扶余油田中探25区块单砂体精细刻画及隔夹层识别

以松辽盆地扶余油田中探25区块泉头组四段为例,通过对单砂体进行成因分析和层次划分,结合复合河道单砂体叠加模式,开展复合河道平面单砂体识别,并进行单砂体分布及连通关系研究。结果表明,全区单砂体垂向叠置样式主要包括孤立式和切叠式,单砂体空间接触样式包括多层式、多边式、单边式、叠加式、对接式、孤立式六种。层间隔层划分标准为自然伽马大于84.5 API,微电极幅度差值小于0.2Ω·m;层内夹层划分标准为自然伽马回返程度大于16%,深侧向回返程度大于17%。

Fine characterization of single sand body and identification of isolated interlayer in Zhongtan 25 block of Fuyu oilfield

By taking the 4 th member of Quantou formation in Zhongtan 25 block of Fuyu oilfield, Songliao basin as an example, through genetic analysis and stratification of single sand body, combined with the superposition mode of single sand body of composite channel, single sand body identification of composite channel plane was carried out, and the distribution and connectivity of single sand body were studied. The results show that the vertical superposition styles of single sand body in the whole region mainly include isolated style and cut superposition style. The spatial contact styles of single sand body include multi-layer, multilateral, unilateral,superposition, butt joint and isolated styles. Interval layer division standard for natural gamma ray is greater than 84.5 API, the microelectrode separation value is less than 0.2 Ω·m. The classification standard for the layer within the interlayers is that the degree of natural gamma ray return is greater than 16% and that of deep lateral return is greater than 17%.