岩性油气藏 ›› 2017, Vol. 29 ›› Issue (6): 69–75.doi: 10.3969/j.issn.1673-8926.2017.06.009

• 技术方法 • 上一篇    下一篇

柴达木盆地西部盐湖相有效烃源岩测井识别

李延丽1, 王建功1,2, 石亚军1, 张平1, 徐丽1   

  1. 1. 中国石油勘探开发研究院 西北分院, 兰州 730020;
    2. 中国石油天然气集团公司 油藏描述重点实验室, 兰州 730020
  • 收稿日期:2017-04-11 修回日期:2017-05-22 出版日期:2017-11-21 发布日期:2017-11-21
  • 作者简介:李延丽(1973-),女,高级工程师,主要从事测井资料综合解释及油气储层预测等方面的研究工作。地址:(730020)甘肃省兰州市城关区雁儿湾路535号。Email:li_yanli@petrochina.com.cn。
  • 基金资助:
    国家重大科技专项"柴达木复杂构造区油气成藏、关键勘探技术与新领域目标优选"(编号:2016ZX05003-006)资助

Logging identification of effective source rocks in salt-lake facies in western Qaidam Basin

LI Yanli1, WANG Jiangong1,2, SHI Yajun1, ZHANG Ping1, XU Li1   

  1. 1. PetroChina Research Institute of Petroleum Exploration and Development-Northwest, Lanzhou 730020, China;
    2. Key Laboratory of Reservoir Characterization, CNPC, Lanzhou 730020, China
  • Received:2017-04-11 Revised:2017-05-22 Online:2017-11-21 Published:2017-11-21

摘要: 近年来,在柴达木盆地西南部英雄岭西段下干柴沟组上段首次发现了大型盐湖相自生自储油藏。为了明确该地区自生自储型油藏的油气成藏机理,并有效预测油气资源量,通过典型井岩心观察、地球化学分析、测井响应特征对比等,建立了地化参数标定下的自然伽马-电阻率测井曲线重叠法进行烃源岩识别,确定了盐湖相烃源岩的岩性及测井上定性或定量识别标准,并运用该方法对红狮凹陷烃源岩进行测井识别。柴达木盆地西南部盐湖相烃源岩不同于淡水湖盆相烃源岩,盐湖相烃源岩具有较强的非均质性,电性特征为高伽马、高电阻率的泥岩及灰质泥岩是有效烃源岩。利用自然伽马-电阻率重叠法识别烃源岩方法简单、效果直观、准确率高,对复杂岩性区油气资源量的快速评价及勘探部署具有重要的意义。

关键词: 多层合采, 井筒变流量, 模型拟合, 积液点筛选, 携液临界流量, 东海西湖凹陷

Abstract: In recent years,a big salt-lake facies self-generation and self-storage reservoir was discovered firstly in upper Xiaganchaigou Formation(E32)in western Yingxiong Mountain of southwestern Qaidam Basin. In order to clear hydrocarbon accumulation mechanism and effectively estimate resources,it is very important to identify and evaluate effective hydrocarbon source rock in salt-lake facies. Based on core observation, geochemical analysis, logging correlation of typical wells,an overlap method of natural gamma ray-resistivity logging curve was established to identify hydrocarbon source rocks and to determine the lithology of hydrocarbon source rock based on geochemical parameters calibration. The logging qualitative and quantitative identification standards in the saltlake facies were determined and applied in Hongshi Depression. The salt-lake facies source rocks in the western Qaidam Basin have strong heterogeneity,only calcareous mudstone with high gamma and high resistivity is effective hydrocarbon source rock. It is simple,effective and accurate to identify source rocks by natural gammaresistivity overlap method. It is of great significance for rapid evaluation and exploration deployment of oil and gas resources in complex lithologic area.

Key words: multi-completion, variable wellbore-rate, model fitting, hydrops nodes selection, critical liquid carrying flow rate, Xihu Sag in the East China Sea

中图分类号: 

  • TE132.2
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