石油与天然气地质 ›› 2020, Vol. 41 ›› Issue (1): 26-36, 49.doi: 10.11743/ogg20200103

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华北北部地区蓟县系高于庄组-雾迷山组白云岩储层特征与形成主控因素

李朋威1(), 何治亮2,*(), 罗平3, 金廷福4, 张英1, 冯建赟1, 宋金民4, 徐士林1   

  1. 1. 中国石化 石油勘探开发研究院, 北京 100083
    2. 中国石油化工股份有限公司, 北京 100728
    3. 中国石油 勘探开发研究院, 北京 100083
    4. 成都理工大学 能源学院, 四川 成都 610059
  • 收稿日期:2019-07-22 出版日期:2020-02-01 发布日期:2020-01-19
  • 通讯作者: 何治亮 E-mail:lipw.syky@sinopec.com;hezl.syky@sinopec.com
  • 作者简介:李朋威(1983-),男,博士、高级工程师,沉积与储层地质研究。E-mail:lipw.syky@sinopec.com
  • 基金资助:
    国家自然科学基金项目(U1663209);国家科技重点专项(2017ZX05005-002-009);中国科学院A类战略性先导项目(XDA14010201)

Characteristics of and main factors controlling the dolomite reservoir of Gaoyuzhuang-Wumishan Formations in the Jixian System, the north of North China

Pengwei Li1(), Zhiliang He2,*(), Ping Luo3, Tingfu Jin4, Ying Zhang1, Jianyun Feng1, Jinmin Song4, Shilin Xu1   

  1. 1. Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China
    2. China Petroleum & Chemical Corporation, Beijing 100728, China
    3. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
    4. College of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, China
  • Received:2019-07-22 Online:2020-02-01 Published:2020-01-19
  • Contact: Zhiliang He E-mail:lipw.syky@sinopec.com;hezl.syky@sinopec.com
  • Supported by:
    国家自然科学基金项目(U1663209);国家科技重点专项(2017ZX05005-002-009);中国科学院A类战略性先导项目(XDA14010201)

摘要:

华北北部地区蓟县系高于庄组-雾迷山组白云岩储层以岩石与储集空间类型多样、孔隙结构与受控因素复杂以及非均质性强为特征,并由此制约了该区油气和地热等资源的勘探与开发。以野外露头和岩心为研究对象,开展了大量的野外地质考察、岩心观察、薄片鉴定与物性分析等研究工作,进一步总结分析了高于庄组-雾迷山组白云岩储层特征及其优质储层形成主控因素。研究结果表明,高于庄组-雾迷山组发育一套以微生物白云岩为主的储层类型,岩石结构构造复杂,其中,锥状叠层石和凝块石为其最有利的储集岩石类型。按照储集空间组合,可将储层划分为孔洞缝复合型、裂缝-孔隙型和孔隙型3种类型。其中,蓟县系雾迷山组白云岩储层以孔洞缝复合型为主,物性最好;高于庄组则以裂缝-孔隙型和孔隙型主,物性相对较差。综合分析认为,研究区高于庄组-雾迷山组规模优质白云岩储层是多种因素耦合作用的结果,其中微生物礁滩、印支期以来的构造隆升、破裂及溶蚀作用为其形成主控因素。

关键词: 微生物岩, 白云岩储层, 高于庄组, 雾迷山组, 蓟县系, 华北北部地区

Abstract:

The dolomite reservoirs of Gaoyuzhuang-Wumishan Formations in North China are characterized by strong variety in reservoir rock types and pore space types, which are controlled by complex factors and caused strong heterogeneity in reservoir quality. They in turn seriously hinders the exploration and development of oil-gas and geothermal resources in this area. The study comprehensively analyzes and summarizes the characteristics of dolomite reservoirsand main factors controlling the formation of high-quality reservoirs in this area. Observations and studies are carried out on both outcrops and cores through large number of field geological surveys and core observation, thin section identification and physical property analyses. The results show that the reservoirs dominated by microbiological dolomites with complex textures and structures were developed herein, among which the coniform stromatolites and thrombolites are the most favorable rocks for reservoir. According to the pattern of reservoir space assemblages, the reservoirs could be categorized into 3 types:composite pore-cavity-fissure reservoir, fissure-pore reservoir and pore reservoir. Among them, the Wumishan Formation in the Jixian System are dominated by the composite pore-cavity-fissure type, relatively better in physical property. Whereas the Gaoyuzhuang Formation are of typical fissure-pore and pore types, relatively poorer in reservoir property. In conclusion, multiple factors contribute to the formation of large-scale high-quality dolomite reservoirs in the study area, with the microbiological reef-shoal facies, as well as the Indosinian tectonic uplifting, fracturing and dissolution, as the main factors leading to better reservoir quality.

Key words: microbialite, dolomite reservoir, Gaoyuzhuang Formation, Wumishan Formation, Jixian System, the north of North China

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