大港探区上古生界沉积特征与控制因素

发布时间：2018-01-07 15:10

本文关键词：大港探区上古生界沉积特征与控制因素　出处：《地球科学》2017年11期 　论文类型：期刊论文

【摘要】：大港探区上古生界近期取得一系列勘探突破,展现出良好的勘探前景,已成为重要的储量接替领域.但其勘探程度较低,对于沉积相类型与沉积演化认识上的欠缺制约着该层系勘探的深入和井位的部署.以沉积学理论为指导,在岩心、薄片、测井和录井等资料研究的基础上,明确了区内上古生界各组发育的沉积相类型与沉积演化过程,分析了沉积相发育的控制因素.研究表明,区内本溪组发育障壁海岸相和碳酸盐台地相,太原组发育障壁海岸相、碳酸盐台地相和湿地相,山西组发育浅水三角洲相,下石盒子组和上石盒子组发育河流相.本溪组至上石盒子组的沉积相类型反映了晚古生代海侵作用的肇始、发展、衰退的过程.构造作用、海平面变化和古气候共同控制着沉积相类型的发育.
[Abstract]:A series of exploration breakthroughs have been made in the Upper Paleozoic in the Dagang exploration area recently, showing a good prospect of exploration, which has become an important reserve replacement field, but its exploration degree is relatively low. The lack of understanding of sedimentary facies type and sedimentary evolution restricts the depth of exploration and the deployment of well location. Based on the theory of sedimentology, the study of core, thin slice, logging and logging is based on the theory of sedimentology. The types and evolution processes of sedimentary facies in each group of Upper Paleozoic in this area are clarified and the controlling factors of sedimentary facies development are analyzed. The study shows that the Benxi formation developed barrier coastal facies and carbonate platform facies. Taiyuan formation developed barrier coast facies, carbonate platform facies and wetland facies, Shanxi formation developed shallow water delta facies. Fluvial facies are developed in Lower Shihezi formation and Shangshihezi formation. The sedimentary facies types of upper Shihezi formation in Benxi formation reflect the initiation, development and decline of late Paleozoic transgression. The development of sedimentary facies is controlled by sea level change and paleoclimate.
【作者单位】：中国石油大学地球科学与技术学院;中国石油大港油田公司勘探开发研究院;
【基金】：国家油气重大专项(No.2016ZX05006-007)
【分类号】：P512.2;P618.13
【正文快照】： 大港探区中浅层新生界已进入精细勘探阶段,而对于上古生界等深部层系的勘探一直处于探索阶段,研究和认识程度较低;“八·五”期间的研究认为大港探区本溪组-太原组发育海陆过渡相,山西组具有三角洲沉积的特征,下石盒子组和上石盒子组发育河流相(于志海等,1997);“十二·五”期

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