济阳坳陷东营组沉积体系新认识

发布时间：2018-06-17 04:30

本文选题：断陷末期 + 东营组　；参考：《油气地质与采收率》2016年03期

【摘要】：东营组作为济阳坳陷断陷末期沉积的重要层系,对其沉积体系认识不清导致对其储层分布、油藏类型、成藏规律不明确,从而制约了东营组的勘探。综合钻井、测井、地震等资料,依据沉积学基本原理和方法,通过断陷末期盆地地质构造特征及岩相古地理多因素分析表明,济阳坳陷东营组沉积时期在单斜式构造背景控制下形成了东部跨凹陷的大型辫状河三角洲沉积,东三段沉积时期是辫状河三角洲主要发育期,东二段湖盆收缩、沉积范围缩小,西部以滨浅湖沉积为主,伴有小型的近源扇三角洲及近岸水下扇沉积,东部演化为以河流相为主。东一段沉积时期湖盆萎缩,广泛发育河流相及滨浅湖沉积。平面上充填样式表现为由南部的东营凹陷辫状河三角洲平原亚相、前缘亚相向北部沾化—滩海地区的前三角洲亚相过渡,前三角洲发育一定规模的滑塌浊积扇。东营组沉积模式的建立不仅完善了济阳坳陷新生代沉积演化序列,对东营组储层预测起到了重要指导作用,而且也为今后东营组成藏条件的研究奠定了基础。
[Abstract]:Dongying formation is an important stratigraphic system of late depositional formation in Jiyang depression. Unclear understanding of its sedimentary system leads to unclear reservoir distribution, reservoir type and reservoir formation, which restricts the exploration of Dongying formation. According to the basic principles and methods of sedimentology and the comprehensive data of drilling, logging and earthquake, the geological structure characteristics and lithofacies and paleogeography of the basin at the end of fault depression are analyzed. Under the control of monocline tectonic background, the Dongying formation of Jiyang depression formed a large braided river delta deposit in the eastern cross sag during the sedimentary period. The sedimentary period of the eastern third member is the main developing period of the braided river delta, and the lake basin of the eastern second member shrinks and the sedimentary range is reduced. The west is dominated by shallow lake sediments, accompanied by small near-source fan deltas and near-shore underwater fan deposits, and the eastern evolution is dominated by fluvial facies. The lake basin atrophied and the fluvial facies and littoral shallow lake deposits were widely developed in the first member of the eastern part. The filling pattern on the plane is from braided river delta plain subfacies in the Dongying depression in the south to the front subfacies in the northern Zhanhua-beach area. The pre-delta has developed a certain scale slump turbidite fan. The establishment of the sedimentary model of Dongying formation not only improved the Cenozoic sedimentary evolution sequence of Jiyang Depression, but also played an important guiding role in reservoir prediction of Dongying formation, and laid a foundation for the study of the reservoir conditions of Dongying formation in the future.
【作者单位】：中国石化胜利油田分公司勘探开发研究院;中国石化胜利油田分公司;
【基金】：国家科技重大专项“渤海湾盆地精细勘探关键技术”子课题“济阳坳陷油气富集机制与增储领域”(2011ZX05006-003)
【分类号】：P618.13

【相似文献】