Resumen

MORA HERNANDEZ, CÉSAR AUGUSTO et al. Production and geochemical characterization of gas in the Lower Magdalena basin (Colombia). Implications for natural gas and liquefied petroleum gas prospectivity. Ing. Desarro. [online]. 2025, vol.43, n.2, pp.277-299.  Epub 01-Jul-2025. ISSN 0122-3461.  https://doi.org/10.14482/inde.43.02.986.861.

In the Lower Magdalena Valley (VIM) basin, 1201 MBPE have been discovered (OOIP & OGIP/ oil and gas). Gas resources discovered reach 3.57 TPC and include dry gas and wet gas. During 2021 the ANH (Agencia Nacional de Hidrocarburos) audited the production of 29 fields with a total production of 90908 MPC (99.91 GPCG), which accounts for 15 % of total production in the country. The main reservoirs in the basin correspond to sandy facies of the Lower Ciénaga de Oro Formation (late Oligocene) and calcareous facies of the Upper Ciénaga de Oro Formation (early Miocene). The gas produced varies between dry with more than 98% methane and humid where the proportion of LPG (C3+) is greater than 5%. Based on the geochemical characterization, wet gases are associated with primary kerogen cracking, and dry gases with secondary crude oil cracking. The presence in the basin of a wide spectrum of liquid and gaseous hydrocarbons represents an exploratory opportunity, since it is a basin where it is possible to find natural gas (NG/ C1) and wet gas (C3-C5), the main source of liquefied petroleum gas (LPG).

Palabras clave : cracking; dry gas; gas production; molecular and isotopic composition; wet gas.

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