摘要
应用地震、测井、录井、岩心及分析测试资料，综合采用地层学、沉积学、层序地层学方法，详细研究了梨树断陷沉积演化规律，建立了层序地层学模式．梨树断陷地层主要由砾岩、砂砾岩、砂岩、粉砂岩、泥岩夹火山岩、煤层组成，划分为火石岭组和梨树组．依层序地层学观点，从下至上划分为４个超层序，１６个三级层序（ＳＱ１～ＳＱ１６）．沉积相类型有冲积扇相、河流相、湖泊相、扇三角洲相、三角洲相、湖底扇相和火山岩相．从沉积特征可划分为４个演化阶段，即扇三角洲－湖泊－火山岩充填期、扇三角洲－湖泊－河流三角洲充填期、河流三角洲－湖泊－扇三角洲充填期和河流三角洲－湖泊充填期，从而将本断陷沉积层序归纳为３种层序地层学模式，即断陷型、断坳并存型、坳陷型层序地层学模式．
Based on seismic, log, drilling and core data, the depositional evolution and sequence stratigrphic models have been discussed in detail by using methods of stratigraphy, sedimentology and sequence stratigrphy. The strata of Lishu Fault Basin mainly consists of a sets of conglomerate, sandstone with conglomerate, sandstone, slitstone, mudstone, etc., interbeded with volcanic rock thin seams. From the lowest to the uppermost, the set of strata was traditionally divided into two formations, Huoshiling and Lishu. From the viewpoint of sequence stratigraphy, this set of strata can be divided into 4 supersequences of 16 third order sequences. The sedimentary facies developed in the set of strata mainly include alluvial fans, rivers, lacustrine deposits, fan deltas, delta, lake floor fans and volcanic rocks. The filling processes of Lishu Fault Basin can be divided into 4 depositional evolution stages which are fan delta lacustrine volcanic rocks, fan delta lacustrine delta, delta lacustrine fan delta and delta lacustrine upward in order. The fault basin develops three sequence stratigrphic models which are fault basin, fault deprssion basin and depression basin.
出处
《大庆石油学院学报》
CAS
北大核心
1999年第1期5-7,共3页
Journal of Daqing Petroleum Institute
关键词
断陷盆地
沉积演化规律
层序地层学
模式
fault basin, sedimentary facies, depositional evolution sequence, stratigrphic models
