海拉尔盆地含火山岩地层复杂岩性剖面构建技术  

The complex lithological profile constructing technology of volcanic rock bearing strata in Hailaer Basin

作　　者：张美玲[1] 吴佳忆[1] 蒙启安[2] 刘国振[1] 杨晓玲[2] 姜永旭[2] 

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《地质科学》2011年第4期1166-1177,共12页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：中石油创新基金项目(编号:2009D-5006-01-05)资助

摘　　要：海拉尔盆地是中新生代断陷盆地,盆地内断裂发育、物源多且近、地层相带变化快、纵向多层位。这些地质特征导致海拉尔盆地岩性剖面结构复杂,不仅存在着火山熔岩和一般陆源沉积岩,且广泛发育火山过渡岩性。在岩石岩性多样纷杂、录井取心标定资料有限的前提下,如何构建合理的复杂岩性剖面已成为该盆地储层评价的关键。尽管常规测井资料在一定程度上可反映出岩层岩石颗粒成分及分布状况,同时又可提供岩层纵向上的连续变化趋势,但若给出高精度的纵向岩层岩性剖面,仍存在两项关键问题:1)各测井项目对复杂岩性的反映能力问题,2)沉积厚度薄、成分复杂的过渡岩性的识别问题。本文将岩层地质沉积信息作为测井资料识别岩性的约束条件,系统建立岩性剖面的有约束连续模式识别技术,实现了海拉尔盆地复杂岩性剖面的高精度构建。经过取心井的验证,综合岩性判别符合率达到80%以上。Hailaer Basin is a Mesocenozoic downfaulted basin,which developed faults,contained plenty of provenance nearby,had stratigraphic facies belts varying quickly and included multilayer seeing in longitudinal way.Those geologic characteristics caused the structure of lithological profile in Hailaer Basin complicated,leaded the result that not only volcanic lava and general terrigenous sediments existed,but volcanic transitional series developed widely in the basin.On the basic of various lithologic characters of native rocks and limited calibrating material of logging cores,the key to evaluate the reservoirs in this basin is how to set appropriate complex lithological profiles.Although conventional log data can reflect the component and distribution condition of rock particles in layers and provide formation continuous longitudinal varying tendency simultaneously to a certain degree,there still obtains two key problems if we want to provide highprecision longitudinal lithological profiles——The problem of capability of every logging item to reflect complex lithology,and the problem of identification of transitional lithology that shows thin sedimentary thickness and complicated components.In this passage,we see formation geologic sedimentary information as the constraint condition of lithology identification by using logging data,establish binding continuous model recognition technology of lithological profiles systematically,so as to achieve the highprecision setting of complex lithological profiles in Hailaer Basin.According to the certification of core wells,the coincidence rate of composite lithological discrimination reaches up to 80%.

关 键 词：构建技术 含火山岩地层 岩性剖面 海拉尔盆地 

分 类 号：P618.13[天文地球—矿床学]