松辽盆地大庆长垣背斜带喇萨杏地区PI组地层发育模式研究  

Stratigraphic developmental models in PI formation of Lasaxing area in Daqing placanticline anticline zone,Songliao Basin

作　　者：王加强[1] 

机构地区：[1]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：《世界地质》2013年第2期325-330,共6页World Geology

基　　金：国家科技重大专项课题"单砂体及其内部构型表征技术"(2008ZX05010-001)

摘　　要：应用高分辨率层序地层学与沉积学相关理论,综合运用岩芯、测井资料,建立喇萨杏地区PI组薄层叠覆、前积及削蚀减薄地层发育模式。其中,PI1、PI21小层为薄层叠覆模式,PI4小层为前积模式,PI3与PI4之间为消蚀减薄模式。薄层叠覆模式显示近源沉积厚度薄,单元叠置紧密,可分性差;向远源方向沉积厚度增大,旋回发育完整,单元易于划分。消蚀减薄模式显示近源早期沉积遭受强烈侵蚀,向远源方向侵蚀程度减弱、消失。前积作用显示向深湖方向沉积厚度增大,层数增多。3种模式显示的共同作用,造成了北部近源至南部远源地层厚度增加、层数增多。地层发育模式的确立,对明确各开发区块的小层对应关系、小层间的接触关系及平面分布特征,建立地层对比方案和进行沉积演化规律研究具有指导意义。Using high-resolution sequence stratigraphy and sedimentology theory,three stratigraphic developmental models（the thin layer superimposition,progradation and erosional thinning） are established in Lasaxing area according to core and logging data.The beds of PI1 and PI21 show the thin layer superimposition model.PI4 shows progradation model,and the interlayer between PI3 and PI4 shows erosional thinning model.The thin layer superimposition model shows the nearly deposition thin,close unit and poor divisibility.The distant deposition developed thick layers,complete cycles and good divisibility.The erosional thinning model shows the nearly deposition erosion intensively,but erosion degree weakened or disappeared with the distance growing.The deep lake sediment thickness and number of layers increased by the progradation model.The interaction of the three models in the strata thickness and the amount of layer increases from north to south.The establishment of the stratigraphic models is significant for better understanding the layer＇s corresponding of each developmental block and layer features plane distribution,and for the study of stratigraphic correlation and sedimentary evolution.

关 键 词：松辽盆地 喇萨杏地区 PI组 地层发育模式 

分 类 号：P539.2[天文地球—古生物学与地层学] P539.6[天文地球—地质学]