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鄂尔多斯盆地东南部延长群的划分及其在油田开发中的应用
引用本文:王平,张志升,孟海峰.鄂尔多斯盆地东南部延长群的划分及其在油田开发中的应用[J].地层学杂志,2013(1):62-72.
作者姓名:王平  张志升  孟海峰
作者单位:长安大学地球科学与资源学院;延长油田股份有限公司杏子川采油厂
基金项目:国土资源部重大项目“鄂尔多斯盆地矿产资源综合评价与规划”陕西子课题(1212011088008)资助
摘    要:鄂尔多斯盆地延长组岩石地层学和含油气层系划分的研究已愈百年。虽研究者众多,却观点不一。为了油田的准确、高效开发,同一区域内同一套岩石地层的含油气层系划分应该有统一的标准,岩石地层的划分是含油气层系划分的基础。鄂尔多斯盆地内中—晚三叠世形成的一套河—湖相沉积物的延长群含油气层系,由十个油层组(长1~长10)二级单位组成,其中长2油层组可分作3个油层段(长12~长32)。长12油层段又可进一步地细分、厘定为3个复(油)层和若干个单(油)层。

关 键 词:岩石地层  地层划分  油田开发  延长群  鄂尔多斯盆地

STRATIGRAPHY OF THE YANCHANG GROUP OF SOUTHEASTERN ORDOS BASIN AND ITS APPLICATION TO OILFIELD DEVELOPMENT
WANG Ping,ZHANG Zhi-sheng,and MENG Hai-feng.STRATIGRAPHY OF THE YANCHANG GROUP OF SOUTHEASTERN ORDOS BASIN AND ITS APPLICATION TO OILFIELD DEVELOPMENT[J].Journal of Stratigraphy,2013(1):62-72.
Authors:WANG Ping  ZHANG Zhi-sheng  and MENG Hai-feng
Institution:2 ) 1 ) College of Earth Science and Resources , Chang’an University , Xi’an 710054 ; 2 ) Xingzichuan Oil Production Plant , Yanchang Oil-field Co.Ltd. , Yan’an 716000
Abstract:A century stratigraphic investigation of the oil-and gas-bearing Yanchang Formation in the Ordos Basin has generated numerous schemes of stratigraphic subdivision and correlation.For the purpose of oilfield development , the subdivision of oil-and gas-bearing sequence should be based on lithostratigraphy. The Yanchang Group includes sediments deposited in lacustrine and fluvial environments in the middle-late Triassic Period in the Ordos Basin.We propose that the oil-and gas-bearing sequence of the Yanchang Group can be subdivided into ten oil-and gas-bearing formations ( Chang1-Chang10 ) .Of these formations , the Chang2 can be subdivided into three oil and gas-bearing members ( Chang12-Chang32 ) .The Chang12 oil member can be further divided into three compound oil and gas-bearing layers and several single layers. The detailed stratigraphic study of the Chang12 oil member is a key to the oilfield development in the area.
Keywords:lithostratigraphy  stratigraphic division  oilfield development  Yanchang Group  Triassic  Ordos Basin  Shaanxi
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