山东尚南断块古近系东营组沉积相及其古地理
|
摘要
尚南断块位于山东省胜利油田东营凹陷尚店油田西南部。该区的古近系东营组顶底均为不整合面或沉积间断面 ,发育了较好的湖侵三角洲相沉积。基于 10 0余口钻井、地震资料 ,70多张单井剖面柱状图编制及 14条剖面的对比 ,进行了东营组精细沉积相研究 ,编制出 30余幅沉积微相投点图和岩相古地理图。研究表明 ,东营组沉积时期气候潮湿、雨水丰沛、河流纵横、湖泊扩大、湖水变深等为处于斜坡带的尚南地区发育湖侵三角洲提供了良好的条件。控制该区沉积和地层发育的区域性物源来自埕宁隆起和鲁西隆起 ,但来自滨县凸起和林樊家突起的局部物源也有很大影响。东营期岩相古地理经历了早、中、晚期的演化 ,早期发育了以三角洲平原为主的沉积环境 ,中期形成了大范围的破坏性三角洲环境 ,晚期以前三角洲环境为特色
The south Shangdian fault block is located at the Shangdian Oilfield of Dongying Depression in Shengli Oilfield in Shandong Province. The Dongying Formation of the Paleogene is well defined by unconformity or discontinuous surface both at its top and bottom. Within this Formation, some delta deposits were developed due to lacustrine transgression. Based on the drilling log and seismic studies of over 100 wells, columnar maps of over 70 sections of single well and correlations of 14 sections in the Shangnan faulted block, the sedimentary facies of the Dongying Formation are well studied. More than 30 casting-dot maps of sedimentary microfacies and lithofacies palaeogeographic maps are designed. The results show that in the Dongying Age, the environment of flourish rainfall, moist climate, abundant rivers and lakes, and so on was favorable to developing lacustrine transgressive delta.Although the regional source areas, the Chengning uplift and Luxi uplift, might play an important role in controlling the sedimentary envirenment and sequence development,the local source areas,such as the Binxian and Linfanjia arch also play an important role in the delta development. There were three evolutional stages of lithofacies palaeogeography during the Dongying Age , including the Early, Middle and Late Age . During the Early Age, the sedimentary environment of delta plain predominated. In the Middle Age, the destructed delta was developed. In the Late Age, the foredelta was characterized.
The south Shangdian fault block is located at the Shangdian Oilfield of Dongying Depression in Shengli Oilfield in Shandong Province. The Dongying Formation of the Paleogene is well defined by unconformity or discontinuous surface both at its top and bottom. Within this Formation, some delta deposits were developed due to lacustrine transgression. Based on the drilling log and seismic studies of over 100 wells, columnar maps of over 70 sections of single well and correlations of 14 sections in the Shangnan faulted block, the sedimentary facies of the Dongying Formation are well studied. More than 30 casting-dot maps of sedimentary microfacies and lithofacies palaeogeographic maps are designed. The results show that in the Dongying Age, the environment of flourish rainfall, moist climate, abundant rivers and lakes, and so on was favorable to developing lacustrine transgressive delta.Although the regional source areas, the Chengning uplift and Luxi uplift, might play an important role in controlling the sedimentary envirenment and sequence development,the local source areas,such as the Binxian and Linfanjia arch also play an important role in the delta development. There were three evolutional stages of lithofacies palaeogeography during the Dongying Age , including the Early, Middle and Late Age . During the Early Age, the sedimentary environment of delta plain predominated. In the Middle Age, the destructed delta was developed. In the Late Age, the foredelta was characterized.
引文
[1]田海芹,马玉新,赵勇生,等东营凹陷尚南断块东营组沉积层序研究古地理学报,2000,2(2):37—45
[2]胜利油田石油地质志编写组中国石油地质志(卷六)北京:石油工业出版社,199651—83
[3]张世奇,纪友亮东营凹陷早第三纪古气候变化对层序发育的控制石油大学学报,1998,22(6):26—31
[4]操应长断陷湖盆层序地层下降体系域的划分石油大学学报,2000,24(1):104—109
[5]BarklerG 利用测井、岩心和露头资料进行硅质碎屑岩层序地层学分析田海芹等译世界石油科学,1992,36(增刊):1—71
[6]冯增昭沉积岩石学(下册)北京:石油工业出版社,199374—318
[7]冯增昭,王英华,刘焕杰,等中国沉积学北京:石油工业出版社,1994347—685
[8]赵澄林,吴崇筠油区岩相古地理北京:石油工业出版社,19871—5,6—257
[2]胜利油田石油地质志编写组中国石油地质志(卷六)北京:石油工业出版社,199651—83
[3]张世奇,纪友亮东营凹陷早第三纪古气候变化对层序发育的控制石油大学学报,1998,22(6):26—31
[4]操应长断陷湖盆层序地层下降体系域的划分石油大学学报,2000,24(1):104—109
[5]BarklerG 利用测井、岩心和露头资料进行硅质碎屑岩层序地层学分析田海芹等译世界石油科学,1992,36(增刊):1—71
[6]冯增昭沉积岩石学(下册)北京:石油工业出版社,199374—318
[7]冯增昭,王英华,刘焕杰,等中国沉积学北京:石油工业出版社,1994347—685
[8]赵澄林,吴崇筠油区岩相古地理北京:石油工业出版社,19871—5,6—257
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心