A油田白垩系碳酸盐岩裂缝型储层综合预测技术研究  

Multi-disciplinary integration prediction of fractured carbonate reservoir in A Oilfield,Zagros Basin

作　　者：张涛[1] 佘刚 李苗 艾合买提江 叶双江 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院,北京100083

出　　处：《石油物探》2015年第6期770-779,共10页Geophysical Prospecting For Petroleum

基　　金：国家科技重大专项项目(2011ZX05031-002)资助

摘　　要：扎格罗斯盆地A油田白垩系裂缝-孔隙型碳酸盐岩油藏厚度大于500m,裂缝分布复杂,孔隙受成岩控制,有效储层预测难度大。针对上述难点,研究提出采用地质、测井、地震、油藏工程等多种信息对裂缝型碳酸盐岩储层进行综合预测的思路。首先利用岩心的铸体薄片及实测孔、渗资料从微观上识别出裂缝的发育特征及其控制因素和发育模式,利用常规和成像测井定量解释储层的岩性、物性以及裂缝的产状,为地震预测提供地质和岩石物理模型;然后优选出预测裂缝的敏感叠后地震属性(曲率属性、对称性),利用纵波方位各向异性裂缝识别技术对储层裂缝进行预测;最后借助与地震纵向分辨率相当的试井解释成果、试油提供的流量和生产指数等动态资料,对各属性及多属性融合技术的预测结果进行了验证。研究结果表明:1最大曲率和照明3D(Illuminator 3D,I3D)属性在大尺度断裂及裂缝发育带识别方面具有优势;2纵波方位各向异性(AVAZ)裂缝检测方法能够提供关于裂缝密度及分布范围方面较为详实的信息;3地震多属性融合技术可综合各属性的优点,实现从小尺度裂缝到大尺度裂缝带的预测,刻画白垩系碳酸盐岩裂缝型储层的分布。A Oilfield located in Zagros Basin is porous-fractured reservoirs with oil column of more than 500 m. Complex frac- ture distribution and diagenesis result in the difficulty in effective reservoir prediction. In order to solve the problem,an inte- grated study of geological,well logging, seismic attributes and reservoir engineering information on predicting the naturally fractured carbonate reservoir was carried out. The development characteristics of fractures and their controlling factors ~ de- velopment pattern can be identified from the core,casting thin sections, the measured porosity and permeability data in micro- scopicially. Meanwhile, the conventional and imaging log are applied to quantitativelY interpret the lithology, physical proper- ties and the orientation of fractures to provide geologic and petrophysical model for seismic prediction. According to the re- sults of geological and petrophysical interpretation, seismic attributes sensitive to fractures are selected and verified by results of imaging log interpretation, pressure build-up well test interpretation and oil production rates. Traditional 3D post-stack at- tribute show an advantage of predicting the faults and large-scale fractured belts, such as maximum curvature and illuminator 3D attribute. P-wave azimuthal anisotropy （AVAZ） method can provide more details about the intensity and distribution of the fractured reservoir. Multiple seismic attributes fusion techniques can be used to integrate the advantages of various attrib- utes and reduce the uncertainty of results. Multi-disciplinary research result shows that fractured reservoir can be accurately predicted and evaluated by different scale.

关 键 词：碳酸盐岩 裂缝型储层 多学科综合预测 属性融合 扎格罗斯盆地 

分 类 号：P631[天文地球—地质矿产勘探]