石油与天然气地质 ›› 2004, Vol. 25 ›› Issue (6): 703-706,712.doi: 10.11743/ogg20040620

• 勘探开发 • 上一篇    下一篇

花土沟油田下油砂山组-上干柴沟组藻灰岩储层特征

张振城1, 孙建孟1, 马建海2, 霍玉雁2, 苏远大1   

  1. 1. 石油大学,山东东营 257061;
    2. 中国石油青海油田分公司,甘肃敦煌 736202
  • 收稿日期:2004-12-02 出版日期:2004-12-25 发布日期:2012-01-16
  • 基金资助:

    中国石油天然气集团公司勘探开发项目

Characteristics of algal limestone reservoirs in Xiayoushashan-Shangganchaigou Formations in Huatugou oilfield, western Qaidam basin

Zang Zhencheng1, Sun Jianmeng1, Ma Jianhai2, Huo Yuyan2, Su Yuanda1   

  1. 1. University of Petroleum, Dongying, Shandong;
    2. Qinghai Oilfield Company, PetroChina, Dunhuang, Gansu
  • Received:2004-12-02 Online:2004-12-25 Published:2012-01-16

PDF (PC)

660

被引次数

29

摘要：

花土沟油田下油砂山组-上干柴沟组藻灰岩储层主要有藻纹层灰岩、藻泥晶灰岩、亮晶鲕粒灰岩、亮晶介屑灰岩、亮晶藻团粒灰岩和陆屑泥晶灰岩等,其中前两类的储层物性较好。藻灰岩储层的形成主要受沉积环境的稳定性、早期淋溶和晚期胶结-充填作用的控制。藻灰岩储层在测井曲线上显示出较高的自然伽马值,在地震剖面上表现为强反射特征。利用这些特征可以进行藻灰岩储层的横向展布分析。经几口井的试油,藻灰岩储层都有油气显示,证实该类储层良好的油气前景。

关键词: 花土沟油田, 藻灰岩, 淡水淋溶, 次生溶孔, 横向展布

Abstract:

Algal limestone reservoirs in Xiayoushashan Shangganchaigou Formations in Huatugou oilfield in western Qaidam basin mainly consist of algal laminated limestone,algal micrite,oosparite,sparry coquina,sparry algal lump limestone and terrigenous clastic micrite,of which the former two types of limestone have relatively good reservoir properties.The formation of algal limestone reservoirs has mainly been controlled by the stability of sedimentary environment,early eluviation and late cementation filling.Algal limestone reservoirs appear to have relatively high gamma ray value in well logs and strong reflectance signatures in seismic profiles.These characteristics can be used to determine lateral distribution of algal reservoirs.Formation testings in several wells have got oil/gas shows in algal limestone reservoirs,verifing that this type of reservoirs has good prospectiveness.

Key words: Huatugou oilfield, algal limestone, fresh water eluviation, secondary solution opening, lateral distribution

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