Abstract
Abstract Based on the analysis of hydrocarbon generation, migration and accumulation, the controlling elements and pattern of reservoirs in the LB block of the Llanos Basin were summarized. The influencing factors for local hydrocarbon enrichment were identified, and favorable exploration targets were predicted. The LB block had a good potential for hydrocarbon migration and accumulation. In the major reservoir (the Carbonera Formation), multiple sets of reservoir-cap assemblages developed. Traps included faulted noses and faulted anticlines associated with normal faults. Structure and reservoir were the main controlling factors of hydrocarbon accumulation. Hydrocarbon migrated laterally along massive sandstones in the C7 section of the Carbonera Formation. Firstly, they accumulated in structural traps in the C7 section, and then partially migrated upwards into the C5 section through faults and accumulated in structural and lithologic traps adjacent to the faults at the bottom of C5. Local hydrocarbon enrichment was affected by various factors, such as tectonic background, trap amplitude and reservoir quality.Low-amplitude faulted anticline reservoirs developed far away from faults in the C7 section and lithologic updip pinch-out reservoirs in the downthrown side of faults in the C5 section were predicted.
Highlights
Based on the analysis of hydrocarbon generation, migration and accumulation, the controlling ele⁃ ments and pattern of reservoirs in the LB block of the Llanos Basin were summarized
This article is published with open access by Petroleum Geology & Experiment
Summary
Based on the analysis of hydrocarbon generation, migration and accumulation, the controlling ele⁃ ments and pattern of reservoirs in the LB block of the Llanos Basin were summarized. This article is published with open access by Petroleum Geology & Experiment. 图 1 亚诺斯盆地 LB 区块位置 Fig.1 Location of LB block in Llanos Basin 度一般大于 500 ft,分布稳定,盆地已发现的油气 藏均在该套地层之下。 卡沃内拉组内 C6 段、C4 段 及 C2 段泥岩对其下方的 C7 段、C5 段及 C3 段砂 岩储层也起到了很好的封盖作用,是良好的局部盖 层(图 2)。
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.