摘要
在综合分析钻井、测井、地震资料的基础上,建立了王集油田桃园组三段(以下称核三段)层序地层格架,对王集油田核三段的层序结构进行了深入的研究。分析表明王集油田核三段发育1个三级层序,进一步划分出低位体系域(LST)、湖扩体系域(TST)、高位体系域(HST)和8个准层序组。在层序地层格架内,运用骨干剖面井-震联合精细对比的方法对研究区核三段沉积演化特征进行了研究,在分析研究区核三段层序结构空间演化规律的基础上,提出了王集油田核三段进积-退积-进积的沉积演化模式,即低位体系域时期,辫状河三角洲进积,导致沉积作用在研究区中北部形成古地貌隆起;湖扩体系域时期,辫状河三角洲退积,地层向古地貌隆起之上超覆减薄,部分砂体尖灭;高位体系域时期,辫状河三角洲再次进积,导致湖扩期趋于平缓的古地貌微隆起,沉积中心东移。研究区核三段沉积演化模式揭示了湖扩体系域时期研究区中北部存在的上倾尖灭岩性圈闭的发育机理,为该区下一步寻找上倾尖灭岩性圈闭奠定了理论基础并指明了勘探方向。
Research on sedimentary evolution is significance on guiding for reservoir prediction and subtle traps exploration. On the basis of a comprehensive analysis of drilling, logging and 3D-seismic data, the stratigraphic sequence framework of Member 3, Hetaoyuan Formation （He-3 Formation） in Wangii Oil- field was established and analysed. A 3-order sequences is identified within the target layers, and further be classified as lowstand systems tract （LST）, transgressive systems tract （TST）, highstand systems tract （HST） and 8 parasequence groups. Fine contrast on combined well sections-seismic profiles was used to study and propose model of the sedimentary evolution of He-3 Formation in Wangji Oilfield, which is delta progradation in LST, delta retrogradation in TST and delta progradation in HST. This model re- vealed the mechanism of updip pinchout lithologic trap development in north-central of the study area, and specified exploration direction of finding lithologic traps in the next step.
出处
《地质科技情报》
CAS
CSCD
北大核心
2014年第1期114-120,共7页
Geological Science and Technology Information
基金
国家自然科学基金项目(41102069)
关键词
王集油田
核三段
层序地层
沉积演化
岩性圈闭
Wangji Oilfield
He-3 Formation
sequence stratigraphy
sedimentary evolution
lithologic trap
