大庆长垣油田井震结合断层解释技术及效果

Fault interpretation based on integration of well and seismic data in Changyuan Oilfield,Daqing

结合密井网开发区井断点数据准确、齐全,高密度地震资料品质高、断层反射特征清晰两方面的优势,综合测井、地震数据中的有用信息,阐述了井震结合断层解释技术。该技术包括断层三维识别技术、井震结合断层空间定位、断层假象密井网验证、区分小断层与岩性变化的地震响应特征、井震解释垂向断距对比等内容。通过在长垣油田多个区块的应用,落实了大断层的空间位置,对大断层下盘的断层假象的认识更清楚,小断层解释更准确,整体上提高了各类断层的解释精度。在井震结合断层精细解释的基础上,通过部署平行于断面的大斜度井挖掘断层附近的剩余油,取得了较好的效果。

In Changyuan Oilfield,Daqing,well breakpoint data in dense well pattern is accurate and complete,and high-quality and high-density seismic da-ta shows clear reflection characteristics of faults.With these favorable conditions,we propose in this paper a fault interpretation approach based on integration of well and seismic data.This approach includes:3D fault recognition,fault localization in space,fault illusion confirmation with dense well pattern,distinction between minor faults and lithologic change with seismic response,comparison of fault vertical throw,etc.The proposed approach is applied to several blocks of Changyuan Oilfield.Large fault spatial positions are accurately identified,fault illusions are clearly distinguished,and minor faults are clearly characterized.Based on the faults interpretation with the proposed approach,a directional well deployed by our proposition obtains very good results for remaining oil development.