1029\/2024GL109913","article-title":"Assessing subsurface gas storage\nsecurity for climate change mitigation and energy transition","volume":"51","author":"Pan","year":"2024","journal-title":"Geophys. Res. Lett."},{"key":"2026100610470343000_cit12","doi-asserted-by":"publisher","first-page":"363","DOI":"10.1038\/s41596-024-01049-0","article-title":"Interfacial property\ndetermination from dynamic pendant-drop characterizations","volume":"20","author":"Pan","year":"2025","journal-title":"Nat. Protoc."},{"issue":"Part 1","key":"2026100610470343000_cit13","doi-asserted-by":"publisher","first-page":"138409","DOI":"10.1016\/j.jcis.2025.138409","article-title":"Nanoconfined competitive\nadsorption and wettability transition","volume":"700","author":"Chu","year":"2025","journal-title":"J. Colloid\nInterface Sci."},{"issue":"10","key":"2026100610470343000_cit14","doi-asserted-by":"publisher","first-page":"nwaf368","DOI":"10.1093\/nsr\/nwaf368","article-title":"Techno-economic viability of natural\nhydrogen","volume":"12","author":"Zhang","year":"2025","journal-title":"Natl. Sci. Rev."},{"key":"2026100610470343000_cit15","doi-asserted-by":"crossref","first-page":"317","DOI":"10.1306\/M73705C22","article-title":"Petroleum Systems of the Campos\nBasin, Brazil","volume-title":"Petroleum Systems of South Atlantic\nMargins","author":"Guardado","year":"2000"},{"issue":"1","key":"2026100610470343000_cit16","article-title":"Carbonate reservoir of the Macae Formation, Campos Basin, RJ, Brazil.\nPart I - contribution to the geochemistry of carbonates","volume":"5","author":"Formoso","year":"1991","journal-title":"Geochim. Bras."},{"issue":"3","key":"2026100610470343000_cit17","doi-asserted-by":"publisher","first-page":"351","DOI":"10.1590\/S0102-261X2000000300012","article-title":"Petroleum\nin the Brazilian\ncontinental margin: geology, exploration, results and perspectives","volume":"18","author":"Milani","year":"2000","journal-title":"Brazilian J. Geophys."},{"key":"2026100610470343000_cit18","doi-asserted-by":"publisher","DOI":"10.4043\/15220-MS","article-title":"Campos Basin:\nreservoir characterization and management-historical overview and\nfuture challenges","author":"Bruhn","year":"2003","journal-title":"Offshore Technology\nConference - OTC"},{"key":"2026100610470343000_cit19","article-title":"Bulletin of Oil and Natural Gas Production, External Circulation,\nNo. 101","author":"National Agency of Petroleum, Natural Gas, and Biofuels (ANP).","year":"2019"},{"key":"2026100610470343000_cit20","first-page":"511","article-title":"Campos Basin","volume":"15","author":"Winter","year":"2007","journal-title":"Petrobras Geosci. Bull."},{"key":"2026100610470343000_cit21","doi-asserted-by":"publisher","first-page":"5124","DOI":"10.1016\/j.egypro.2013.06.427","article-title":"CO2 Storage\nCapacity of Campos Basin\u2019s Oil Fields, Brazil","volume":"37","author":"Rockett","year":"2013","journal-title":"Energy Procedia"},{"issue":"2","key":"2026100610470343000_cit22","doi-asserted-by":"publisher","first-page":"243","DOI":"10.1590\/23174889201500020005","article-title":"Depositional,\ndiagenetic, and stratigraphic aspects of Macae Group carbonates (Albian):\nan example from an oilfield from Campos Basin","volume":"45","author":"Okubo","year":"2015","journal-title":"Brazilian J. Geol."},{"key":"2026100610470343000_cit23","first-page":"175","volume-title":"Linguado and Enchova Oilfield Reports","author":"Petrobras.","year":"2012"},{"key":"2026100610470343000_cit24","volume-title":"Interactive Petrophysics User\u0301s Manual","author":"Geoactive Ltd.","year":"2025"},{"key":"2026100610470343000_cit25","unstructured":"MATLAB.\n          . User\u2019s Manual, 2025. www.mathworks.com. Accessed\non December 15, 2025."