Diagenesis and Favorable Diagenetic Facies of Chang8 Reservoir in Jiyuan Area of Ordos Basin
详细信息
- 责任者：Ma Haiyong (Department of Geology ; Northwest University ; Xi’an 710069 ; China) ; Zhou Lifa
- 刊名：Petroleum Geology & Experiment
- 出版年：2013
- 卷期：35(4)
- 关键词：砂岩储集层 ; sandstone reservoirs ; 成岩作用 ; diagenesis ; 鄂尔多斯盆地 ; Ordos Basin
- 页码：p.378-383
- 图表：illus., 37 refs.
- 分类号：1003
- issnNo：ISSN1001-6112
- isbnNo：CN32-1151/TE
摘要
The diagenesis and favorable diagenetic facies of Chang8 reservoir in Jiyuan area of the Ordos Basin were studied by means of cast thin section,SEM and reservoir comprehensive evaluation.The Chang8 sandstones were during the subphase A of late diagenesis.Compaction effect caused the disappearance of primary pores.Influenced by acidic diagenetic environment,feldspars were corroded,improving pore connectivity and permeability.In the well-developed chlorite film which generated during early stage,a large quantity of primary pores was preserved,showing good reservoir physical property.According to diagenetic and sedimentary features,4 diagenetic facies belts were classified.The diagenetic facies belts of feldspar corrosion and chlorite film-intergranular pore were most favorable,mainly distributing in sandbody zones in subaqueous distributary channel of delta front in Liumaoyuan and Baoziwan areas,and in distributary channel of delta in Xiaojianzi area.
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