Distribution of Remaining Oil Controlled by Architecture of Sand Body in Meandering Channel

Rong Qiang Hu; Di Ma; Shi Zhong Ma

doi:10.4028/www.scientific.net/AMR.827.191

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 827Distribution of Remaining Oil Controlled by...

Distribution of Remaining Oil Controlled by Architecture of Sand Body in Meandering Channel

Abstract:

To study the distribution of remaining oil inside meandering channel sand body, the size of sand body architecture was calculated by the use of sedimentary facies, dense well, river parameters, cores, well logs and other data. The architecture of meandering channel that was crescent-shaped in plane and diagonal type in section was identifiable. On the base of study of architecture, the shielding of interlayer was classified into four types by the observation of oiliness interlayer. Framework of seepage flow was identified in meandering channel sand body. Several lateral accretion bodies between the completely choked interlayer constituted the flow unit. Combined with core analysis, the remaining oil in meandering channel sand body distributed in the upper and the middle of flow unit which did not connect with production well. The oil displacement efficiency in the flow unit was a positive rhythm in the flow unit. The oil displacement efficiency was a high-contrast positive rhythm in the lateral accretion body shielded by completely choked interlayer. That was a low-contrast positive rhythm in the lateral accretion body shielded by partly choked or restricted interlayer. All of these would provide guidance for developing the remaining oil.