塔河油田三叠系哈Ⅰ-1油层组储层预测研究

Study on Reservoir Prediction of the Triassic HaⅠ-1 Oil Formation in Tahe Oilfield

针对塔河油田三叠系哈Ⅰ-1油层组储层砂体厚度薄、横向变化快、地震资料分辨率低、储层无响应特征等特点,从沉积模式、河道流线和属性拟合分析的角度研究薄砂体储层的形态、边界及厚度预测问题。首先,利用区域沉积环境、岩心相、测井相和实验资料确定砂体成因,明确沉积微相及其模式;然后,通过切片对比和等高程对比进一步明确古河道流向,结合初期、末期河道流线包络法进一步明确储层边界;最后,通过多种属性拟合对储层厚度进行预测。

Aiming at the limiting factors such as the thin thickness of the sand reservoir,rapid lateral change,low resolution of seismic data,and no reservoir response characteristics of the Triassic Ha I-1 oil layer group in Tahe Oilfield,the morphology,boundary and thickness of thin sand reservoir are predicted by studying sedimentary mode,channel streamline and attribute fitting.Firstly,the genesis of sand bodies is determined through regional sedimentary environment,core facies,logging facies,and experimental data,and the sedimentary microfacies and their patterns are clarified.Then,the methods of slice comparison and equal elevation comparison are used to clarify the flow direction of ancient river channels,and the reservoir boundaries are determined by combining the initial and final channel streamline line envelope methods.Finally,reservoir thickness is predicted through multiple attribute fitting methods.