«Proceedings of Gubkin University»

POTENTIAL OF SOURCE ROCKS, CHARACTERISTICS OF NATURAL GAS IN THE CENTRAL AND SOUTHERN PARTS OF THE CENOZOIC BASIN SONG HONG - VIETNAM

UDC: 553.98
DOI: 10.33285/2073-9028-2021-1(302)-5-18

Authors:

¹ Gubkin Russian State University of Oil and Gas (National Research University), Moscow, Russian Federation
² Vietnam Petroleum Institute, Hanoi, Vietnam

Keywords: Song Hong basin, oil and gas source rocks, organic matter, maturity

Annotation:

The article presents the potential of oil and gas source rocks, their maturity in the center and southern part of the Song Hong basin, as well as the characteristics of natural gas. More than 40 exploration wells were drilled within the Song Hong basin, 30 wells showed hydrocarbons (in the central and southern parts of the basin, mainly gases with a high content of carbon dioxide were discovered). Oligocene, Lower and Middle Miocene sediments are the main source rocks in the central and southern parts and contain mainly organic matter (OM) of continental origin (type III and type II-III). Most sedimentary rocks of the Oligocene and Lower Miocene are in the dry gas generation zone and in the over-maturity phase. Three groups of gases were detected in the study area, including: a group of mixed wet gas and dry gas/biochemical gas without CO2; the wet group has a low CO2 content; the wet group (mixed with a small amount of dry gas) has a high CO2 content.

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