地学前缘 ›› 2023, Vol. 30 ›› Issue (4): 100-111.DOI: 10.13745/j.esf.sf.2022.10.24

• 深层陆相碎屑岩常规油气地质 • 上一篇    下一篇

松辽盆地南部断陷层火山岩储层特征及油气成藏主控因素

李瑞磊1(), 杨立英2,*(), 朱建峰1, 刘玉虎1, 徐文1, 李忠博1, 樊薛沛1, 冷庆磊1, 张婷婷1   

  1. 1.中国石化东北油气分公司, 吉林 长春 130062
    2.吉林大学 应用技术学院, 吉林 长春 130061
  • 收稿日期:2022-08-16 修回日期:2022-09-21 出版日期:2023-07-25 发布日期:2023-07-07
  • 通讯作者: *杨立英(1971—),女,博士,副教授,主要从事地震智能信号处理、嵌入式系统应用的研究工作。E⁃mail: yangly@jlu.edu.cn
  • 作者简介:李瑞磊(1970-),男,博士,教授级高级工程师,现中国石化东北油气分公司首席专家,主要从事石油地质综合研究工作。E-mail: lirl.dbsj@sinopec.com
  • 基金资助:
    中国石化科技项目“松南断陷火山岩气藏一体化技术研究与应用”(P21104)

Volcanic reservoir characteristics and hydrocarbon accumulation control factors of rift depressions in southern Songliao Basin

LI Ruilei1(), YANG Liying2,*(), ZHU Jianfeng1, LIU Yuhu1, XU Wen1, LI Zhongbo1, FAN Xuepei1, LENG Qinglei1, ZHANG Tingting1   

  1. 1. Sinopec Northeast Oil and Gas Branch, Changchun 130062, China
    2. Applied Technology College, Jilin University, Changchun 130061, China
  • Received:2022-08-16 Revised:2022-09-21 Online:2023-07-25 Published:2023-07-07

摘要:

松辽盆地南部断陷层火石岭组中-基性火山岩广泛发育,是松辽盆地深层油气勘探的热点。本文通过宏观到微观多尺度综合分析,开展火山岩形成与分布、岩性岩相与火山机构类型、储集空间特征和油气成藏特征等方面研究,总结深层火山岩有效储层形成机制及成藏主控因素。研究表明:(1)火石岭组中-基性火山岩分布广泛,多呈低幅丘状、多期叠置连片分布;火山岩主要发育3种岩相、7种亚相;发育“孔隙+缝网”复合型有效储集空间类型;(2)火山机构控制岩性、岩相分布,决定原生孔隙的形成与分布;构造作用、溶蚀作用利于构造裂缝及次生溶蚀孔缝的形成,是控制形成优质储层的关键因素;(3)优质储层和保存条件是油气富集的主控因素。

关键词: 松辽盆地南部, 断陷层, 火山岩, 有效储层, 成藏主控因素

Abstract:

Intermediate-basic volcanic rocks of the Huoshiling Formation are widely developed in rift depressions in southern Songliao Basin. In this present study we investigated the volcanic rock distribution, lithology and lithofacies, volcanic structure types, reservoir space characteristics and gas accumulation characteristics through comprehensive multi-scale analysis, and then discussed the formation mechanism of effective reservoir space and the main controlling factors of hydrocarbon accumulation. We found that (1) intermediate-basic volcanic rocks are widely distributed in the basin mainly as multi-stage superimposed, connected low-amplitude mounds. The rock develops 3 types of lithofacies and 7 types of subfacies as well as a composite pore-fracture network-type reservoir space. (2) Volcanic structures control the lithology and lithofacies distribution, and determine the formation and distribution of primary pores; while tectonic movements and rock dissolution are conducive to the formation of structural fractures and secondary dissolution pores and fractures, and they are the key factors controlling the formation of high-quality reservoirs. (3) The reservoir control mechanism can be described by a quaternary model: The paleostructural setting during the accumulation period determines the direction of hydrocarbon accumulation; the favorable hydrocarbon generation center of the deep depression provides the material basis for the hydrocarbon accumulation and dynamic conditions; the multi-type, multi-scale pore-fracture development zones control the distribution of favorable reservoirs and determine the degree of oil and gas enrichment; and stable mudstone and late-stage weak tectonic activities provide better preservation conditions for the development of petroleum reservoirs.

Key words: Songliao Basin, faulted layer, volcanic rock, effective reservoir, main controlling factors of accumulation

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