西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (2): 73-78.

• 地质勘探 • Previous Articles     Next Articles

INFLUENCES OF CLAY MINERALS ON PHYSICAL PROPERTIES OF TIGHT SAND-STONES OF XUJIAHE FORMATION IN GUANG’AN AREA

SONG Li-hong 1,2 ZHU Ru-kai 2 ZHU De-sheng 2 SUI Shao-qiang 3 ZHOU Chuan-min 2

  

  1. 1. School of Earth sciences and Resources, China University of Geosciences, Haidian, Beijing 100083, China; 2. Petroleum Geology Research and Laboratory Center, Research Institute of Exploration and Development, Haidian, Beijing 100083, China;3. Department of Overseas New Venture Assessment, Research Institute of Exploration and Development, Haidian,Beijing 100083, China）Journal of Southwest Petroleum University, Vol. 33, No. 2, 73 – 78, 2011（1674 – 5086，in Chinese
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-04-20 Published:2011-04-20

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Abstract: Clay minerals are widely distributed in the T3x, they are important source rocks and cement in tight sandstones, and they are the main controlling factors of the qualities of reservoirs. Based on the appraisal of the core
thin section, clay minerals in sandstone are analyzed comprehensively and systematically by using SEM and X-ray.The result shows that the chlorite rim which is developed in the early stage of diagenesis can prohibit the overgrowth of quartz, so it is very important for the preservation of primary porosity. Authigenic illite seriously reduces porosity and permeability by cutting the primary and second intergranular pores into micro-pores. Authigenic kaolinite often forecasts secondary pore development zones which are only founded in T3x6 member.

Key words: clay minerals, low porosity and permeability, tight sandstones, Xujiahe Formation, reservoir physical property

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