Abstract
III oil formation of He3 section of block 1 in Jinglou Oilfield has entered the mid-late stage of oilfield development after years of steam huff and puff production. The distribution of remaining oil is scattered. This paper combines the data of core, well logging, seismic and development performance to analyze the reservoir heterogeneity. It reveals the impact on oilfield development. The area is mainly fine sandstone, siltstone and inequigranular sandstone, belonging to the river sediments, the development of fan delta and fan delta front subfacies. The heterogeneity of reservoirs and sedimentary microfacies are closely related, with moderate - strong. Well spacing near the larger region between the well and well pattern is not perfect in southern area and fault is the main purpose of tapping the potential of remaining oil in the next area.
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