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[1]王飞龙 燕 歌 陈容涛 汤国民 于 倩.渤中19-6地区深层油气赋存相态差异性及其成因机制*[J].中国海上油气,2021,33(03):58-68.[doi:10.11935/j.issn.1673-1506.2021.03.006]
 WANG Feilong YAN Ge CHEN Rongtao TANG Guomin YU Qian.Difference and its genetic mechanism of deep hydrocarbon occurrence phases in BZ19-6 area[J].China Offshore Oil and Gas,2021,33(03):58-68.[doi:10.11935/j.issn.1673-1506.2021.03.006]
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渤中19-6地区深层油气赋存相态差异性及其成因机制*()

《中国海上油气》[ISSN:1673-1506/CN:11-5339/TE]

卷:
第33卷
期数:
2021年03期
页码:
58-68
栏目:
渤海潜山领域勘探开发成果专辑
出版日期:
2021-06-25

文章信息/Info

Title:
Difference and its genetic mechanism of deep hydrocarbon occurrence phases in BZ19-6 area
文章编号:
1673-1506(2021)03-0058-11
作者:
王飞龙 燕 歌 陈容涛 汤国民 于 倩
(中海石油(中国)有限公司天津分公司 天津 300452)
Author(s):
WANG Feilong YAN Ge CHEN Rongtao TANG Guomin YU Qian
(CNOOC China Limited, Tianjin Branch, Tianjin 300452, China)
关键词:
渤海 渤中19-6地区 深层油气 赋存相态 差异性 成因机制
Keywords:
Bohai sea BZ19-6 area deep hydrocarbon occurrence phase difference genetic mechanism
分类号:
TE122.1
DOI:
10.11935/j.issn.1673-1506.2021.03.006
文献标志码:
A
摘要:
运用多种相态类型判识方法对渤海渤中19-6大型油气田烃类流体赋存相态进行了综合判识,并基于地层流体高温高压物性特征、油气有机地化特征,结合区域地质背景、烃源岩热演化和成藏过程,对该地区油气赋存相态的成因机制进行了详细分析。研究结果表明:渤中13-2油藏为高挥发油藏,渤中19-6油气藏为特高含凝析油凝析气藏,渤中21-22气藏为高含CO2的湿气气藏; 渤中19-6地区深层油气赋存相态整体受控于烃源岩热演化导致的晚期天然气充注强度,此外新近纪以来埋深增温引起的逆蒸发、深部无机CO2气体充注作用也是所形成的次生凝析气藏和高含CO2气藏的重要因素; 渤中19-6地区深层油气赋存相态变化可总结为烃类气充注渐变与CO2气充注突变的差异充注的油气相变模式。本文研究成果可为渤海海域深层未来勘探中油气相态研究提供科学依据,并对类似盆地的深层油气勘探具有重要的借鉴意义。
Abstract:
In this paper, the occurrence phases of hydrocarbon fluid in BZ19-6 large oil and gas field in Bohai sea are comprehensively identified by using multiple phase identification methods, and the genetic mechanism of hydrocarbon occurrence phases in this area is analyzed in detail based on the high-temperature and high-pressure physical properties of formation fluid, organic geochemical characteristics of oil and gas, in combination with regional geological background, thermal evolution and accumulation processes of source rocks. The results show that the BZ13-2 is a highly volatile oil reservoir, the BZ19-6 is a condensate gas reservoir with ultra-high condensate oil content, and the BZ21-22 is a wet gas reservoir with high CO2 content; the occurrence phases of deep hydrocarbon in BZ19-6 area is overall controlled by the late gas filling intensity caused by thermal evolution of source rocks, and the reverse evaporation and deep inorganic CO2 gas filling caused by geothermal burial depth since Neogene are also important factors for the formation of secondary condensate gas reservoirs and high CO2 gas reservoirs; the change of deep hydrocarbon occurrence phases in BZ19-6 area can be summarized as the hydrocarbon phase change mode of differential filling between hydrocarbon gas filling gradation and CO2 gas filling mutation. The research results in this paper can provide a scientific basis for the study of deep hydrocarbon phases in future exploration of Bohai sea area, and have important reference significance for deep oil and gas exploration in similar basins.

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备注/Memo

备注/Memo:
*“十三五”国家科技重大专项“渤海海域勘探新领域及关键技术研究(编号:2016ZX05024-003)”部分研究成果。
第一作者简介: 王飞龙,男,高级工程师,主要从事石油天然气地质研究工作。地址:天津市滨海新区海川路2121号渤海石油管理局B座(邮编:300452)。E-mail:wangfl3@cnooc.com.cn。
更新日期/Last Update: 2021-06-25