基于地震属性的储层预测方法研究——以彰武断陷九佛堂组3+4砂组为例

Reservoir Prediction Method Based on Seismic Attribute——By Taking 3+4 Sand in Jiufotang Formation of Zhangwu Depression for Example

应用地震属性进行岩性预测和油气预测是中低勘探程度探区油气勘探的重要技术和手段,其关键是在对沉积环境和沉积序列发育规律认识的基础上,通过井震结合对地震相特征进行标定,进而通过多种地震属性分析,对不同类型的沉积相带分布进行划分。应用地震相聚类分析属性将彰武断陷九佛堂组3+4砂组划分出浅湖、半深湖和扇三角洲3种沉积相分布,并在盆地东部划分出火山岩发育带。在此基础上通过振幅属性和弧长属性相结合,在沉积相分布的基础上进一步划分出扇三角洲前缘砂体发育部位,并认为东部陡坡附近储层发育区可以作为下一步勘探的重点地区。

Application of seismic attribute technology in lithologic prediction and oil and gas forecasting was an important technology and means for oil and gas exploration in the areas with low-to-moderate degree of exploration.The key was based on the understanding of the developmental rule of depositional environment and sedimentary sequence , and different types of precipitation facies belts were identified by calibration seismic facies characteristics and analyzing multiple seismic attributes in combination with logging and seism.The seismic facies clustering analytic attribute was used to divide 3+4sand group in Jiufotang Formation of Zhangwu Depression into three kinds of sedimentary facies distributions as meare , half deep lake and fan delta.A volcanic rock developmental belt was identified in the east of the basin and development area of fan delta frontal sand on the basis of the distribution of sedimentary facies by combination of amplitude arc length and attribute.It is considered that development area in east steep region can be used as the key area of next exploration.