石油勘探与开发 >

2018 , Vol. 45 >Issue 6: 923 - 935

DOI: https://doi.org/10.11698/PED.2018.06.01

油气勘探

白云岩成因类型、识别特征及储集空间成因

  • 赵文智 ,
  • 沈安江 ,
  • 乔占峰 ,
  • 潘立银 ,
  • 胡安平 ,
  • 张杰
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  • 1. 中国石油勘探开发研究院,北京 100083;
    2. 中国石油杭州地质研究院,杭州 310023;
    3. 中国石油集团碳酸盐岩储层重点实验室,杭州 310023
赵文智（1958-）,男,河北昌黎人,博士,中国石油勘探开发研究院教授级高级工程师,中国工程院院士,主要从事石油天然气地质综合研究和科研管理工作。地址：北京市海淀区学院路20号,中国石油勘探开发研究院,邮政编码：100083。E-mail：zwz@petrochina.com.cn

收稿日期: 2017-12-01

  修回日期: 2018-06-18

  网络出版日期: 2018-05-23

基金资助

国家科技重大专项“大型油气田及煤层气开发”（2016ZX05004-002）

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Genetic types and distinguished characteristics of dolomite and the origin of dolomite reservoirs

  • ZHAO Wenzhi ,
  • SHEN Anjiang ,
  • QIAO Zhanfeng ,
  • PAN Liyin ,
  • HU Anping ,
  • ZHANG Jie
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  • 1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;
    2. Hangzhou Institute of Petroleum Geology, PetroChina, Hangzhou 310023, China;
    3. Key Laboratory of Carbonate Reservoir, CNPC, Hangzhou 310023, China

Received date: 2017-12-01

  Revised date: 2018-06-18

  Online published: 2018-05-23

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摘要

针对白云岩成因、原生白云石沉淀、白云岩孔隙成因等问题,在前人认识的基础上,补充四川和塔里木盆地典型案例的岩石学和地球化学特征分析工作,取得3项进展：①提出基于岩石特征、形成环境和时间序列的白云岩成因分类,不同成因白云岩之间的成岩域、特征域界线清晰,演化线索清楚,更具系统性和连续性;②建立不同成因白云岩的岩石学和地球化学特征识别标志,白云岩之间的岩石学和地球化学特征的变化具有规律性,是连续时间序列上形成环境变迁的响应;③重新评价白云石化作用对孔隙的贡献,阐明白云岩中的孔隙主要来自原岩的沉积原生孔、部分来自表生溶蚀和埋藏溶蚀作用,早期白云石化有利于孔隙的保存。这些认识对白云岩成因的理解、不同成因白云岩的判识具重要的理论意义,同时对白云岩储集层预测具有重要的指导意义。图6表4参53

关键词： 白云岩成因类型; 白云岩识别特征; 白云岩孔隙成因; 原生沉淀白云石; 沉积原生孔

本文引用格式

赵文智 , 沈安江 , 乔占峰 , 潘立银 , 胡安平 , 张杰 . 白云岩成因类型、识别特征及储集空间成因[J]. 石油勘探与开发, 2018 , 45(6) : 923 -935 . DOI: 10.11698/PED.2018.06.01

Abstract

To find out the origin of dolomite, the precipitation of primary dolomite, and the formation of pores in dolomite, petrologic and geochemical characteristics of typical samples from Sichuan and Tarim Basin were analyzed based on the previous understandings, and three aspects of results were achieved. (1) A classification of dolomite origins based on petrologic features, forming environment and time sequence was proposed, which shows clear boundaries of diagenetic and characteristic realms and evolved clues between different types of dolomite. (2) Petrographic and geochemical identification marks for different types of dolomite were presented, revealing that the orderly geochemical variation of different types of dolomite is the response to the change of forming environment of dolomite during continuous time sequence. (3) The contribution of dolomitization to the formation of porosity was re-evaluated, revealing that the porosity in dolomite was mostly attributed to the primary pores and supergene dissolution and burial dissolution, and early dolomitization was conducive to the preservation of primary pores. These understandings are of great theoretical significance for identifying the origins and types of dolomite, and can guide the prediction of dolomite reservoirs.

Key words： dolomite genetic types; dolomite distinguished characteristics; dolomite porosity origin; protodolomite; primary porosity

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