周清庄地区沙一下生物灰岩储集体研究与认识

Reservoir body study and cognition for lower Sha 1 biolithite of Zhouqingzhuang area

周清庄地区沙一下生物灰岩主要分布在港西断层下降盘,生物灰岩的平面展布及产能情况较为复杂,为了明确油气聚集、油井产能与沉积相带的关系,该文通过研究沉积能量大小与生物灰岩的分布关系,确定了水下隆起、浅水高能带、深水低能带及过渡带四个沉积相带,而浅水高能带沉积的生物灰岩储集层物性好,油井产能高,是有利的钻探区域。

Lower Sha 1 biolithite of Zhouqingzhuang area mainly distributes at the downthrow block of Gangxi fault, the plane spreading and productivity situation of biolithite were complex. In order to make clear the relationship between oil-gas accumulation, oil well productivity and sedimentary facies belts, the paper determined four sedimentary facies belts through studying relations between the sedimentary energy amount and the biolithite distribution, i.e. underwater uplift, shallow-water high-energy zone, deep-water low-energy zone and transition zone, but the biolithite reservoir, deposited at the shallow-water high-energy zone, had the good physical property, the productivity of oil wells from there was high, it was a favourable area for drilling.