渤海湾盆地济阳坳陷潜山油气藏成藏期次和过程——来自储层流体包裹体的证据

张芷晴; 刘华; 马立驰; 刘景东; 郭志扬

doi:10.11781/sysydz202201129

渤海湾盆地济阳坳陷潜山油气藏成藏期次和过程——来自储层流体包裹体的证据

doi: 10.11781/sysydz202201129

张芷晴^{1, 2,},
刘华^{1, 2, ,},
马立驰³,
刘景东^{1, 2},
郭志扬^{1, 2}

1.
中国石油大学(华东) 深层油气重点实验室, 山东青岛 266580
2.
中国石油大学(华东) 地球科学与技术学院, 山东青岛 266580
3.
中国石化胜利油田分公司勘探开发研究院, 山东东营 257015

基金项目:

国家自然科学基金创新研究群体项目 41821002

国家科技重大专项 2016ZX05006-003

详细信息

作者简介:
张芷晴(1996-), 女, 硕士研究生, 从事油气成藏与分布规律研究。E-mail: Shirley.cheung@outlook.com

通讯作者:
刘华(1977-), 女, 教授, 博士生导师, 从事油气藏形成机理与分布规律研究。E-mail: liuhua77@upc.edu.cn

中图分类号: TE122.31
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- 被引次数: 0
出版历程
- 收稿日期: 2020-05-26
- 修回日期: 2021-11-26
- 刊出日期: 2022-01-28

Characteristics of reservoir fluid inclusions and hydrocarbon charging process in the Dawangzhuang buried hill zone of Jiyang Depression, Bohai Bay Basin

ZHANG Zhiqing^{1, 2
,},
LIU Hua^{1, 2
, ,},
MA Lichi³,
LIU Jingdong^{1, 2},
GUO Zhiyang^{1, 2}

1.
Key Laboratory of Deep Oil and Gas, China University of Petroleum(East China), Qingdao, Shandong 266580, China
2.
School of Geosciences, China University of Petroleum(East China), Qingdao, Shandong 266580, China
3.
Research Institute of Petroleum Exploration and Development, SINOPEC Shengli Oilfield Company, Dongying, Shandong 257015, China

摘要

摘要: 渤海湾盆地济阳坳陷古生界潜山油气藏储量巨大，但成藏过程复杂，制约了油气勘探进程。为了探明其油气充注与调整改造过程，以大王庄潜山带为例，利用包裹体岩相学、显微测温及烃包裹体丰度分析等技术，对古生界油气成藏进行了研究。研究区古生界储层烃包裹体发育，奥陶系烃包裹体呈淡黄色、蓝绿色荧光，沿方解石脉及颗粒愈合缝分布，沥青包裹体与油质沥青仅在大古671油藏少量分布，均一温度主峰为80~90℃和100~110℃；石炭—二叠系储层烃包裹体呈蓝绿色荧光，赋存于石英颗粒微裂隙及次生加大边，均一温度主峰为100~110℃。结合烃源岩生排烃期可以得出，研究区古生界存在两期油气充注：第一期发生在东营组沉积晚期（27~25 Ma），为古生界小规模成藏，以奥陶系为主；第二期发生在馆陶组沉积末期—明化镇组沉积末期（5~2 Ma），为奥陶系和石炭—二叠系大规模成藏。大古671井区附近沥青包裹体的发育以及含烃包裹体有效网格（EGOI）显示古油水界面低于现今油水界面的现象，与明化镇组沉积末期（2 Ma）大1断层的活动有关，导致油气藏发生了局部调整，范围变小。
- 流体包裹体 /
- 古油水界面 /
- 油气成藏期次 /
- 潜山油气藏 /
- 古生界 /
- 济阳坳陷 /
- 渤海湾盆地
Abstract: The Dawangzhuang buried hill zone is a typical representative of Paleozoic oil and gas exploration in the Jiyang Depression, Bohai Bay Basin, and has experienced a complicated accumulation process. Using petrographic observation, microthermometry and abundance of hydrocarbon inclusions, the Paleozoic hydrocarbon charging process in Dawangzhuang buried hill zone was discussed. The study shows that the Paleozoic reservoirs developed hydrocarbon inclusions in the study area. Ordovician hydrocarbon inclusions with pale yellow and blue-green fluorescence distributed along the calcite veins and particle healing joints. Asphalt inclusions and oleaginous are only distributed in Dagu 671 oil reservoir with a small scale. The main peaks of the homogenization temperature are from 80 ℃ to 90 ℃ and from 100 ℃ to 110 ℃; Carboniferous-Permian hydrocarbon inclusions with blue-green fluorescent distributed along the micro-cracks of quartz particles and secondary enlarged edges. The main peak of the homogenization temperature is from 100 ℃ to 110 ℃. Combining with the hydrocarbon generation and expulsion periods of source rocks, it can be concluded that there are two stages of hydrocarbon charging in the Paleozoic in the study area. The first stage of oil and gas charging occurred in the late Dongying period (27~25 Ma), which was a small-scale accumulation of Paleozoic, mainly in the Ordovician; the second stage of oil and gas charging occurred from the end of Guantao period to the end of Minghuazhen period (5~2 Ma), which was a large-scale accumulation of Ordovician and Carboniferous-Permian. The development of asphalt inclusions near the Dagu 671 well area and the fact shown by the Effective Grids containing Oil Inclusions (EGOI) that the ancient oil-water interface is lower than the current one are related to the activity of the Da 1 fault at the end of the Minghuazhen period (2 Ma), resulting in local adjustments and smaller scope of oil and gas reservoir.
- fluid inclusion /
- ancient oil-water interface /
- hydrocarbon accumulation stage /
- buried hill reservoir /
- Paleozoic /
- Jiyang Depression /
- Bohai Bay Basin

