石油与天然气地质 ›› 1984, Vol. 5 ›› Issue (4): 373-384.doi: 10.11743/ogg19840408

• 论文 • 上一篇    下一篇

东明凹陷石油地质特征

陈晓东, 周济之, 邱阳辉, 郭友   

  1. 华北石油地质局地质研究大队
  • 收稿日期:1984-03-10 出版日期:1984-12-25 发布日期:2012-01-16

PETROLEUM GEOLOGY FEATURES OF DONGMING DEPRESSION

Chen Xiaodong, Zhou Jizhi, Qiu Yanghui, Guo You   

  1. Geological Research Brigade, Huabei Bureau of Petroleum Geology
  • Received:1984-03-10 Online:1984-12-25 Published:2012-01-16

摘要:

东明凹陷是华北坳陷区南部的新生代断陷盆地,地处中原,跨鲁、豫两省,北窄南宽,形如帚状,呈北北东向展布,面积约5000平方公里。凹陷东西两侧为鲁西隆起和内黄隆起,北接莘县凹陷,南以胙城—兰考凸起与中牟凹陷相隔。自1975年开展大规模石油普查勘探以来,八年间发现了文留、濮城、卫城、白庙、桥口等油气田,已经成为我国重要油气生产基地之一—中原油田。

Abstract:

Large scale of prospecting and exploration have been carried out in Dong-ming depression and several oil and gas pools have been found since 1975.Now a big oilfield-Zhongyuan Oilfield is founded there and the place has become one of the important production bases in the eastern part of China.Dongming depression is a graben bounded faults formed since early Tertiary (Eocene-Oligocene).The lower Tertiary can be divided into two sedimentary cycles separated by the base of the second member of the Shaheje Formation.The early,middle and late phases of each cycle had different ways of compensation and different complex of sedimentary facies.Subaerial and subaqueous alluvial fans,mass-flow and lacustrine flood plain sediments are well developed in this downwarped environment.Source rocks are developed in the middle phase of each cycle,and the third member of the Shaheje Formation is the main source rock.Organic matters,mainly of humus-sapropel type,are of middle abundance.The depth of upperand lower limits favourable to oil generation are 2,400m (90℃) and 4,100m(145℃) respectively.Dongming depression is lying in between Liaolan fault and Changyuan fault,comprising two subbasins and one uplift.The differential in time and strenth of faults'movements has controlled various kinds of subordinate basins and led to a number of local structures to form.Most of the structures are basement uplifting anticlinal structures and faulted-blocks.They constitute li-thostructural traps in combination with sandstones.The oil and gas pools can be divided into four groups:1)Inherited anticlinal oil pools;2)Anticlinal oil pools evolved from earlier stepfaults;3)Faulted block pools occurred on later step-faulted zone;and 4)Faultsealed oil pools developed on shallow slope of a half-graben.