西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

同沉积期钙富集过程解析与形成机制研究

单敬福1 *,张倩2,彭妙2,郭兵3,高怀玺4   

  1. 1. 长江大学“油气资源与勘探技术”教育部重点实验室,湖北武汉430100;2. 中国石油新疆油田公司,新疆克拉玛依834000;
    3. 中国石油长庆油田分公司第一采油厂,陕西西安716000;4. 中国石油辽河油田兴隆台采油厂,辽宁盘锦124010
  • 出版日期:2016-08-01 发布日期:2016-08-01
  • 通讯作者: 单敬福,E-mail:shanjingfu2003@163.com
  • 基金资助:

    国家自然科学基金(41372125);湖北省教育厅基金(Q20121210);中国地质大学(武汉)“构造与油气资源”教育部重点实验室开放基
    金(TPR 2012 23)。

Mechanism and Process Analysis of Calcareous Precipitation in the#br# Syndepositional Stage

SHAN Jingfu1*, ZHANG Qian2, PENG Miao2, GUO Bing3, GAO Huaixi4   

  1. 1. MOE Key Laboratory of Exploration Technologies for Oil and Gas Resources,Yangtze University,Wuhan,Hubei 430100,China
    2. Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang 834000,China
    3. No 1. Production Plant,Changqing Oilfield Company,PetroChina,Xi′ an,Shaanxi 716000,China
    4. Xinglongtai Oil Production Plant,Liaohe Oilfield Company,PetroChina,Panjin,Liaoning 124010,China
  • Online:2016-08-01 Published:2016-08-01

摘要:

浅表长石砂岩中钙积层的存在是影响储层物性的重要因素之一,在古沉积地表环境中,钙的富集一般以成
片、板状等形式产出。针对上述问题,通过物理化学分析手段,指出Ca2+ 的来源、Ca2+ 富集条件、钙积层形成机理及
其主控因素。研究结果表明,Ca2+ 从硅铝酸盐矿物颗粒中分离出来,与大气酸性水的存在密不可分,湖平面的持续下
降,气候干旱,蒸发量大于降水量,河道频繁迁移摆动,河湖过渡处水流不畅等因素,有利于重碳酸钙分解形成碳酸钙
沉淀,使钙积层成片、成板状大范围分布,因此,弄清钙积层形成的主控因素及形成机理,对油田后期的高效开发无疑
具有重要意义。

关键词: 钙积层, 地下水, 大气酸性水, 古沉积环境, 成因

Abstract:

The caliche in the superficial arcose in paleodepositional environments is one of the important factors affecting
reservoir physical property. In paleodepositional surface environments,the concentration of calcium is generally in the form
of plates and flakes. The paper points out the origin of the Ca2+,the conditions of the concentration of the Ca2+ and the
mechanism and dominant factors of the caliche formation through physical-chemical study. The results show that the Ca2+
is dissociated from silicon aluminate particles,which is closely connected with the existence of the atmospheric acidic water.
When the climate is dry,with the evaporation larger than precipitation,the lake surface keeps decreasing,the river diverts or
the transition flow blocked,etc.,which are all beneficial for the decomposition of the heavy calcium carbonate,thus making
the plate-like and flaky caliches widely scattered. Therefore,we hold that a clear understanding of the mechanism and dominant
factors of calcium concentration is of significance in the efficient exploitation in the late period of production.

Key words: caliches, groundwater, atmospheric acidic water, paleodepositional environments, cause

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