高邮凹陷汉留1号断层输导通道的时空分布特征

doi:10.19657/j.geoscience.1000-8527.2022.225

现代地质 ›› 2022, Vol. 36 ›› Issue (06): 1574-1584.DOI: 10.19657/j.geoscience.1000-8527.2022.225

高邮凹陷汉留1号断层输导通道的时空分布特征

陈星岳¹^,²(), 李鹤永³, 孙思敏¹^,², 操义军¹^,², 徐哲航¹^,², 邹华耀¹^,²()

1.中国石油大学(北京) 地球科学学院,北京 102249
2.中国石油大学(北京) 油气资源与探测国家重点实验室,北京 102249
3.中国石化江苏油田分公司勘探开发研究院,江苏扬州 225009

收稿日期:2022-09-10 修回日期:2022-10-20 出版日期:2022-12-10 发布日期:2023-01-11
通讯作者: 邹华耀
作者简介:邹华耀,男,教授,博士生导师,1963年出生,石油地质学专业,从事油气运聚机理及富集规律研究。Email:huayaozou@cup.edu.cn。
陈星岳,男,硕士研究生,1998年出生,地质资源与地质工程专业,从事油气运聚机理及富集规律研究。Email:348350663@qq.com。
基金资助:
国家科技重大专项(2016ZX05024-003-008)

Characteristics of Temporal-spatial Distribution of Fault Conduit for Hydrocarbon Migration within the Hanliu-1 Fault in Gaoyou Sag

CHEN Xingyue¹^,²(), LI Heyong³, SUN Simin¹^,², CAO Yijun¹^,², XU Zhehang¹^,², ZOU Huayao¹^,²()

1. College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China
2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249,China
3. Exploration and Development Research Institute of Jiangsu Oilfield Company, SINOPEC, Yangzhou,Jiangsu 225009, China

Received:2022-09-10 Revised:2022-10-20 Online:2022-12-10 Published:2023-01-11
Contact: ZOU Huayao

摘要/Abstract

摘要：

汉留1号断层是苏北盆地高邮凹陷深凹带北侧边界断层。为了明确该断层输导通道的时间与空间分布特征,通过断层面几何形态、关键时期断层活动速率计算,阐释了汉留1号断层在两个油气主运移时期的输导能力,判识了输导通道的空间位置。研究表明,汉留1号断层在三垛组沉积期活动速率>25 m/Ma,断层开启具有输导能力,另一方面,汉留1号断层的断层面存在3个明显的凸面和2个凹面区域,因此,在该沉积期该断层在3个凸面区域发育3条输导通道。而在随后的盐城组至今的沉积期,断层活动强度减弱,活动速率<10 m/Ma,输导能力弱,垂向上主要起封闭作用。因此,空间上断层通道发育于断层面凸面位置;时间上,断层活动速率>25 m/Ma时通道开启,<10 m/Ma时通道关闭。就聚集而言,断层通道开启时油气沿断层向上运移聚集于上部滚动背斜圈闭中,闭合时聚集于下部断层圈闭中。

关键词: 断层输导通道, 断层活动速率, 断层面几何形态, 汉留1号断层, 高邮凹陷

Abstract:

The Hanliu-1 fault is located on the northern border of deeply subsided area in Gaoyou sag, Subei Basin. In order to distinguish the temporal-spatial distribution of the fault conduit, fault activity rate (FAR), fault-plane geometry of the Hanliu-1 fault have been carried out for the two crucial periods of hydrocarbon migration. It is indicated that the Hanliu-1 fault was intensively active with FAR >25 m/Ma and its fault-plane geometry was featured with three obvious convex and two concave fault components during the deposition of the Sanduo Formation. Therefore, the Hanliu-1 fault was opening and three conduits occurred along the three convex fault components during this period. Since the deposition of the Yancheng Formation, the fault activity has decreased in FAR <10 m/Ma and the fault conduits have been getting closing. In conclusion, spatially, the fault conduit often occurs along convex fault component, and temporally, the fault conduit was opening as FAR >25 m/Ma and closing as FAR <10 m/Ma. As to hydrocarbon accumulation in Gaoyou sag, when the fault conduit was opening, oil migrated upwards to fill the roll-over anticline trap, and when closing, oil expelled from source rock charged immediately into the fault trap without vertical migration along the fault.

Key words: fault conduit, fault activity rate, fault-plane geometry, Hanliu-1 fault, Gaoyou sag

中图分类号:

TE122.1

陈星岳, 李鹤永, 孙思敏, 操义军, 徐哲航, 邹华耀. 高邮凹陷汉留1号断层输导通道的时空分布特征[J]. 现代地质, 2022, 36(06): 1574-1584.

CHEN Xingyue, LI Heyong, SUN Simin, CAO Yijun, XU Zhehang, ZOU Huayao. Characteristics of Temporal-spatial Distribution of Fault Conduit for Hydrocarbon Migration within the Hanliu-1 Fault in Gaoyou Sag[J]. Geoscience, 2022, 36(06): 1574-1584.

图/表 8

图1 研究区范围、构造单元划分及综合柱状图

Fig.1 Location, structural units and stratigraphic column of the study area

图2 Z86井地层埋藏史、热史与阜四段烃源岩生烃史图

Fig.2 Burial history, thermal evolution and hydrocarbon-generating history of fourth Funing member of Z86 well

图3 高邮凹陷过LX38井C—C'地震反射特征及构造演化剖面(剖面位置见图1) (a)现今过LX38井C—C'时间域地震反射剖面;(b)现今过LX38井C—C'构造剖面;(c)三垛组沉积末期过LX38井C—C'构造剖面

Fig.3 Seismic reflection characteristics and tectonic evolution sections of the C-C' profile of Gaoyou sag across LX38 well(section location is shown in the Fig.1)

图4 三垛组沉积末期汉留1号断层A—B区段断层面几何形态与流体沿断层运移模式示意图(剖面位置见图1)

Fig.4 Fault geometry and fluid migration model along the fault plane of A-B area, Hanliu-1 fault (section location is shown in the Fig.1)

图5 不同时期汉留1号断层A—B区段活动速率(剖面位置见图1)

Fig.5 Fault activity rate at different periods of A-B area, Hanliu-1 fault (section location is shown in the Fig.1)

图6 流体沿断层带排驱过程示意图(据Hooper[11],1991;郝芳等[9]有修改)

Fig.6 Process of fluid displacement along the fault zones (modified from Hooper[11], and Hao et al[9].)

图7 联盟庄油田三垛组沉积期(50.5~38 Ma)汉留1号断层活动速率与输导作用及油气成藏模式图(剖面位置见图1)

Fig.7 Fault activity rate, migration capacity and hydrocarbon accumulation model of Lianmengzhuang oilfield during the deposition of Sanduo Formation (50.5-38 Ma) (section location is shown in the Fig.1)

图8 联盟庄油田盐城组沉积期至今(24.6~0 Ma)汉留1号断层活动速率与垂向遮挡作用及油气成藏模式图(剖面位置见图1)

Fig.8 Fault activity rate, migration capacity, and hydrocarbon accumulation model of Lianmengzhuang oilfield during the deposition of Yancheng Formation to the present (24.6 Ma to the present) (section location is shown in the Fig.1)

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高邮凹陷汉留1号断层输导通道的时空分布特征

Characteristics of Temporal-spatial Distribution of Fault Conduit for Hydrocarbon Migration within the Hanliu-1 Fault in Gaoyou Sag

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