},{"key":"2026100610470343000_cit26","article-title":"The use of logs\nin exploration problems","author":"Hingle","year":"1959","journal-title":"Proceedings of the\n29th Annual International Meeting of the Society of Exploration Geophysicists"},{"issue":"04","key":"2026100610470343000_cit27","article-title":"Pattern recognition\nas a means of formation evaluation","volume":"14","author":"Pickett","year":"1973","journal-title":"Log Analyst"},{"issue":"01","key":"2026100610470343000_cit28","doi-asserted-by":"publisher","first-page":"42","DOI":"10.2118\/65-01-07","article-title":"Correlating\nand averaging connate water saturation data","volume":"4","author":"Buckles","year":"1965","journal-title":"J. Can. Pet. Technol."},{"key":"2026100610470343000_cit29","article-title":"Using log derived values of\nwater saturation and porosity","author":"Morris","year":"1967","journal-title":"Transaction\nof SPWLA 8th Annual Logging Symposium"},{"key":"2026100610470343000_cit30","article-title":"Pattern recognition in a digital\nage: a gameboard approach to determining petrophysical parameters","volume-title":"AAPG Annual Convention and Exhibition","author":"Krygowski","year":"2012"},{"key":"2026100610470343000_cit31","doi-asserted-by":"publisher","first-page":"54","DOI":"10.2118\/942054-G","article-title":"The electrical\nresistivity logs as an aid in determining some reservoir characteristics","volume":"146","author":"Archie","year":"1942","journal-title":"Trans. AIME, SPE"},{"key":"2026100610470343000_cit32","first-page":"187","volume-title":"Log interpretation charts, Houston, Schlumberger\nWell Services","author":"Schlumberger.","year":"1996"},{"key":"2026100610470343000_cit33","first-page":"512","volume-title":"Physical properties of rocks: Fundamentals and principles\nof petrophysics","author":"Scho\u0308n","year":"2015","edition":"2nd Ed."},{"issue":"3","key":"2026100610470343000_cit34","first-page":"205","article-title":"An introduction\nto porosity","volume":"44","author":"Hook","year":"2003","journal-title":"Petrophysics"},{"issue":"1","key":"2026100610470343000_cit35","doi-asserted-by":"publisher","first-page":"17","DOI":"10.2118\/1303-G","article-title":"Profitable\napplication of well logs","volume":"12","author":"Kirby","year":"1960","journal-title":"J. Pet. Technol."},{"key":"2026100610470343000_cit36","doi-asserted-by":"publisher","DOI":"10.1190\/sbgf2017-159","article-title":"Determining the\nArchie Equation parameters for clean and clayey reservoirs of Campos\nBasin through an inverse approach","volume-title":"Annals\nof 15th International Congress of the Brazilian Geophysical Society\nand Expogef","author":"Boechat","year":"2017"},{"key":"2026100610470343000_cit37","unstructured":"Nacur, G.; Carrasquilla, A.\n          Analysis of water\nsaturation of Namorado sandstone using well log data.  VI Brazilian Geophysics Symposium, SBGf - Brazilian Geophysical\nSociety; Porto Alegre, 2014. ISSN 2175\u20134551, https:\/\/home.sbgf.org.br\/Pages\/resumos.php. Accessed on December 15, 2025."},{"key":"2026100610470343000_cit38","doi-asserted-by":"publisher","first-page":"486","DOI":"10.1016\/j.petrol.2018.11.045","article-title":"Implication of heterogeneities on\ncore porosity measurements","volume":"174","author":"Allshorn","year":"2019","journal-title":"J. Pet. Sci. Eng."},{"key":"2026100610470343000_cit39","first-page":"74","volume-title":"Analyze reservoir petrophysics","author":"Stevanato","year":"2011"},{"issue":"03","key":"2026100610470343000_cit40","first-page":"131173297","article-title":"The graphical\nrepresentation of bulk volume water on the Pickett cross-plot","volume":"27","author":"Greengold","year":"1986","journal-title":"Log Analyst"},{"key":"2026100610470343000_cit41","doi-asserted-by":"publisher","first-page":"105219","DOI":"10.1016\/j.jsames.2024.105219","article-title":"Characterizing the Namorado sandstone in southern Brazil through\nthe analysis of a multi-borehole database and utilizing a contemporary\nworkflow","volume":"150","author":"Carrasquilla","year":"2024","journal-title":"J. South Am. Earth Sci."