西南石油大学学报(自然科学版)

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Recognition of High Yield and Stable Yield Factors of Daanzhai Tight#br# Oil,Guihua Oilfield

Huang Dong1*, Yang Guang1, Wei Tengqiang1, Deng Yan1, Tan Yaqian2   

  1. 1. Exploration and Development Research Institute,Southwest Oil & Gas Field Company,PetroChina,Chengdu,Sichuan 610400,China
    2. Chuanzhong Division of Southwest Oil & Gas Field Company,PetroChina,Suining,Sichuan 629000,China
  • Online:2015-10-01 Published:2015-10-01

Abstract:

Based on study of Guihua Oilfield,the most productive Da′anzhai Oilfield in Sichuan,we recognize that there are
several pay beds of Da′anzhai reservoir and the Da2 sub-member is the most productive one. Shelly-beach limestone near the
sedimentary facies transformation zone are preferentially filled by the hydrocarbon laterally migrated from source rock on the
other side of this zone. Pressure difference caused by the hydrocarbon-generating pressurization is the migration force and low
angle fractures contributes to the oil & gas migration. According to analysis of the latest drilled horizontal well,GQ1H,we
come to the conclusion that low velocity abnormal bodies in shelly-beach limestone near the sedimentary facies transformation
zone are going to be the favorable targets of next horizontal oil well.

Key words: Guihua Oilfield;Da&prime, anzhai section;source-reservoir configuration;hydrocarbon-generating pressurization;lateral
migration;phase change zone;low velocity anomaly body

CLC Number: