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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2013  >  35(4): 378-383
Ma Haiyong, Zhou Lifa, Zhang Xiaogang, Han Tianyou, Li Jihong, Liu Guanglin. Diagenesis and favorable diagenetic facies of Chang8 reservoir in Jiyuan area of Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2013, 35(4): 378-383. doi: 10.11781/sysydz201304378
Citation: Ma Haiyong, Zhou Lifa, Zhang Xiaogang, Han Tianyou, Li Jihong, Liu Guanglin. Diagenesis and favorable diagenetic facies of Chang8 reservoir in Jiyuan area of Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2013, 35(4): 378-383. doi: 10.11781/sysydz201304378
shu

Diagenesis and favorable diagenetic facies of Chang8 reservoir in Jiyuan area of Ordos Basin

doi: 10.11781/sysydz201304378
  • 1.

    Department of Geology, Northwest University, Xi'an, Shaanxi 710069, China

  • 2. Exploration and Development Research Institution/National Engineering Laboratory for Exploration and Development of Low-Permeability Oil & Gas Fields, Changqing Oilfield Company, Xi'an, Shaanxi 710018, China

  • 3. Exploration Department, Changqing Oilfield Company, Xi'an, Shaanxi 710018, China

  • Received Date: 2012-11-11
  • Rev Recd Date: 2013-06-04
  • Publish Date: 2013-07-28
    Abstract
  • 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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