西南石油大学学报(自然科学版) ›› 2010, Vol. 32 ›› Issue (5): 70-74.DOI: 10.3863/j.issn.1674-5086.2010.05.011

• 地质勘探 • Previous Articles     Next Articles

CHARACTERISTICS OF CLAY MINERALS IN W LOW RESISTIVITY RESERVOIRS AND THE GENESIS OF LOW RESISTIVITY

LIAO Ming-guang1，SU Chong-hua2，TANG Hong1，JIANG Wei3


  

  1. 1.School of Resources and Environment,Southwest Petroleum University,Chengdu Sichuan 610500,China;2.Research Institute of Exploration and Development,Zhanjiang Company,CNOOC,Zhanjiang Guangdong 524057,China;3.Research Institute of Exploration and Development,Chuanqing Drilling & Exploration Company,CNPC,Chengdu Sichuan 610051,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-10-20 Published:2010-10-20

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Abstract:

The reservoir of Z1 oil group in W Oilfield has low resistance,high-porosity and low permeability.The geological formation of low resistivity reservoir has many reasons.In view of the developing features of Z oil group,the clay minerals types,clay particles distribution,clay content and the influence of them on the low-resistivity are studied.It can be found that the clay types in low resistivity layer segment of Z1 oil group is mainly the mixed layer of illite and montomorillonite and the content is relatively high.The clay particles are evenly distributed in a thin film and in flocculating form with high average clay content.Additional conductivity caused by clay minerals and high clay content are the main factors affecting the low resistivity of Z1 oil group.

Key words: low-resistivity reservoir, clay minerals, additional conductivity, clay content, genesis of low resistivity

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