石油与天然气地质 ›› 2008, Vol. 29 ›› Issue (6): 748-757.doi: 10.11743/ogg20080607

• 油气地质理论 • 上一篇    下一篇

松辽盆地升平气田营城组火山岩岩相及其储集性能控制因素分析

罗静兰1, 林潼1,2, 杨知盛3, 刘小洪1, 张军3, 刘淑云3   

  1. 1. 西北大学 大陆动力学国家重点实验室,陕西 西安 710069;
    2. 中国石油天然气股份有限公司 大庆油田分公司 采气公司,黑龙江 大庆 163000
  • 收稿日期:2008-11-10 出版日期:2008-12-24 发布日期:2012-01-16
  • 基金资助:

    国家重点基础研究发展规划(973)项目(2003CB214603);国家自然科学基金项目(40172055);长江学者和能源盆地油气地质创新团队资助项目(IRT0559)

Lithofacies and reservoir quality control factors of volcanics in the Yingcheng Formation in the Shengping gas field in the Songliao Basin

Luo Jinglan1, Lin Tong1,2, Yang Zhisheng3, Liu Xiaohong1, Zhang Jun3, Liu Shuyun3   

  1. 1. State Key Laboratory of Continental Dyaamics, Northwest University, Xi'an, Shaanxi 710069, China;
    2. Langfang Branch, Research Institute of Petroleum Exploration and Development, PetroChina, Langfang, Hubei 065007, China;
    3. Cas Prnrlnction Rranch Company of Daqing Oil Field Company Ltd., PetroChina, Daqing, Heilongjiang 163000, China
  • Received:2008-11-10 Online:2008-12-24 Published:2012-01-16

摘要:

升平气田下白垩统营城组火山岩的岩性学与岩相学、火山活动机制等研究结果显示,火山岩岩石类型主要为火山碎屑岩和火山熔岩,少量火山碎屑熔岩、沉火山碎屑岩、火山碎屑沉积岩和次火山岩。熔岩以流纹岩为主,少量英安岩。营城组重点含气层段营三段可划分为4个火山喷发-喷溢旋回。火山活动以喷发频率高和喷发迅速、间隔时间短和冷凝迅速、较强烈的中心式爆发与较宁静的裂隙式溢流喷发交替为特征。可识别出火山爆发相、火山溢流相、火山侵出相、火山通道相和火山沉积相5个相和溅落熔岩、火山碎屑岩、熔岩、火山重力流、火山颈和次火山岩6个亚相。高产气流井主要位于火山爆发相以及爆发相与溢流相互层地带。火山岩的储集性能主要受岩性、岩相、火山岩厚度及其空间分布特征的控制,其次受火山活动特点、古地貌、成岩作用与构造作用的影响。

关键词: 火山活动机制, 岩相与储集性能, 岩相学, 营城组火山岩, 升平气田, 松辽盆地

Abstract:

Study on lithology and petrography of volcanics and mechanism of volcanic activities in the Lower Cre-taceous Yingcheng Formation of the Shengping gas field in the Songliao Basin,indicates that rock types are mainly pyroclastics and lava,with minor pyroclastic lavas,sedimentary pyroclastic rocks,pyroclastic sedimentary rocks and sub-volcanic rocks.Lavas are dominated by rhyolite with minor dacite.Four volcanic eruption-effusion cycles can be recognized in the third member,the major gas-bearing interval,of Yingcheng Formation.The vol-canic activities are characterized by alternation of relatively quiet fissure effusion with relatively strong central eruption that features in high frequency,rapid eruptions,short intermittence,and quick condensation and consoli-dation.Five lithofacies (explosive,effusive,extrusive,volcanic conduit and volcanic-sedimentary facies)and six sub-facies(splash fall lava,pyroclastic,lava flow,volcanic gravity flow,volcanic neck and sub-volcanic) can be recognized.Wells with high gas flow rate are mainly located in areas with the volcanic explosive facies or interbe-ded explosive facies and effusive facies.The volcanic reservoir quality is mainly controlled by lithology,lithofa-cies,thickness and spatial distribution of volcanic rocks,followed by the characteristics of volcanic activity,pa-leogeomorphology,diagenesis and tectonic action.

Key words: mechanism of volcanic activity, lithofacies and reservoir quality, petrography, volcanic rock of the Yingcheng Formation, Shengping gas field, Songliao Basin

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