沉积学报2011，Vol.29Issue(6)：1206-1212,7.
马岭—镇北地区延长组长8油组的砂体类型与多层叠置的连续型油藏特征
Characteristics and Reservoir Forming Mode of the Oil Pools of Chang 8 Reservoir in Maling-Zhenbei Area,Ordos Basin
摘要
Abstract
By using the principles and research methods of sedimentology,the observation and description of core,integrated with the use of logging data,and so on.This paper investigates the characteristics of various kinds of sand bodies from the aspects of lithology,logging property and sedimentary structures and so on.Through the reservoir study of the Chang 8 oil pools,the sand bodies in Chang 8 oil pools are divided into mouth bars and channels,among which channels can be further Subdivided into 3 types,including subaqueous distributary channels,subaqueous deep-incised channels and waterways in fans.The time and space distribution of sand bodies are regular.With the organic coordination of other oil accumulation conditions,such as the favorable reservoir forming conditions which extensively developed reservoir sandstone,adjacent to chang-7 source rock formation,shielded by mudstone,and influenced by the sedimentary modes of sand bodies,the oil pools in which multilayer oil reservoir overlays each other and distributes continuously are formed by the above 4 types of sand bodies.The characteristics of the oil pools are as follow： Firstly,the oil pools are in the sedimentary system in which sand bodies overlay each other and distribute continuously in slope zones and center of lakes.Toward the lake center,there are subaqueous distributary channel zone,the mixing zone of subaqueous deep-incised channels and waterways in fans,and the mixing zone of waterways and mouth bar.Secondly,the 4 types of sand bodies overlay each other randomly in space.The overlaying patterns are both of tabular and staggered.However,they have different stratigraphic attributes.Thirdly,multilayer sand bodies contribute to continuous reservoir,but they have respective oil-water systems.Oil reservoir,gas reservoir,water layer and dry layer are concomitant with each other.On the basis of above,this paper finds the reservoir forming mode of ＂multilayer oil reservoir overlays each other＂ of Chang 8 Formation.关键词
储层砂体/连续型油藏/多层叠置/成藏模式/延长组Key words
reservoir sand bodies/continuous petroleum reservoirs/multilayer reservoir overlay/reservoir forming mode/Yanchang Formation分类
能源科技引用本文复制引用
孟祥宏,王多云,李树同,李建霆,刘军锋,张其超,左博..马岭—镇北地区延长组长8油组的砂体类型与多层叠置的连续型油藏特征[J].沉积学报,2011,29(6):1206-1212,7.基金项目
国家科技重大专项“大型油气田及煤层气开发”子课题（编号：2008ZX05001-004-04）资助 （）
