{"id":"https://openalex.org/W7225611543","doi":"https://doi.org/10.21203/rs.3.rs-11414359/v1","title":"Integrated Petrophysical Workflow and Recovery Factor Index for Unconventional Resource Assessment of the Lower Napo Shale, Oriente Basin, Ecuador","display_name":"Integrated Petrophysical Workflow and Recovery Factor Index for Unconventional Resource Assessment of the Lower Napo Shale, Oriente Basin, Ecuador","publication_year":2026,"publication_date":"2026-11-09","ids":{"openalex":"https://openalex.org/W7225611543","doi":"https://doi.org/10.21203/rs.3.rs-11414359/v1"},"language":"en","primary_location":{"id":"doi:10.21203/rs.3.rs-11414359/v1","doi":"https://doi.org/10.21203/rs.3.rs-11414359/v1","is_oa":true,"landing_page_url":"https://doi.org/10.21203/rs.3.rs-11414359/v1","pdf_url":"https://www.researchsquare.com/article/rs-11414359/latest.pdf","source":{"id":"https://openalex.org/S4306525896","display_name":"Research Square","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Research Square","raw_type":"posted-content"},"volume":null,"type":"preprint","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://www.researchsquare.com/article/rs-11414359/latest.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5161307301","display_name":"Hector Santiago Moran Otoya","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I204205638","display_name":"Austral University","ror":"https://ror.org/04043k259","country_code":"AR","type":"education","lineage":["https://openalex.org/I204205638"]}],"countries":["AR"],"is_corresponding":false,"raw_author_name":"Hector Santiago Moran Otoya","raw_affiliation_strings":["Austral University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Austral University","institution_ids":["https://openalex.org/I204205638"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5161357760","display_name":"Luis Stinco","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I204205638","display_name":"Austral University","ror":"https://ror.org/04043k259","country_code":"AR","type":"education","lineage":["https://openalex.org/I204205638"]}],"countries":["AR"],"is_corresponding":false,"raw_author_name":"Luis Stinco","raw_affiliation_strings":["Austral University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Austral University","institution_ids":["https://openalex.org/I204205638"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I204205638"],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":true,"cited_by_count":0,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10399","display_name":"Hydrocarbon exploration and reservoir analysis","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1907","display_name":"Geology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10399","display_name":"Hydrocarbon exploration and reservoir analysis","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1907","display_name":"Geology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13193","display_name":"Geological Studies and Exploration","score":0.0,"subfield":{"id":"https://openalex.org/subfields/1907","display_name":"Geology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10271","display_name":"Seismic Imaging and Inversion Techniques","score":0.0,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/oriente-basin","display_name":"Oriente Basin","score":0.9399999976158142},{"id":"https://openalex.org/keywords/shale-oil","display_name":"shale oil","score":0.7300000190734863},{"id":"https://openalex.org/keywords/unconventional-hydrocarbons","display_name":"unconventional hydrocarbon resources","score":0.6940000057220459},{"id":"https://openalex.org/keywords/petrophysical-analysis","display_name":"petrophysical analysis","score":0.843999981880188},{"id":"https://openalex.org/keywords/original-oil-in-place","display_name":"original oil in place","score":0.777999997138977},{"id":"https://openalex.org/keywords/thermal-maturity","display_name":"thermal