松辽盆地白垩系营城组隐伏火山机构物理模型和地震识别

Physical model and seismic recognition of concealed volcanic edifices of Yingcheng Formation in Songliao Basin,Cretaceous,NE China

将火山机构分为火山口-近火山口相（CNCF）、近源相（PF）和远源相（DF）三个相带．露头揭示这三个相带的倾角范围为：CNCF-40～70°，PF25～45°，DF-20～35°．这三个相带的裂缝线密度为：CNCF-10～30条／m，PF-3～25条／m，DF-2～11条／m．这三个相带的相干值的关系为：CNCF〈PF〈DF．优选地层倾角和相干体两种方法识别松辽盆地营城组隐伏火山机构．在XS8井-XS4井区营城组火山岩旋回一中，两种方法均识别出14个火山机构、经钻井验证其准确率为100％．将火山机构预测成果应用于庆深气田勘探方案，使钻井成功率达到90％．

Volcanic edifice is divided into three facies belts which are crater - near crater facies （CNCF）, proximal facies （PF） and distal facies （DF）. The dip ranges of the three facies belts in outcrops are listed： CNCF 40～70°, PF -25～45°, DF-20～35°. The liner density of fracture of the three facies belts are listed： CNCF-10～30 fractures per meter, PF-3～25 fractures per meter, DF-2～11 fractures per meter. The coherent value relation of the three facies belts is CNCF〈PF〈DF. Both dip angle and coherence cube methods are selected to recognize the buried volcanic edifices in Songliao Basin. Fourteen volcanic edifices are recognized in both two methods in the first volcanic cycle of Yingcheng Formation and the prediction perfectly corresponds to the drilling results in well XS8-well XS4 area. Successful ratio of wells attains 90% when the prediction results are employed in the exploration of Qingshen gas field.