塔里木盆地中东部中下奥陶统颗粒滩发育特征及分布

发布时间：2018-06-27 11:22

本文选题：沉积相 + 颗粒滩　；参考：《岩性油气藏》2017年05期

【摘要】：塔里木盆地中东部顺托果勒地区及邻区已取得重大油气突破,为了对该区早中奥陶世颗粒滩的发育及分布展开进一步研究,应用钻测井、岩心、薄片、地震等资料,对颗粒滩的特征、演化、分布规律等进行综合分析。研究区发育局限台地中低能颗粒滩、开阔台地中低能颗粒滩、开阔台地中高能颗粒滩、台地边缘颗粒滩、台地边缘生物丘-生物礁等沉积亚相,且不同滩体间常交互沉积。鹰山组沉积时期,顺托果勒地区为台内缓斜坡—低凹带,广泛发育开阔台地颗粒滩,导致局部地层厚度增大;一间房组沉积时期,随着海平面快速上升,台内颗粒滩向古城地区和顺托果勒北部地区迁移,从而使得这2个地区地层厚度增大。研究认为,古地貌是颗粒滩发育与否及其发育模式的决定性因素,而海平面的变化控制了颗粒滩的发育过程和沉积样式。
[Abstract]:In order to further study the development and distribution of early and middle Ordovician granular beaches in the Shuntogol area and its adjacent areas in the central and eastern part of the Tarim Basin, drilling logs, cores, thin slices, earthquakes and other data have been used to further study the development and distribution of grain banks in the early and middle Ordovician in the Tarim Basin. The characteristics, evolution and distribution of granular beach are comprehensively analyzed. In the study area, sedimentary subfacies were developed, such as the middle and low energy granular beach in the limited platform, the high energy granular beach in the open platform, and the biohile-reef in the edge of the platform, and the sedimentary bodies of different beach bodies interacted with each other. During the depositional period of Yingshan formation, the Shuntogol area was a gentle slope and low concave zone within the platform, and the open platform granular beach was widely developed, which resulted in an increase in the thickness of the local strata, and in the deposition period of the Yijianfang formation, with the rapid rise of sea level, The grain beach in the platform migrates to the Gucheng area and the northern area of Shuntogol, which makes the stratigraphic thickness of the two areas increase. It is considered that paleogeomorphology is the decisive factor for the development of granular beach and its development model, and the change of sea level controls the development process and sedimentary style of granular beach.
【作者单位】：中国石化勘探开发研究院无锡石油地质研究所;中国石化西北油田分公司勘探开发研究院;
【分类号】：P618.13

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