“Six-map-and-one-table” characterization method of the Whole Petroleum System based on the element-evolution-distribution integrated concept:a case study of the Whole Petroleum System of Q ingshankou Formation in Q ijia-Gulong sag of Songliao Basin
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“Six-map-and-one-table” characterization method of the Whole Petroleum System based on the element-evolution-distribution integrated concept:a case study of the Whole Petroleum System of Q ingshankou Formation in Q ijia-Gulong sag of Songliao Basin
宋岩, 贾承造, 姜林, et al. “Six-map-and-one-table” characterization method of the Whole Petroleum System based on the element-evolution-distribution integrated concept:a case study of the Whole Petroleum System of Q ingshankou Formation in Q ijia-Gulong sag of Songliao Basin[J]. ACTA PETROLEI SINICA, 2025, 46(12): 2226-2244.
宋岩, 贾承造, 姜林, et al. “Six-map-and-one-table” characterization method of the Whole Petroleum System based on the element-evolution-distribution integrated concept:a case study of the Whole Petroleum System of Q ingshankou Formation in Q ijia-Gulong sag of Songliao Basin[J]. ACTA PETROLEI SINICA, 2025, 46(12): 2226-2244. DOI: 10.7623/syxb202512002.
“Six-map-and-one-table” characterization method of the Whole Petroleum System based on the element-evolution-distribution integrated concept:a case study of the Whole Petroleum System of Q ingshankou Formation in Q ijia-Gulong sag of Songliao Basin
Although the Whole Petroleum System theory has gained substantial attention
an effective evaluation and characterization framework is still lacking. Following the core concept of "element-evolution-distribution"
a research framework for the Whole Petroleum System was established. Taking the Whole Petroleum System of Qingshankou Formation in Qijia-Gulong sag of Songliao Basin as the study case
this paper systematically elucidates its evolutionary processes and distribution patterns
and develops a characterization system comprising six maps and one table
i.e.
comprehensive static element map
burial history map
hydrocarbon accumulation event map
hydrocarbon ordered distribution map for key strata
profile distribution map
planar distribution map
and hydrocarbon summary table. The main findings are as follows. (1)The "element-evolution-distribution" integrated research concept was systematically proposed. Taking the Qingshankou Formation in Qijia-Gulong sag as a representative case
a Whole Petroleum System research framework suitable for continental basins was established
which provides a paradigm for studying the Whole Petroleum System in comparable geological settings. (2)The dynamic evolutionary process of conventional and unconventional reservoirs in the Whole Petroleum System of Qingshankou Formation was clarified. It was identified that at the end of Nenjiang Formation deposition
the source rocks of Qingshankou Formation entered the peak hydrocarbon-expulsion stage while the reservoirs had not yet undergone compaction
allowing conventional oil to accumulate first. From the end of Nenjiang Formation deposition to the end of Mingshui Formation deposition
source-reservoir systems evolved synergistically. The reservoirs were progressively tightened and trapped high-maturity oils
thus forming tight oil reservoirs. The key retention period for shale oil was from Nenjiang Formation deposition stage to the Early Paleogene. (3)The spatial distribution of the Whole Petroleum System of Qingshankou Formation in Qijia-Gulong sag was described at two hierarchical levels
i.e.
the internal stratigraphic distribution and the overall system-wide distribution. In Qingshankou Formation
shale oil
tight oil
and conventional oil reservoirs develop successively from the basin center toward the margins
exhibiting an orderly spatial pattern. (4)The "six-map-and-one-table" characterization system was established for the first time
enabling a comprehensive depiction of the Whole Petroleum System across multiple dimensions
including geological element assemblages
geological evolutionary processes
temporal-spatial coupling of hydrocarbon accumulation
and spatial distribution characteristics. This study advances and refines the Whole Petroleum System theory and provides theoretical and technical support for hydrocarbon exploration in continental basins.