松辽盆地白垩系测井—沉积相类型与特征

本文通过常规地质手段与测井解释相比较的研究方法。根据7个实测剖面和66口探井的沉积相研究成果,总结出松辽盆地内可被明显识别10种测井—沉积相类型:①大段齿化箱—菱形冲积扇相、⑦多阶梯状冲泛平源相、③中高幅齿化漏斗—钟形扇三角洲相、④连续进积或退积武三角洲相、⑤低幅背景或见中高幅指状峰的滨浅湖相、⑥低幅背景间夹中幅齿状峰的湖岸盐坪相、⑦大段低幅曲线偶见中幅齿—菱形峰的半深湖及深湖相、⑧中幅齿化箱—菱形水下沉积物重力流相、⑨低幅齿形沼泽相、⑩高幅似箱形火山(沉积)岩相。

CATEGORIES AND CHARACTERISTICS OF SONGLIAO BASIN CRETACEOUS LOGGING-SEDIMENTARY FACIES

Based on the study of 7 outcrops and 66 well logs, the authors summarize 10 types of logging -sedimentary facies recognizable in the Cretaceous of Songliao Basin . They are : 1) alluvial fan facies; 2) fluvial plain facies; 3) fandelta facies ; 4 ) delta facies ; 5) shoreshallow lacustrine facies ; 6) beach salty flat facies; 7) half deep to deep lacustrine facies; 8) underwater gravity flow deposit facies; 9) lacustrine bog bacies; and 10) pyroclastic facies.According to the study, the authors believe that in the application of logging -sedimentary facies , the following two factors should be always remembered :1) Logging results can reflect the underground geological information indirectly only , so that the interpretations of well logging must be based on the complete research of sedimentary geology .2) The shape of a well log is the final result affected by many factors , so that the question of apply ability in the interested area must be considered before using a published model of logging-sedimentary facies.