摘要
杏十二区纯油区位于杏树岗油田南部,葡Ⅰ2、葡Ⅰ3为主力油层,其他为非主力油层。为分析葡Ⅰ3小层6沉积时间单元储层沉积特征并进行合理有效的开发调整,以河流沉积学理论、高分辨率层序地层学新理论为依据,提出井井对比方法、平面井网对比法、成因移界方法,解决了复杂的河流-三角洲地层统层对比的难题。识别出1种亚相7种微相类型,并建立了测井微相模式。结果显示,杏十二区葡Ⅰ3小层6沉积时间单元存在分流河道、小型决口河道、废弃河道、天然堤、决口扇、溢岸砂、分流间泥等多种类型储层,但以各类河道(分流河道、小型决口河道、废弃河道)砂体为主;天然堤、决口扇、溢岸砂多为含泥粉砂、粉砂质泥和纯泥,很难成为有效储层。精细刻画成因单砂体,建立了3种储层沉积模式,即大型复合河道砂体、中型分流河道砂体、小型分流河道砂体。
Pure oil area of twelfth section in the Xing region locates in the south of Xingshugang oilfield,with the major reservoirs of PuⅠ2 and Pu Ⅰ3.The contrast method of well-to-well and plane well pattern and the origin to move is applied for analyzing depositional features of reservoirs on 6 sedimentary time units of the PuⅠ3 sublayers and making an effectively reasonable development adjustment.It solved the difficulty of sublayers′ unification and correlation in complicated fluvial-delta based on the theory of fluvial sedimentology and new theory of high resolution sequence stratigraphy.One subfacies and seven microfacies are distinguished.Logging microfacies model is established.The result shows that the 6 sedimentary time units of the PuⅠ3 sublayers in twelfth section in the Xing region have many types of reservoirs： distributary channel,small-scale crevasse channel,abandond channel,natural levee,crevasse splay,overbank sand,distributary mud and so on.But the main is every type of channel sandbody.The natural levee,crevasse splay and overbank sand are difficult to be effective reservoir for their content of mud-bearing silt,silty mud and unmixed mud.Identical formation origin of single sand body is delibrately depicted.Three reservior depositional patterns are established： big compound channel sandbody,medium-size distributary channel sandbody and small-size distributary channel sandbody.
出处
《中外能源》
CAS
2011年第3期64-67,共4页
Sino-Global Energy
关键词
沉积时间单元
测井微相模式
沉积微相
沉积模式
层序地层学
sedimentary time unit
logging microfacies model
sedimentary microfacies
depositional pattern
sequence stratigraphic
