Abstract: The Ordovician carbonate reservoirs of in the Tazhong area of Tarim Basin were characterized by deeply buried depth and strong heterogeneity.These reservoirs have the obvious reflection features and well-log curves.Based on these geophysical responses,many seismic techniques such as post-stack seismic attributes,seismic acoustic impedance inversion,lithology inversion from pre-stack seismic data,and hydrocarbon detection were applied for predicting the fractured and paleocave reservoirs of Lower Ordovician on the southeastern slope of Tazhong area.Five developed zones of paleokarst reservoirs and four favorable drilling targets were obtained from the integration analyses of seismic data and well data by using structure,rock physics and lithofacies information.An oil well in the favorable target zone was drilled,and the above prediction was proved.

Key words: Tarim Basin, Tazhong area, carbonate rock, paleokarst reservoir, seismic techniques, reservoir prediction, hydrocarbon detection

摘要： 塔里木盆地塔中地区奥陶系古岩溶储层具有埋藏深、非均质性强等特点,但其测井和地震响应较为明显。为此,利用地震、测井和地质资料及地震资料叠后波阻抗反演、属性分析和叠前双相介质储层物性参数反演技术,对该区东南部卡塔克区块下奥陶统古岩溶缝洞型储层进行了识别、预测和含油气检测分析。结果表明,卡塔克区块有5个古岩溶储层发育区带,并综合评价出4个有利钻探目标。优选其中一个目标进行钻探,证实了预测结果的可靠性。

关键词: 塔里木盆地, 塔中地区, 碳酸盐岩, 古岩溶储层, 地震技术, 储层预测, 含油气检测