塔中Ⅰ号断裂带奥陶系良里塔格组礁滩储集体模式与预测

塔里木盆地奥陶系良里塔格组礁滩储集体位于塔里木盆地塔中Ⅰ号断裂带的东部。研究目的层良里塔格组,由下部泥灰岩段、中部颗粒灰岩段和上部泥灰岩段组成。礁滩储集体主要发育在良里塔格组9个准层序中的PS7和PS8准层序组。从岩心观察入手,建立了良里塔格组礁滩体的地质模式,在此基础上,通过对已知礁滩体测井响应和地震反射特征分析并结合地震特征属性建立了地震识别模式。利用该模式预测研究区礁滩储集体有利分布区,预测结果为近年钻探的塔中821井等井所证实,获得高产油流,说明建立起来的地质—地球物理综合模式符合客观实际,能有效地指导勘探。

Geological-geophysical Model and Prediction Application of Upper Ordovician Lianglitage Reef-shoal Reservoir in Tazhong Area,Tarim Basin

A great progress of petroleum exploration has been made and commercial oil flows have been obtained in upper Ordovician Lianglitage reef-shoal reservoir along the eastern part of Fault Belt-Ⅰin Tazhong area recent years,which indicates that Lianglitage Formation is of a great commercial value of petroleum exploration. Lianglitage Formation consists of marl member in the lower,grain limestone member in the middle and marl member in the upper. Based on observation of well cores and field crops,a geological model of Lianglitage reef-shoal reservoir is built. A seismic recognition model is set up according to logging characteristics and seismic reflection of the reef-shoal. The result of prediction to favorable areas of reef-shoal reservoir with the model has proved by drillings in recent years. It is suggested that this geologic-geophysical model is fitted with the practice and can be used to guide petroleum exploration in this area.