西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

川中桂花油田大安寨段致密油高产稳产再认识

黄东1 *,杨光1,韦腾强1,邓燕1,谭雅倩2   

  1. 1. 中国石油西南油气田分公司勘探开发研究院,四川成都610400
    2. 中国石油西南油气田分公司川中油气矿,四川遂宁629000
  • 出版日期:2015-10-01 发布日期:2015-10-01
  • 通讯作者: 黄东,E-mail:hdong@petrochina.com.cn
  • 基金资助:

    中国石油集团公司重大专项(2012E 2601)。

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

摘要:

在国内外致密油调研的基础上,通过对川中地区勘探开发效益最好的桂花油田大安寨段油藏的解剖,认为桂
花油田大安寨段油藏虽然存在多产层特征,但主力产油层位尤以大二亚段最为发育,勘探、开发成效最为显著;烃储配
置分析表明,平面上处于相变带附近的介壳滩体是烃源岩生烃增压后油气运移和聚集的必然场所,即侧向近源运移、
充注是此类致密油的主要运聚方式:(1)相变带附近的介壳滩处于低压,是油气近源运移、聚集的有利场所;(2)相变
带增加了烃源岩与介壳滩的接触面积,使介壳滩体具有“包裹”特征,进一步增加了油气侧向聚集的效率;(3)发育的
低角度层裂缝,有助于烃源岩排出的烃类顺层向相变带附近介壳滩体疏导。结合最新钻探的GQ1H 井认为,处于烃源
岩突变带附近的介壳滩体中的低速异常体是下步有利的水平钻探目标。

关键词: 桂花油田, 大安寨段, 烃储配置, 生烃增压, 侧向运移, 相变带, 低速异常体

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

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