Hydrocarbon carrier systems and prediction of the favourable areas in the Huainan foreland thrust zone
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摘要: 准南前陆冲断带油气资源丰富,但油气探明率较低,原因在于油气输导体系不清。通过对储集层、断裂和不整合面等构成油气输导体系的单一因素的发育特点的分析,阐明了每一种因素对油气输导过程的影响。准南前陆冲断带发育一套冲积扇-辫状河-辫状河三角洲-浅湖的沉积体系。储层具有较强的非均质性,相对高孔渗的砂体是油气运移的主要通道;该区发育上、下两套断裂体系,它们的组合形式为油气垂向快速运移提供了良好的输导条件;不整合面的发育为油气大规模的侧向运移提供了输导空间。Abstract: The present paper focuses on the effects of single factors such as reservoirs, faults and unconformities which constitute the hydrocarbon carrier systems on the hydrocarbon carrier processes in the Huainan foreland thrust zone. In this thrust zone, there develop the sedimentary systems including the alluvial fan, braided stream, braided delta and shallow lake. The reservoir rocks are highly heterogeneous. The high-porosity and high-permeability sandstones are believed to be the main pathways for hydrocarbon migration. The fault systems and their patterns have offered good carrier conditions for the rapid vertical hydrocarbon migration. The development of the unconformities has provided good carrier spaces for the large-scale lateral hydrocarbon migration. The integrated examination of the carrier system development and hydrocarbon distribution may facilitate the prediction and delineation of the favourable exploration targets.
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Keywords:
- reservoir /
- fault /
- unconformity /
- carrier system /
- foreland thrust zone /
- Huainan
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