{"id":"https://openalex.org/A5111983257","orcid":"https://orcid.org/0009-0007-9579-7946","observed_orcids":["https://orcid.org/0009-0007-9579-7946"],"display_name":"Nnanna Okoli","raw_author_names":["N. Okoli","Nnanna O. Okoli","Nnanna Okoli","Nnanna Onwuegbueha Okoli","Okoli Nnanna"],"full_name":"Nnanna Onwuegbueha Okoli","works_count":16,"cited_by_count":108,"summary_stats":{"2yr_mean_citedness":2.2857142857142856,"h_index":6,"i10_index":4},"ids":{"openalex":"https://openalex.org/A5111983257","orcid":"https://orcid.org/0009-0007-9579-7946","observed_orcids":["https://orcid.org/0009-0007-9579-7946"]},"affiliations":[{"institution":{"id":"https://openalex.org/I16443873","ror":"https://ror.org/05xzf9508","display_name":"Federal University of Technology Owerri","country_code":"NG","type":"education","lineage":["https://openalex.org/I16443873"]},"years":[2026,2024,2022,2021,2020,2019,2017]},{"institution":{"id":"https://openalex.org/I180664298","ror":"https://ror.org/01pvx8v81","display_name":"Federal University of Technology","country_code":"NG","type":"education","lineage":["https://openalex.org/I180664298"]},"years":[2025]}],"last_known_institutions":[{"id":"https://openalex.org/I16443873","ror":"https://ror.org/05xzf9508","display_name":"Federal University of Technology Owerri","country_code":"NG","type":"education","lineage":["https://openalex.org/I16443873"]}],"topics":[{"id":"https://openalex.org/T10892","display_name":"Drilling and Well Engineering","count":13,"subfield":{"id":"https://openalex.org/subfields/2103","display_name":"Fuel Technology"},"field":{"id":"https://openalex.org/fields/21","display_name":"Energy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11379","display_name":"Rheology and Fluid Dynamics Studies","count":7,"subfield":{"id":"https://openalex.org/subfields/1507","display_name":"Fluid Flow and Transfer Processes"},"field":{"id":"https://openalex.org/fields/15","display_name":"Chemical Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11557","display_name":"Lubricants and Their Additives","count":6,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10399","display_name":"Hydrocarbon exploration and reservoir analysis","count":5,"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/T10721","display_name":"Surfactants and Colloidal Systems","count":3,"subfield":{"id":"https://openalex.org/subfields/1606","display_name":"Physical and Theoretical Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T10892","display_name":"Drilling and Well Engineering","value":6.95e-05,"subfield":{"id":"https://openalex.org/subfields/2103","display_name":"Fuel Technology"},"field":{"id":"https://openalex.org/fields/21","display_name":"Energy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11557","display_name":"Lubricants and Their Additives","value":3.57e-05,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11379","display_name":"Rheology and Fluid Dynamics Studies","value":2.44e-05,"subfield":{"id":"https://openalex.org/subfields/1507","display_name":"Fluid Flow and Transfer Processes"},"field":{"id":"https://openalex.org/fields/15","display_name":"Chemical Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13596","display_name":"Grouting, Rheology, and Soil Mechanics","value":1.55e-05,"subfield":{"id":"https://openalex.org/subfields/2205","display_name":"Civil and Structural Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10399","display_name":"Hydrocarbon exploration and reservoir analysis","value":1.19e-05,"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"}}],"x_concepts":[{"id":"152068911","wikidata":"https://www.wikidata.org/wiki/Q890914","display_name":"Drilling fluid","score":0.9152255058288574},{"id":"25197100","wikidata":"https://www.wikidata.org/wiki/Q890886","display_name":"Drilling","score":0.9027594327926636},{"id":"200990466","wikidata":"https://www.wikidata.org/wiki/Q271707","display_name":"Rheology","score":0.839826762676239},{"id":"192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","score":0.695453405380249},{"id":"127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","score":0.5748558640480042}],"counts_by_year":[{"year":2017,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2019,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2020,"works_count":2,"oa_works_count":2,"cited_by_count":8},{"year":2021,"works_count":1,"oa_works_count":0,"cited_by_count":9},{"year":2022,"works_count":2,"oa_works_count":2,"cited_by_count":12},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":21},{"year":2024,"works_count":3,"oa_works_count":1,"cited_by_count":15},{"year":2025,"works_count":2,"oa_works_count":1,"cited_by_count":27},{"year":2026,"works_count":2,"oa_works_count":0,"cited_by_count":16}],"display_name_alternatives":["N. Okoli","Nnanna O. Okoli","Nnanna Okoli","Nnanna Onwuegbueha Okoli","Okoli Nnanna"],"block_key":"n okoli","works_api_url":"https://api.openalex.org/works?filter=author.id:A5111983257","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5111983257","updated_date":"2026-11-14T11:48:19","created_date":"2017-05-12T00:00:00"}