汤原断陷始新统新安村组与达连河组层序地层模式  

Sequence stratigraphic model of the Eocene Xin'ancun Formation and Dalianhe Formation in the Tangyuan fault depression

作　　者：苗巧银[1,2] 刘招君[3] 杜江峰 柳容 韩娇艳 潘明宝[1,2] 张平[1,2] 

机构地区：[1]国土资源部地裂缝地质灾害重点实验室,江苏南京210049 [2]江苏省地质调查研究院,江苏南京210018 [3]吉林大学地球科学学院,吉林长春130000 [4]中海油研究总院,北京100027 [5]东北石油局,吉林长春130000

出　　处：《地质学刊》2015年第4期577-583,共7页Journal of Geology

基　　金：大庆油田项目"汤原断陷新安村组-达连河组细分层沉积相研究"(DQYT-1201002-2006-JS-11720)

摘　　要：利用层序地层学原理,通过岩芯、测井曲线、地震剖面等对三级层序进行识别,获得4个三级层序:新安村组为SX1、SX2两个三级层序,达连河组为SD1、SD2两个三级层序。根据岩性组合特征、测井曲线形态和同相轴反射特征,对低水位体系域、水进体系域、高水位体系域和水退体系域等进行识别和划分,建立了该区层序地层格架和层序地层模式。研究了该模式与岩性油藏的分布关系。认为缓坡一侧潜水区为岩性成藏发育的有利部位,深水区在低水位和水退体系域易形成重力流或水下扇,为有利的岩性油藏;陡坡一侧发育扇三角洲前缘砂体,为较好的岩性成藏区块。以上根据层序地层研究,预测可能存在的有利区(岩性油藏)经勘探获得证实,所以层序地层模式对寻找隐蔽油气藏起到了较好的预测和类比作用。On the principle of sequence stratigraphy, this study identified four third-order sequences through the core, logging and seismic profiles in the Tangynan fault depression i.e., SX1 and SX2 for the Xin＇ancun Formation, and SD1 and SD2 for the Dalianhe Formation. According to lithological combination characteristics, shape of the logging curves and event reflection features, the study i- dentified the lowstand tract system, trangressive tract system, highstand tract system and regressive tract system, and established the sequence stratigraphic framework and model of the studied area. The relationship between this new-established model and lithologieal reservoirs indicates that： （ 1 ） the diving areas on the gentle slope side are favorable for lithological reservoirs, and the deepwater areas of the lowstand tract system and regressive tract system tend to form gravity flow or underwater fan, which are favorable for lithological reservoirs; and （2） the well-developed fan delta front sandbody on the steep slope side is conducive to lithological reservoirs. Further- more, drilling in the area has validated the predicated favorable areas of lithological reservoirs. It is therefore inferred that the sequence stratigraphic model can well predict and make an analogy to subtle reservoirs.

关 键 词：三级层序 层序地层格架 体系域 层序地层模式 岩性油藏有利区块 汤原断陷 

分 类 号：P539.2[天文地球—古生物学与地层学]