maturity","score":0.7229999899864197},{"id":"https://openalex.org/keywords/type-ii-kerogen","display_name":"type II kerogen","score":0.7889999747276306},{"id":"https://openalex.org/keywords/total-organic-carbon","display_name":"total organic carbon","score":0.699999988079071},{"id":"https://openalex.org/keywords/hydrocarbon-saturation","display_name":"hydrocarbon saturation","score":0.7059999704360962},{"id":"https://openalex.org/keywords/effective-porosity","display_name":"effective porosity","score":0.7139999866485596}],"concepts":[{"id":"https://openalex.org/C46293882","wikidata":"https://www.wikidata.org/wiki/Q2080707","display_name":"Petrophysics","level":3,"score":0.9135000109672546},{"id":"https://openalex.org/C153127940","wikidata":"https://www.wikidata.org/wiki/Q221378","display_name":"Oil shale","level":2,"score":0.8195000290870667},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.7160000205039978},{"id":"https://openalex.org/C2781101838","wikidata":"https://www.wikidata.org/wiki/Q5470036","display_name":"Formation evaluation","level":2,"score":0.57669997215271},{"id":"https://openalex.org/C78762247","wikidata":"https://www.wikidata.org/wiki/Q1273174","display_name":"Petroleum engineering","level":1,"score":0.5138999819755554},{"id":"https://openalex.org/C101433766","wikidata":"https://www.wikidata.org/wiki/Q3543263","display_name":"Maturity (psychological)","level":2,"score":0.4968999922275543},{"id":"https://openalex.org/C2776662147","wikidata":"https://www.wikidata.org/wiki/Q3241434","display_name":"Hydrocarbon exploration","level":3,"score":0.4661000072956085},{"id":"https://openalex.org/C126559015","wikidata":"https://www.wikidata.org/wiki/Q1988844","display_name":"Source rock","level":3,"score":0.42829999327659607},{"id":"https://openalex.org/C199289684","wikidata":"https://www.wikidata.org/wiki/Q83353","display_name":"Mineralogy","level":1,"score":0.42419999837875366},{"id":"https://openalex.org/C17409809","wikidata":"https://www.wikidata.org/wiki/Q161764","display_name":"Geochemistry","level":1,"score":0.4221999943256378},{"id":"https://openalex.org/C35817400","wikidata":"https://www.wikidata.org/wiki/Q2383566","display_name":"Well logging","level":2,"score":0.4025000035762787},{"id":"https://openalex.org/C2777207669","wikidata":"https://www.wikidata.org/wiki/Q43648","display_name":"Hydrocarbon","level":2,"score":0.36899998784065247},{"id":"https://openalex.org/C187930136","wikidata":"https://www.wikidata.org/wiki/Q4867503","display_name":"Basin modelling","level":4,"score":0.3677000105381012},{"id":"https://openalex.org/C24345647","wikidata":"https://www.wikidata.org/wiki/Q1147488","display_name":"Unconventional oil","level":3,"score":0.34049999713897705},{"id":"https://openalex.org/C16674752","wikidata":"https://www.wikidata.org/wiki/Q1370637","display_name":"Mining engineering","level":1,"score":0.33820000290870667},{"id":"https://openalex.org/C5900021","wikidata":"https://www.wikidata.org/wiki/Q163082","display_name":"Petrology","level":1,"score":0.3325999975204468},{"id":"https://openalex.org/C66606449","wikidata":"https://www.wikidata.org/wiki/Q1295956","display_name":"Effective porosity","level":3,"score":0.323199987411499},{"id":"https://openalex.org/C109007969","wikidata":"https://www.wikidata.org/wiki/Q749565","display_name":"Structural basin","level":2,"score":0.3215000033378601},{"id":"https://openalex.org/C14641988","wikidata":"https://www.wikidata.org/wiki/Q7315329","display_name":"Reservoir modeling","level":2,"score":0.3052999973297119},{"id":"https://openalex.org/C158787203","wikidata":"https://www.wikidata.org/wiki/Q900291","display_name":"Total organic carbon","level":2,"score":0.30149999260902405},{"id":"https://openalex.org/C2779196632","wikidata":"https://www.wikidata.org/wiki/Q938398","display_name":"Kerogen","level":4,"score":0.2948000133037567},{"id":"https://openalex.org/C78641617","wikidata":"https://www.wikidata.org/wiki/Q45734","display_name":"Tight