| Vanadium, nickel and porphyrins as tracers of secondary migration route of petroleum: Maracaibo Lake Basin, Venezuela</td>
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<td colspan="2" class="text5">关键词:
<a
href='http://oa.las.ac.cn/oainone/service/browseall/viewmore?ptype=JA&q= AND oakeywords:"Cuenca del Lago de Maracaibo"'>Cuenca del Lago de Maracaibo</a>;
<a
href='http://oa.las.ac.cn/oainone/service/browseall/viewmore?ptype=JA&q= AND oakeywords:"Alturitas"'>Alturitas</a>;
<a
href='http://oa.las.ac.cn/oainone/service/browseall/viewmore?ptype=JA&q= AND oakeywords:"migración secundaria"'>migración secundaria</a>;
<a
href='http://oa.las.ac.cn/oainone/service/browseall/viewmore?ptype=JA&q= AND oakeywords:"metales traza"'>metales traza</a>;
<a
href='http://oa.las.ac.cn/oainone/service/browseall/viewmore?ptype=JA&q= AND oakeywords:"porfirinas"'>porfirinas</a>;
<a
href='http://oa.las.ac.cn/oainone/service/browseall/viewmore?ptype=JA&q= AND oakeywords:"Maracaibo Basin"'>Maracaibo Basin</a>;
<a
href='http://oa.las.ac.cn/oainone/service/browseall/viewmore?ptype=JA&q= AND oakeywords:"Alturitas"'>Alturitas</a>;
<a
href='http://oa.las.ac.cn/oainone/service/browseall/viewmore?ptype=JA&q= AND oakeywords:"secondary migration"'>secondary migration</a>;
<a
href='http://oa.las.ac.cn/oainone/service/browseall/viewmore?ptype=JA&q= AND oakeywords:"trace metals"'>trace metals</a>;
<a
href='http://oa.las.ac.cn/oainone/service/browseall/viewmore?ptype=JA&q= AND oakeywords:"porphyrins"'>porphyrins</a>;
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<td class="text2" colspan="2" style="color: #2575A5;">DOI : </td>
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<td colspan="2" class="text5" style="color: #2575A5;">来源:<a
href='http://oa.las.ac.cn/oainone/service/browseall/viewmore?ptype=JA&q= AND oasourcestr:"DOAJ"'>
DOAJ</a></td>
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<div class="article">
<h6>【 摘 要 】</h6>
<p style="text-align: justify; text-indent: 2em;">
Vanadio, níquel y porfirinas como trazadores de rutas de migración secundaria del petróleo: Cuenca del lago de Maracaibo, Venezuela<br>A model of secondary migration for the Marcelina (Paleocene) reservoir of the Alturitas oil field located in the Maracaibo Basin is proposed. For this purpose, diverse trace metals and biomarker-derived parameters were used, for a suite of 30 crude oil samples analyzed by SARA, GC-MS, ICP-OES and UV-Visible techniques. Considering a unique geochemical type of crude oil in the reservoir [1-2], distributional changes along the reservoir area for selected parameters was studied. Ten trace metals were analyzed and splitted into two groups using multivariate statistic. The first group (Cd, Cu, Mo, Fe, P, Zn, Ca, Mg) does not display behaviors that can be associated to the secondary migration process but which rather they indicate a chalcophic association (Cd, Cu, Mo y Zn) or colloidal complexes with naphtenic acids (Ca, Mg, Fe). The behavior of the second groups, including total crude oil vanadium, nickel, porphyrins and resins plus asphaltenes concentrations, indicates that a natural chromatographic process has been affecting the crude oil composition, leading the proposition of a secondary migration route with a south-north oriented preferential migration axis. The analysis of different biomarkers did not throw clear results as far as the characterization of the process of migration and accumulation in the reservoir.</p>
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