一个隐蔽油气藏的发现

Discovery of a hidden hydrocarbon reservoir

胜利油田物探公司研究所, 东营257100

Research Institute of Geophysical Prospecting Company of shengli Oilfield, Dongying City, Internal Postcode 257100

CD断裂带是济阳坳陷勘探历史长、油气突破小的地区。1992年解释此区三维地震资料时, 发现CD断层下降盘一侧存在许多异常地震信息, 如高振幅、高频率、高速度及独特的微地震相特征等。通过对这些异常信息的分析, 找们圈出了相应异常体的分布范围和空间形态, 并对其成因和储层物性作了推断, 预测出这些异常作与油气储集相关, 为此, 设计了两口验证井。实钻证明, 预测结果完全正确, 异常体为一个大型隐蔽油气藏, 取得了可喜的地质成果。

The CD fractured zone of Jiyang Sag is one of the areas where few-breakthroughs in oil/gas prospectiong have been made though a long period seismic survey was conducted there. When interpreting the 3-D seismic data in 1992,we found a lot of seismic anomalies in the down-thrown side of the fault such as high amplitude, high frequency, high velocity,special characteristic of micro seismic facies and so on. After analyring the anomalous information, we have defined the distribution and spattal outline of the relevant anomalous body, deduced its geneses and rock physics and then affrmed that this body is related to a hydrocarbon reservoir. Thc deduction was confirmed with two wclls specifiCally drilled for vcrification. As an encouraging geologie result, a large hidden reservoir has been consequently discovered.