oil","level":3,"score":0.2888000011444092},{"id":"https://openalex.org/C170152797","wikidata":"https://www.wikidata.org/wiki/Q2348608","display_name":"Environmental geology","level":4,"score":0.274399995803833},{"id":"https://openalex.org/C548895740","wikidata":"https://www.wikidata.org/wiki/Q22656","display_name":"Petroleum","level":2,"score":0.2743000090122223},{"id":"https://openalex.org/C59000536","wikidata":"https://www.wikidata.org/wiki/Q4748519","display_name":"Amplitude versus offset","level":3,"score":0.2728999853134155},{"id":"https://openalex.org/C9930424","wikidata":"https://www.wikidata.org/wiki/Q7426587","display_name":"Saturation (graph theory)","level":2,"score":0.2680000066757202},{"id":"https://openalex.org/C95950515","wikidata":"https://www.wikidata.org/wiki/Q3081242","display_name":"Shale oil","level":3,"score":0.2669000029563904},{"id":"https://openalex.org/C55358776","wikidata":"https://www.wikidata.org/wiki/Q7250848","display_name":"Prospectivity mapping","level":3,"score":0.26409998536109924},{"id":"https://openalex.org/C122792734","wikidata":"https://www.wikidata.org/wiki/Q6538759","display_name":"Lithology","level":2,"score":0.25540000200271606}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.21203/rs.3.rs-11414359/v1","doi":"https://doi.org/10.21203/rs.3.rs-11414359/v1","is_oa":true,"landing_page_url":"https://doi.org/10.21203/rs.3.rs-11414359/v1","pdf_url":"https://www.researchsquare.com/article/rs-11414359/latest.pdf","source":{"id":"https://openalex.org/S4306525896","display_name":"Research Square","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Research Square","raw_type":"posted-content"}],"best_oa_location":{"id":"doi:10.21203/rs.3.rs-11414359/v1","doi":"https://doi.org/10.21203/rs.3.rs-11414359/v1","is_oa":true,"landing_page_url":"https://doi.org/10.21203/rs.3.rs-11414359/v1","pdf_url":"https://www.researchsquare.com/article/rs-11414359/latest.pdf","source":{"id":"https://openalex.org/S4306525896","display_name":"Research Square","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Research Square","raw_type":"posted-content"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7225611543.pdf","grobid_xml":"https://content.openalex.org/works/W7225611543.grobid-xml"},"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2375827292","https://openalex.org/W2471095416","https://openalex.org/W2896827506","https://openalex.org/W2184506561","https://openalex.org/W2597044320","https://openalex.org/W7008366601","https://openalex.org/W7131750109","https://openalex.org/W919800510","https://openalex.org/W4293072468","https://openalex.org/W2614811690"],"abstract_inverted_index":{"Abstract":[0],"The":[1,87,258,386,434],"progressive":[2],"decline":[3],"of":[4,12,54,64,71,102,116,232,244,248,254,271,284,330,355,367,375,381,396,457],"conventional":[5,32],"hydrocarbon":[6,43,99,164,195,246],"reserves":[7],"and":[8,51,80,105,113,143,163,178,223,250,297,334,351,377,414,428,445],"the":[9,29,55,60,65,69,92,97,103,114,169,202,207,237,268,272,290,317,328,356,390,397,407,454],"increasing":[10],"importance":[11],"unconventional":[13,42,74,400,423,442],"resources":[14,308,380],"have":[15],"intensified":[16],"interest":[17],"in":[18,281,327,360,404,421],"shale":[19,77,160,252,303,458],"oil":[20,78,208,401],"assessment":[21,444],"worldwide.":[22],"Ecuador\u2019s":[23],"Oriente":[24,66],"Basin,":[25],"historically":[26],"recognized":[27],"as":[28],"country's":[30],"principal":[31,98],"oil-producing":[33],"province,":[34],"contains":[35],"several":[36],"organic-rich":[37],"intervals":[38],"with":[39,68,84,130,211,324],"potential":[40],"for":[41,417,450],"development.":[44],"This":[45],"study":[46,88],"presents":[47],"an":[48,277,371],"integrated":[49],"geological":[50,345],"petrophysical":[52,145,230,347],"evaluation":[53,231,460],"Lower":[56,170,391],"Napo":[57,171,392],"Shale":[58,172,393],"within":[59,206,267],"central":[61,203,269],"structural":[62],"domain":[63,204,270],"Basin":[67],"objective":[70],"identifying":[72],"prospective":[73,259,307],