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图 1 渤海湾盆地济阳坳陷大王庄潜山带地质概况

Figure 1. Geological sketch map of Dawangzhuang buried hill zone in Jiyang Depression, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 2 渤海湾盆地济阳坳陷大王庄潜山带典型包裹体观测样品手标本

a.大古671井，O₂mx，3 087.6 m，深灰色灰岩见溶蚀孔与方解石脉；b.大古671井，O₂mx，3 121.2 m，灰白色灰岩见垂直孔缝；c.大古675井，O₂mx，3 403.4 m，深灰色灰岩见方解石脉；d.大古675井，O₂ms，2 922.3 m，灰白色灰岩见方解石脉；e.大671井，C-P，2 970.2 m，深灰色含砾砂岩见油气显示；f.大671井，C-P，2 966.8 m，深灰色泥质粉砂岩见铁质侵染；g.大51井，C-P，2 941.0 m，灰色细砂岩孔隙发育；h.大51井，C-P，3 637.5 m，灰色碳质砂岩

Figure 2. Typical inclusion sample hand specimen of Dawangzhuang buried hill zone in Jiyang Depression, Bohai Bay Basin

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图 3 渤海湾盆地济阳坳陷大王庄潜山带奥陶系流体包裹体镜下分布特征

a.大古671井，O₂ms，2 941.0 m，烃包裹体分布在方解石颗粒表面，透射光，×50；b.大古671井，O₂ms，2 941.0 m，淡黄色荧光烃包裹体分布在方解石颗粒表面，荧光，×50；c.大古675井，O₂ms，2 922.3 m，烃包裹体呈线状分布在方解石愈合缝及方解石脉，透射光，×50；d.大古675井，O₂ms，2 922.3 m，蓝绿色荧光烃包裹体呈线状分布在方解石愈合缝及方解石脉，荧光，×50；e.大古675井，O₂ms，2 922.3 m，烃包裹体成群分布在方解石脉，透射光，×20；f.大古675井，O₂ms，2 922.3 m，蓝绿色荧光烃包裹体分布在方解石脉，荧光，×20；g.大古671井，O₂ms，3 043.6 m，烃包裹体与沥青类包裹体呈带状分布在方解石颗粒表面，透射光，×50；h.大古671井，O₂ms，3 043.6 m，淡黄色荧光、蓝绿色荧光烃包裹体与沥青类包裹体呈带状分布在方解石颗粒表面，荧光，×50

Figure 3. Microscopic characteristics of Ordovician fluid inclusions of Dawangzhuang buried hill zone in Jiyang Depression, Bohai Bay Basin

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图 4 渤海湾盆地济阳坳陷大王庄潜山带奥陶系储层沥青镜下特征

a.大古671井，O₂ms，3 043.6 m，沥青充填于岩石基质溶孔内，透射光，×20；b.大古671井，O₂ms，3 043.6 m，淡蓝色沥青充填于岩石基质溶孔内，荧光，×20；c.大古671井，O₂ms，3 043.6 m，沥青充填于岩石微裂缝内，透射光，×20；d.大古671井，O₂ms，3 043.6 m，淡蓝色沥青充填于岩石微裂缝内，荧光，×20

Figure 4. Microscopic characteristics of asphalt in Ordovician reservoir of Dawangzhuang buried hill zone in Jiyang Depression, Bohai Bay Basin

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图 5 渤海湾盆地济阳坳陷大王庄潜山带石炭—二叠系流体包裹体镜下分布特征

a.大671井，2 760.5 m，烃包裹体沿切及石英颗粒微裂隙分布，透射光，×50；b.大671井，2 760.5 m，蓝绿色荧光烃包裹体沿切及石英颗粒微裂隙分布，荧光，×50；c.大671井，2 567.4 m，烃包裹体沿石英加大边内侧成带分布，透射光，×50；d.大671井，2 567.4 m，蓝绿色荧光烃包裹体沿石英加大边内侧成带分布，荧光，×50；e.大671井，2 794.2 m，烃包裹体沿石英颗粒微裂隙分布，透射光，×50；f.大671井，2 794.2 m，蓝绿色荧光烃包裹体沿石英颗粒微裂隙分布，荧光，×50；g.大51井，3 867.0 m，盐水包裹体分布在石英颗粒表面，透射光，×20；h.大51井，3 867.0 m，无荧光盐水包裹体分布在石英颗粒表面，荧光，×20