},{"key":"2026100610470343000_cit42","doi-asserted-by":"publisher","first-page":"741","DOI":"10.1016\/0264-8172(95)93599-Y","article-title":"Carbonate cementation\npatterns and\ndiagenetic reservoir facies in the Campos Basin Cretaceous turbidites,\noffshore eastern Brazil","volume":"12","author":"Carvalho","year":"1995","journal-title":"Mar. Pet. Geol."},{"key":"2026100610470343000_cit43","doi-asserted-by":"publisher","first-page":"103455","DOI":"10.1016\/j.jsames.2021.103455","article-title":"Proportional integral\nderivative controller used to\nsimulate the mineral concentration and fluid saturations from geological\ndata and well logs in the Namorado Reservoir, Southeastern Brazil","volume":"111","author":"Carrasquilla","year":"2021","journal-title":"J. South Am. Earth Sci."},{"key":"2026100610470343000_cit44","doi-asserted-by":"publisher","DOI":"10.3997\/2214-4609.201600889","article-title":"Using\ngeophysical\nwell logs to estimate the porosity system of Albian Carbonates of\nCampos Basin on the NE coast of Rio de Janeiro","author":"Abreu","year":"2016","journal-title":"78th EAGE Conference & Exhibition 2016 Vienna, Austria"},{"issue":"4","key":"2026100610470343000_cit45","doi-asserted-by":"publisher","first-page":"3549","DOI":"10.1021\/acsomega.1c06044","article-title":"New correlation\nfor calculating water saturation based on permeability, porosity,\nand resistivity index in carbonate reservoirs","volume":"7","author":"Gomaa","year":"2022","journal-title":"ACS Omega"},{"key":"2026100610470343000_cit46","doi-asserted-by":"publisher","first-page":"253","DOI":"10.1306\/3D9343F4-16B1-11D7-8645000102C1865D","article-title":"Resistivity of brine-saturated\nsands in relation to pore geometry","volume":"36","author":"Winsauer","year":"1952","journal-title":"Am. Assoc.\nPet. Geol. Bull."},{"key":"2026100610470343000_cit47","doi-asserted-by":"publisher","DOI":"10.2118\/15714-MS","article-title":"Accurate estimation\nof water saturations in complex carbonate reservoirs","volume-title":"In the Middle East Oil Show, Bahrain, One Petro","author":"Amin","year":"1987"},{"issue":"6","key":"2026100610470343000_cit48","doi-asserted-by":"publisher","first-page":"880","DOI":"10.1088\/1742-2132\/13\/6\/880","article-title":"Water saturation\non Albian carbonates reservoirs -\nancient Brazilian oil fields","volume":"13","author":"Vincentelli","year":"2016","journal-title":"J. Geophys. Eng."},{"key":"2026100610470343000_cit49","first-page":"1","article-title":"Seismic and well\nlog characterization of Eocene Turbidites in Enchova Bonito oilfields\nCampos Basin (Offshore Brazil)","author":"Schmidt","year":"2015","journal-title":"Annals of\nthe 14th International Congress of the Brazilian Geophysical Society"},{"key":"2026100610470343000_cit50","first-page":"69","article-title":"Carbonate reservoir\nof the Macae\nFormation, Campos Basin, RJ, Brazil","volume":"5","author":"Robaina","year":"1991","journal-title":"Geochim.\nBras."}],"container-title":["ACS Omega"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pubs.acs.org\/doi\/pdf\/10.1021\/acsomega.6c01355","content-type":"application\/pdf","content-version":"vor","intended-application":"unspecified"},{"URL":"https:\/\/pubs.acs.org\/acsodf\/article-pdf\/11\/39\/58645\/68669670\/acsomega.6c01355.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/pubs.acs.org\/acsodf\/article-pdf\/11\/39\/58645\/68669670\/acsomega.6c01355.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T15:11:00Z","timestamp":1791299460000},"score":1,"resource":{"primary":{"URL":"https:\/\/pubs.acs.org\/acsodf\/article\/11\/39\/58645\/5439524\/Advantages-Utility-and-Efficiency-of-Geophysical"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,9,27]]},"references-count":50,"journal-issue":{"issue":"39","published-online":{"date-parts":[[2026,9,27]]},"published-print":{"date-parts":[[2026,10,6]]}},"URL":"https:\/\/doi.org\/10.1021\/acsomega.6c01355","relation":{},"ISSN":["2470-1343"],"issn-type":[{"value":"2470-1343","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,9,27]]}}}