饶阳凹陷馆陶组物源方向及其地质意义  

Analysis of provenance systems and their geological significance in the Guantao formation of Raoyang sag

作　　者：刘鹏[1] 宋国奇[2] 张扬 周军 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]中国石化胜利油田分公司,山东东营257000 [3]中国石油长庆油田分公司第六采油厂,陕西榆林718606 [4]中国石油长庆油田分公司第七采油厂,陕西延安717606

出　　处：《油气地质与采收率》2013年第5期15-18,112,共4页Petroleum Geology and Recovery Efficiency

基　　金：中国石油天然气股份有限公司重点科技攻关项目"冀中坳陷新近系成藏条件研究及勘探方向优选"(2008D-0702-04)

摘　　要：物源分析对确定沉积盆地物源区位置、沉积物搬运路径和沉积体系具有重要意义,还可以通过物源分析准确预测远景区油气生、储及盖层分布。通过砂岩碎屑组分、重矿物组合、ZTR指数进行分析,利用沉积法对地层沉积厚度以及砂岩含量分布特征进行研究,确定了饶阳凹陷馆陶组的物源方向。结果表明:饶阳凹陷馆陶组存在2个物源区,分别为东北部和西南部物源区,2个物源区的母岩类型都以变质岩为主,并在凹陷中部留路地区汇聚;东北部物源区为长石质岩屑砂岩区,成分成熟度较低,西南部物源区成分成熟度比东北部物源区略有提高,为岩屑质长石砂岩区,双向物源汇聚的留路地区为长石砂岩区。在物源体系的控制下,近源发育辫状河沉积,远源发育曲流河沉积,心滩和边滩砂为有利砂体,物源汇聚的留路地区为有利勘探区。物源方向的确定对研究沉积相展布、有利砂体分布及有利勘探区预测具有重要的意义。In order to provide guidance for exploration activity in the Guantao formation of Raoyang sag, the authors utilize the detrital components and its changes in the plane, heavy mineral assemble, ZTR coefficient, the thickness of layer and distribution characteristics of sand to research the provenances of Guantao formation in Raoyang sag. The analysis result shows that the provenances are derived from the northeastern and the southwestern of the Raoyang sag. Both provenances are metamorphic area and meet together at Liulu area in the center of Raoyang sag. The northeastern provenances has lower composition maturity, it is feldspathic lithic sandstone area; the southwestern provenances has the higher composition maturity than northeastern provenances, it is lithic feldspar sandstone area; the area of Liulu where two sources meet together is feldspar sandstone area. With the control of provenances, the braid river sedimentary facies distribution is near provenance area, and the meandering river sedimentary facies distribution is far away from provenance area, moreover, the channel bar and point bar are favorability sand bodies, and the area of Liulu where two sources meet together is of favorability prospect. The study on the provenances has important significance for sedimentary facies, sand body distribution and prediction of favorable exploration areas.

关 键 词：物源方向 重矿物 碎屑组分 馆陶组 饶阳凹陷 

分 类 号：TE111.3[石油与天然气工程—油气勘探]