Figure 5. Microscopic characteristics of Carboniferous-Permian fluid inclusions of Dawangzhuang buried hill zone in Jiyang Depression, Bohai Bay Basin

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图 6 渤海湾盆地济阳坳陷大王庄潜山带不同荧光颜色烃包裹体伴生的盐水包裹体均一温度分布

Figure 6. Histogram of homogenization temperature of salt water inclusions associated with hydrocarbon inclusions of different fluorescent color of Dawangzhuang buried hill zone in Jiyang Depression, Bohai Bay Basin

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图 7 渤海湾盆地济阳坳陷大王庄潜山带不同荧光颜色烃包裹体伴生的盐水包裹体盐度分布

Figure 7. Histogram of salinity of salt water inclusions associated with hydrocarbon inclusions of different fluorescent color of Dawangzhuang buried hill zone in Jiyang Depression, Bohai Bay Basin

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图 8 渤海湾盆地济阳坳陷大王庄潜山带大古671井奥陶系上马家沟组储层烃包裹体EGOI分布

a.2 941 m，微裂缝及方解石愈合缝里总有效网格数12个，含烃包裹体有效网格数3个，EGOI值为3/12=25%，透射光，×20；b.2 941 m，淡黄色荧光烃包裹体沿微裂缝及方解石愈合缝分布，荧光，×20；c.2 982 m，方解石愈合缝里总有效网格数11个，含烃包裹体有效网格数2个，EGOI值为2/11=18.2%，透射光，×20；d.2 982 m，淡黄色荧光与蓝绿色荧光烃包裹体分布在方解石愈合缝，荧光，×20；e.3 043.6 m，沥青充填于岩石微裂缝中，透射光，×20；f.3 043.6 m，淡蓝色沥青充填于岩石微裂缝中，荧光，×20；g.3 043.6 m，方解石愈合缝里总有效网格数38个，含烃包裹体有效网格数10个，EGOI值为10/38=26.3%，透射光，×20；h.3 043.6 m，淡黄色荧光、蓝绿色荧光烃包裹体与沥青类包裹体沿方解石愈合缝分布，荧光，×20

Figure 8. Distribution of EGOI values of hydrocarbon inclusions in well Dagu 671 of Dawangzhuang buried hill zone in Jiyang Depression, Bohai Bay Basin

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图 9 渤海湾盆地济阳坳陷大王庄潜山带大古671井埋藏史与成藏期次划分

Figure 9. Buried history and accumulation periods of well Dagu 671 of Dawangzhuang buried hill zone in Jiyang Depression, Bohai Bay Basin

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图 10 渤海湾盆地济阳坳陷大王庄潜山带东营组沉积末期南北向古生界油气分布示意

Figure 10. Schematic diagram of Dongying stage of Paleozoic hydrocarbon distribution of Dawangzhuang buried hill zone in Jiyang Depression, Bohai Bay Basin

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图 11 渤海湾盆地济阳坳陷大王庄潜山带新构造运动期大古671井—大古39井剖面示踪

Figure 11. Tracing diagram of Dagu 671-Dagu 39 section in the neotectonism of Dawangzhuang buried hill zone in Jiyang Depression, Bohai Bay Basin

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表 1 渤海湾盆地济阳坳陷大王庄潜山带包裹体观测样品信息

Table 1. Data sheet of inclusion samples of Dawangzhuang buried hill zone in Jiyang Depression, Bohai Bay Basin

编号	井号	深度/m	层位	岩性描述
1	大古675	2 922.3	O₂ms	灰白色灰岩
2	大古675	3 147.6	O₂ms	灰色白云岩
3	大古675	3 403.4	O₂mx	深灰色灰岩
4	大古671	2 941.0	O₂ms	灰白色灰岩
5	大古671	2 969.0	O₂ms	深灰色灰岩
6	大古671	2 982.0	O₂ms	深灰色灰岩
7	大古671	3 000.8	O₂ms	深灰色泥晶灰岩
8	大古671	3 043.6	O₂ms	深灰色灰岩
9	大古671	3 087.6	O₂mx	深灰色灰岩
10	大古671	3 121.2	O₂mx	灰白色灰岩
11	大671	2 555.3	C-P	灰色细砂岩
12	大671	2 567.4	C-P	灰黄色粉细砂岩
13	大671	2 760.5	C-P	深灰色细砂岩
14	大671	2 794.2	C-P	深灰色细砂岩
15	大671	2 966.8	C-P	深灰色泥质粉砂岩
16	大671	2 970.2	C-P	深灰色含砾砂岩
17	大51	3 637.5	C-P	灰色泥质砂岩
18	大51	3 867.0	C-P	灰色细砂岩

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