摘要
以东营凹陷石村断层下降盘古近系沙三段—沙二段为研究对象,综合钻井、录井、测井和地震等资料,对研究区的沉积、演化等特征及主控因素进行研究。结果表明:研究区沙三段主要发育三角洲平原、三角洲前缘、滨浅湖和滩坝亚相,物源主要来自广饶凸起和鲁西隆起。沙二段主要发育辫状河三角洲前缘、三角洲前缘、滨浅湖和滩坝亚相。受广饶凸起物源供给影响,辫状河三角洲前缘亚相主要分布于研究区东部,南部以来自鲁西隆起的三角洲前缘亚相为主。从沙三段2砂组—沙二段1砂组,研究区沉积充填总体呈现退积—进积式。断层活动性、古气候变化和物源供给强度等对研究区沉积发育及演化具有主要控制作用。
Based on well logging,drilling,seismic interpretation and other data,the sedimentary evolution characteristics and the main controlling factors of the 2nd and 3rd members of Paleogene Shahejie Formation in downthrown side of Shicun Fault in Dongying sag were researched. The result shows that the sedimentary facies of the 3rd member of Shahejie Formation includes delta plain subfacies,delta front subfacies,shore-shallow lake subfacies and beach-bar subfacies. The southeastern Guangrao Salient and the southwestern Luxi Uplift were the two major provenances in this depositional period. The braided delta front subfacies,delta front subfacies,shore-shallow lake subfacies and beach-bar subfacies were identified in the 2nd member of Shahejie Formation. The braided delta front subfacies developed in the eastern zone of the study area,which was affected by the source supply of Guangrao Salient. The delta front subfacies originated from Luxi Uplift developed in the southern zone dominantly. The sedimentary filling process was from retrogradation to progradation during the deposition of the 3rd member and the 2nd member of Shahejie Formation. The development and evolution of sedimentary fa-cies were mainly affected and controlled by fault movement,supply intensity of provenances and paleoclimate.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2017年第2期22-29,共8页
Petroleum Geology and Recovery Efficiency
基金
山东省自然科学基金项目"东营凹陷陡坡带古近系深层砂砾岩成岩演化与次生孔隙分布规律研究"(ZR2009EL005)
关键词
沉积特征
沉积演化
主控因素
沙三段-沙二段
石村断层
东营凹陷
sedimentary characteristics
sedimentary evolution
main controlling factors
2nd and 3rd members of Shahejie Formation
Shicun Fault
Dongying sag
