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首页> 外文期刊>Fresenius environmental bulletin >PLANAR AND INTRA-LAYER HETEROGENEITY OF REMAINING OIL IN THE NEOGENE UNCONSOLIDATED SANDSTONE OF LIAHOE OILFIELD IN BOHAI BAY BASIN, CHINA
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PLANAR AND INTRA-LAYER HETEROGENEITY OF REMAINING OIL IN THE NEOGENE UNCONSOLIDATED SANDSTONE OF LIAHOE OILFIELD IN BOHAI BAY BASIN, CHINA

机译：渤海湾盆地辽河油田新近系非固结砂岩中剩余油的平面和层内非均质性

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摘要

The L-oilfield in the Huanghekou depression of the Bohai Bay Basin, China was seriously flooded and the remaining oil distribution was complicated. In order to improve the remaining oil recovery, in this paper, the core, logging and production dynamic data were used for the fine anatomy of the sand body A in the L oil field. We analyzed in detail the flooding characteristics of the A sand body and the control factors of remaining oil distribution. The results show that the reservoir of L oilfield is the Neogene fluvial facies unconsolidated sandstone, and the sand body A reservoir is a superposition of two periods of meandering rivers. The longitudinal rhythm is obvious, and the vertical permeability ratio can reach more than 5 times. The heterogeneity of the unconsolidated sandstone reservoirs in the planar and vertical direction leads to obvious planar contradictions and intra-layer contradictions. Planar heterogeneity is mainly affected by reservoir distribution, structure and edge water, and it is characterized by "low-part contiguous flooding and highposition residual oil enrichment". While intra-layer heterogeneity is mainly affected by rhythm and gravity, which is characterized by "the bottom of the oil layer is flooded to form secondary bottom water, and the remaining oil is concentrated in the upper middle part of the oil layer". This research can provide ideas for guiding the development of similar oilfields in the middle and late stages.
机译：中国渤海湾盆地黄河口depression陷的L油田被严重淹没，剩余的石油分布复杂。为了提高剩余油的采收率，本文采用岩心，测井和生产动态数据对L油田的砂体A进行精细解剖。我们详细分析了A砂体的驱替特征和剩余油分布的控制因素。结果表明，L油田油藏为新近纪河相未固结砂岩，砂体A油藏为两条蜿蜒河段的叠加。纵向节律明显，垂直渗透率可达到5倍以上。未固结砂岩储层在平面和垂直方向上的非均质性导致明显的平面矛盾和层内矛盾。平面非均质性主要受储层分布，构造和边缘水的影响，其特征是“下部连续驱和高位残留油富集”。层内非均质性主要受节奏和重力影响，其特征是“油层底部被淹没形成次级底水，而剩余的油则集中在油层的中上部”。这项研究可以为指导中晚期相似油田的开发提供思路。

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