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为了厘清冀中坳陷饶阳凹陷蠡县斜坡西柳10井区油水倒置的现象,以蠡县斜坡西柳10断块高43井区的岩心描述与物性分析为基础,通过核磁共振等方法,结合单井、连井砂体的精细对比,建立了3种油水倒置的单井成因模式和2种砂体对比模式.用这些模式将西柳10断块高43井区沙三段顶部砂组重新进行分层对比.研究表明:西柳10井区储层孔隙度一般在10%～15%,渗透率为1.56～14.85×10-3μm3,属低孔低渗储层,且层内频繁发育的泥岩隔夹层增加了储层的非均质性.驱替动力弱、储层物性差和非均质性强是造成该区域出现油水倒置现象的主要因素.驱替动力弱导致油水置换不充分,储层物性差使得油气充注程度低,形成了低饱和度油藏,同时较发育的隔夹层使得油水关系更为复杂,直接引起低孔低渗油藏出现油水倒置.
In order to clarify the inversion of oil and water in the Xiluoli 10 well in the Jixian slope in the Raoyang depression of Jizhong depression, based on the core description and physical property analysis of the Xinyan 10 well block in Xiliu 10 of the Yixian Slope, nuclear magnetic resonance (NMR) Well and even well sand bodies, three oil-water inversion single-well genesis models and two sandstone correlation models were established, and these models were used to re-divide the sand group at the top of Sha-3 Member in Block 43 of Xiliu 10 The results show that the reservoir porosity in Xiliu 10 well is generally between 10% and 15% and the permeability is between 1.56 and 14.85 × 10-3μm3, which belongs to the low-porosity and low-permeability reservoirs and the frequently interbedded mudstone Increase reservoir heterogeneity, weak driving force, poor reservoir property and high heterogeneity, which are the main factors causing oil-water inversion in this area. The low level of oil and gas filling causes the formation of low-saturation reservoirs, and the more developed inter-mezzanine makes the relationship between oil and water more complicated, resulting in inversion of oil-water directly in low-porosity and low-permeability reservoirs.