"fairways,":[75],"estimating":[76,418],"resources,":[79],"reducing":[81,451],"uncertainty":[82,322,452],"associated":[83,323],"recovery-factor":[85,325],"selection.":[86],"area":[89,260],"focuses":[90],"on":[91],"Sacha\u2013Shushufindi":[93],"corridor,":[94],"which":[95],"represents":[96,437],"generation":[100,209],"kitchen":[101],"basin":[104],"is":[106],"characterized":[107],"by":[108],"favorable":[109,194],"thermal":[110,138],"maturity":[111,139,198],"conditions":[112],"occurrence":[115],"Type":[117],"II":[118],"kerogen.":[119],"More":[120],"than":[121,185],"27":[122],"wells":[123,235],"were":[124,309],"evaluated":[125],"using":[126],"wireline":[127],"logs":[128],"processed":[129],"Interactive":[131],"Petrophysics":[132],"(IP)":[133],"software,":[134],"integrating":[135,344],"stratigraphic":[136],"interpretation,":[137],"analysis,":[140],"geochemical":[141],"analogs,":[142],"quantitative":[144],"characterization.":[146],"Geological":[147],"screening":[148],"included":[149],"gamma-ray":[150,174],"response,":[151],"resistivity,":[152],"total":[153],"organic":[154],"carbon":[155],"(TOC),":[156],"vitrinite":[157],"reflectance":[158],"(Ro),":[159],"thickness,":[161],"porosity,":[162],"saturation.":[165],"Results":[166],"indicate":[167,193,388],"that":[168,201,389],"exhibits":[173],"values":[175,183,189,213,225],"between":[176],"150":[177],"190":[179],"API,":[180],"suggesting":[181],"TOC":[182],"greater":[184],"2%,":[186],"while":[187],"resistivity":[188],"exceeding":[190,226],"15":[191],"ohm-m":[192],"retention.":[196],"Thermal":[197],"analysis":[199],"demonstrates":[200],"lies":[205],"window,":[210],"Ro":[212],"ranging":[214],"from":[215,236,301],"0.7%":[216],"to":[217,370,441],"1.0%,":[218],"burial":[219],"temperatures":[220],"near":[221],"128\u00b0C,":[222],"heat-flow":[224],"58":[227],"mW/m\u00b2.":[228],"Detailed":[229],"four":[233],"representative":[234,331,429],"Sacha":[238],"Field":[239],"yielded":[240,276],"average":[241],"effective":[242],"porosity":[243],"15.9%,":[245],"saturation":[247],"54.3%,":[249],"net":[251],"thickness":[253],"approximately":[255,264],"60":[256],"ft.":[257],"was":[261,342],"delineated":[262],"over":[263],"4,000":[265],"km\u00b2":[266],"basin.":[273],"Volumetric":[274],"calculations":[275],"estimated":[278,310,372],"Original":[279],"Oil":[280],"Place":[282],"(OOIP)":[283],"33.89":[285],"\u00d7":[286,313,383],"10\u2079":[287,314,384],"bbl.":[288,385],"Applying":[289],"Petroleum":[291],"Resources":[292],"Management":[293],"System":[294],"(PRMS)":[295],"methodology":[296,358,416],"recovery":[298,373,419],"factors":[299],"derived":[300],"analog":[302],"developments,":[304],"technically":[305,378],"recoverable":[306,379],"at":[311],"2.37":[312],"bbl":[315],"under":[316],"P50":[318],"scenario.":[319],"To":[320],"address":[321],"selection":[326],"absence":[329],"PVT":[332],"data":[333,431],"production":[335,426],"history,":[336],"a":[337,361,412,438,447],"Recovery":[338,362],"Factor":[339,363],"Index":[340,365],"(RFI)":[341],"developed":[343],"quality,":[346],"properties,":[348],"drilling":[349],"efficiency,":[350],"hydraulic-fracturing":[352],"effectiveness.":[353],"Application":[354],"proposed":[357,408],"resulted":[359],"Risk":[364],"(RFRI)":[366],"0.845,":[368],"corresponding":[369],"factor":[374],"8.45%":[376],"2.86":[382],"results":[387],"constitutes":[394],"one":[395],"most":[398],"promising":[399],"opportunities":[402],"identified":[403],"Ecuador.":[405],"Furthermore,":[406],"RFI":[409],"framework":[410],"provides":[411],"transparent":[413],"reproducible":[415],"efficiency":[420],"frontier":[422],"plays":[424],"where":[425],"history":[427],"fluid-property":[430],"are":[432],"unavailable.":[433],"approach":[435],"therefore":[436],"practical":[439],"contribution":[440],"resource":[443,459],"offers":[446],"complementary":[448],"tool":[449],"during":[453],"early":[455],"stages":[456]},"counts_by_year":[],"updated_date":"2026-11-11T12:16:26.678958","created_date":"2026-11-10T00:00:00"}