原生韵律型火山岩储层特征及主控因素

黄芸; 梁舒艺; 杨迪生; 冀冬生; 伏小鹏

doi:10.3969/j.issn.1006-6535.2021.06.007

特种油气藏 >

2021 , Vol. 28 >Issue 6: 54 - 61

DOI: https://doi.org/10.3969/j.issn.1006-6535.2021.06.007

地质勘探

原生韵律型火山岩储层特征及主控因素

黄芸 ,
梁舒艺 ,
杨迪生 ,
冀冬生 ,
伏小鹏

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1.中国石油新疆油田分公司,新疆乌鲁木齐 830013;
2.中海石油(中国)天津分公司,天津 300452

黄芸(1969—),女,高级工程师,1989年毕业于西北大学地质学专业,现主要从事火山岩储层及综合地质研究工作。

收稿日期: 2020-07-09

修回日期: 2021-10-15

网络出版日期: 2022-02-16

基金资助

中国石油科技重大专项“准噶尔盆地天然气藏主控因素及关键技术研究与应用”( 2017E-0403)

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Characteristics and Main Controlling Factors of Primary Rhyolite Volcanic Reservoir

Huang Yun ,
Liang Shuyi ,
Yang Disheng ,
Ji Dongsheng ,
Fu Xiaopeng

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1. PetroChina Xinjiang Oilfield Company, Urumqi, Xinjiang 830013, China;
2. CNOOC Tianjin Branch, Tianjin 300452, China

Received date: 2020-07-09

Revised date: 2021-10-15

Online published: 2022-02-16

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摘要

近年来准噶尔盆地火山岩勘探实践表明,石炭系火山岩储层类型除风化壳型储层之外,距石炭系顶面300 m之下仍有物性较好的火山岩储层发育。为进一步明确该类原生型储层特征并为勘探部署提供依据,开展了火山岩原生型储层的成因机理、岩石类型、物性特征、空间分布、韵律性特征及主控因素等方面的研究,提出有别于火山岩风化壳储层的“原生型层状多期韵律式储层”的概念,简称原生韵律型火山岩储层。原生韵律型储层分布具有大面积、大跨度、纵向分布不受埋深控制的特点,储集空间主要为多期次喷溢旋回中每个旋回的顶、底发育与挥发分逃逸有关的原生孔隙;岩浆演化和火山活动序列是主要控制因素。该成果使石炭系火山岩纵向勘探深度得到拓展,勘探目的层选择由单一风化壳型储层向多期次喷发旋回发育的原生型储层转变,指导发现了多个石炭系内幕油气藏。该研究对其他盆地火山岩勘探有借鉴意义。

关键词： 准噶尔盆地; 风化壳; 原生韵律型火山岩储层; 多期次喷发旋回; 主控因素

本文引用格式

黄芸 , 梁舒艺 , 杨迪生 , 冀冬生 , 伏小鹏 . 原生韵律型火山岩储层特征及主控因素[J]. 特种油气藏, 2021 , 28(6) : 54 -61 . DOI: 10.3969/j.issn.1006-6535.2021.06.007

Abstract

In recent years, the volcanic rock exploration in Junggar Basin has shown that, in addition to weathered crustal reservoirs, there are still volcanic reservoirs with sound physical properties developing below 300 m from the top of the Carboniferous volcanic rock. In order to further clarify the characteristics of these primary reservoirs and provide a basis for exploration and deployment, studies were carried out on the genesis mechanism, rock type, physical characteristics, spatial distribution, rhythmical characteristics and main controlling factors of the primary volcanic reservoirs, and the concept of "primary stratified multi-stage rhyolite reservoir", which was different from the weathered crust reservoirs of volcanic rocks, was proposed, and referred to as primary rhyolite volcanic reservoir. The distribution of primary rhyolite reservoirs was characterized by large area, large span, and vertical distribution not controlled by burial depth, and the reservoir space was mainly the primary pore associated with volatile escape at the top and bottom of each multi-stage eruption cycles; magmatic evolution and volcanic activity sequence were the main controlling factors. This achievement has expanded the longitudinal exploration depth of Carboniferous volcanic rocks, and the exploration target layer has changed from single weathered crust reservoir to primary reservoir developed in multi-stage eruption cycles, guiding the discovery of multiple Carboniferous insider oil and gas reservoirs. There is much for reference to the exploration of volcanic rocks in other basins.

Key words： Junggar Basin; weathered crust; primary rhyolite volcanic reservoir; multiple eruption gyrations; main controlling factors

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