Accumulation Regularity of Clastic Rocks in Ludong Sag of Kailu Basin

doi:10.3969/j.issn.1006-6535.2022.05.009

Abstract

Abstract: In response to the problem of poor understanding of the accumulation law of clastic rock reservoirs in Ludong Sag of Kailu Basin, the accumulation of clastic rock was explored through the study of sedimentary evolution, reservoir characteristics and pore evolution on the basis of fine tectonic interpretation. The result shows: The uneven development of faulted basins makes most of the oil and gas accumulate in favorable facies zones adjacent to hydrocarbon-generating sags; the clastic rock reservoirs in Ludong Sag has an average pore radius of 4.57-9.56 μm and average throat radius of 3.02-8.33 μm, so it is poor in overall seepage ability, causing difficulties for oil and gas to migrate over long distances, and it is close-sourced and quasi-continuous. Based on the study of clastic sedimentation, reservoir formation and accumulation, the oil and gas accumulation model of Ludong Sag was established. The research results lay a certain theoretical foundation for the exploration of low-permeability oil and gas reservoirs in the Ludong Sag, and have important guiding significance for the oil and gas exploration of similar oil reservoirs.

Key words: evolution characteristics, clastic rocks, near-source accumulation, enrichment law, Ludong Sag, Kailu Basin

CLC Number:

TE121

Zhang Ruixue. Accumulation Regularity of Clastic Rocks in Ludong Sag of Kailu Basin[J]. Special Oil & Gas Reservoirs, 2022, 29(5): 66-71.

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