西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

二连盆地致密油形成特征及勘探潜力

王建1,2 *,孔庆明2,董雄英2   

  1. 1. 中国矿业大学地质学博士后流动站,北京海淀100083
    2. 中国石油华北油田勘探开发研究院,河北任丘062552
  • 出版日期:2016-04-11 发布日期:2016-04-11
  • 通讯作者: 王建,E-mail:yjy_wangj@petrochina.com.cn
  • 基金资助:

    中国石油天然气股份有限公司科技项目(2013E 050204);国土资源部油气资源评价及矿业权管理支撑系统建设专项(1A14YQKYQ-
    0102)。

The Formation Characteristics and Exploration Potential of Tight Oil in#br# Erlian Basin

  1. 1. Geology Post Doctoral Station,China University of Mining & Technology,Haidian,Beijing 100083,China
    2. Exploration and Development Research Institute,Huabei Oilfield Company,PetroChina,Renqiu,Hebei 062552,China
  • Online:2016-04-11 Published:2016-04-11

摘要:

二连盆地普遍发育低孔、低渗透性储层,位于洼槽区及构造翼部的下白垩统巴彦花群腾格尔组下段与巴彦花
群阿尔善组顶部特殊岩性段与致密砂砾岩段储层尤为致密,空气渗透率一般小于0.5 mD。巴彦花群腾格尔组下段与
巴彦花群阿尔善组顶部发育含云灰质为特征的特殊岩性段和湖相黏土质泥岩两类优质烃源岩,致密储层与优质烃源
岩构成源储一体或互层状分布,利于油气就近运移成藏。致密储层段孔喉结构复杂,呈低产低压特征;特殊岩性段白
云石含量较高、脆性大,含油性及原油物性较好,利于储层压裂改造。虽然单个凹陷分布规模较小,但总体规模较大,
资源预测结果表明,致密油资源量达到近10×108 t。在今后较长时间内,勘探工作应为致密油与岩性油藏并重。

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关键词: 二连盆地, 致密油, 优质烃源岩, 特殊岩性段, 致密储层

Abstract:

Reservoirs in Erlian Basin are generally with low porosity and low permeability. Reservoir in the special lithologic
section and tight glutenite segment in the trough area and tectonic wings under the top of K1bt1 and K1ba is particularly dense
with air permeability less than 0.5 mD. Two types of high-quality source rocks characteristic of special lithology containing a
cloud of gray matter and clayey lacustrine mudstones developed under the top of K1bt1 and K1ba. Hydrocarbon source rock
and tight reservoir are distributed as one or interbedded layers,which is favorable for hydrocarbon migration and accumulation.
Tight reservoir has a complex pore structure,and is characteristic of low production and low pressure. With high dolomite
content and brittleness,special lithologic reservoir is of good oil-bearing and physical properties,and is favorable for fracturing.
Although a single depression is small in size,but the whole reservoir is of large scale. Predicted by oil and gas resources,tight
oil resources amount is nearly one billion. The exploration work in the future should be focused on both tight oil and lithologic
reservoirs.

Key words: Erlian Basin, tight oil, high quality hydrocarbon source rocks, special lithologic section, tight reservoir

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