渤海湾盆地东营凹陷辛东地区构造演化及油气成藏规律

韩清华; 兖鹏; 余朝华; 吴时国

渤海湾盆地东营凹陷辛东地区构造演化及油气成藏规律

韩清华^{1, 4},
兖鹏²,
余朝华³,
吴时国^{1, 4}

1.
中国科学院海洋研究所海洋地质与环境重点实验室, 山东青岛 266071
2.
中国石油大学(华东)地球资源与信息学院, 山东东营 257061
3.
中国石油天然气勘探开发公司海外研究中心, 北京 100083
4.
中国科学院研究生院, 北京 100049

基金项目:

中国科学院创新工程项目 KZCW3-SW-219

中国科学院创新工程项目 KZCW3-SW-224

详细信息

作者简介:
韩清华(1966-), 男, 高级工程师, 中国科学院海洋研究所在读博士生

中图分类号: P618.130.2
计量
- 文章访问数: 273
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- 被引次数: 0
出版历程
- 收稿日期: 2008-03-19
- 刊出日期: 2008-12-01

STRUCTURAL EVOLUTION AND HYDROCARBON ACCUMULATION IN THE XINDONG AREA OF DONGYING SAG, BOHAI BAY BASIN

1.
Key Lab of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2.
College of Geo-Resource and Information, China University of Petroleum (Huadong), Dongying 257061, China
3.
CNPC International Research Center, Beijing 100083, China
4.
Graduate School of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 辛东地区位于多个构造带的结合部, 构造复杂, 其中辛镇构造是研究区内的主要构造带。区内断层活动表现出明显的生长性和继承性, 沙三上段到沙二段(Es_3上-Es₂)沉积时期和东营组(Ed)沉积时期是断层发育的全盛期。根据4116测线平衡剖面的演化史分析, 辛东地区新生代构造演化主要经历了沙三段(Es₃)沉积前的雏形阶段、沙三段—东营组(Es₃-Ed)沉积时期的定型阶段和馆陶组-现今(Ng-现今)的衰退阶段三个时期。研究区内的油源主要来自于邻近的民丰洼陷和牛庄洼陷。油气成藏期次基本分为东营期和馆陶末~明化镇期, 且以晚期成藏为主。生成的油气首先就近运移, 在深部沙四段(Es₄)、沙三中下段(Es_3中下-Es₂)发育的岩性圈闭中聚集成藏; 其次, 通过大规模联通的储集体和活动性断层向本区运移, 在靠近洼陷的构造翼部和核部的古近系断块区富集起来; 此后, 由于长期发育的活动性断层的存在, 已形成油气藏的平衡条件被改变, 部分油气随着活动性断层继续向上运移在浅部新近系中形成次生油气藏。
- 构造演化 /
- 平衡剖面 /
- 油气成藏
Abstract: The Xindong area is located at the conjunction of several structural belts, among which the Xinzhen structure constitutes the principal structural belt of the research area.The faults of the area display obvious growth and succession, and reached the acme in their development during the deposition of Es₃-Es₂ and Ed.Based on the analysis on balanced cross-section evolution of 4116 survey line, the Cenozoic tectonic evolution of this research area could be divided into three stages :pre-Es₃ embryonic stage, Es₃-Ed shaping stage, and Ng-present decline stage.The oil resource of this area mainly came from the nearby Minfeng and Niuzhuang sags.Ed and Ng-Nm are two oil and gas reservoir forming phases, and the latter is the main one.The generated oil and gas migrated laterally in the vicinity and accumulated in deep trap consisting of Es₄ and Es₁^1-2x-Es₂; then, the oil and gas continued to migrate through large-scale accumulation body and active faults to the research area and concentrated in the Paleogene fault blocks involved in wing and core parts of structures near sags.Long-term development of active faults led to the change in condition for formation of oil and gas, so part of the generated oil and gas migrated upward along the active faults and formed secondary hydrocarbon reservoir in the Neogene beds.
- tectonic evolution /
- balanced cross-section /
- oil & gas accumulation mechanism

HTML全文

图 1 辛东地区构造位置图 (方框表示图 2的位置, 角图表示东营凹陷)

Figure 1. A sketch showing structural location of Xindong area

(The square frame indicates position of Fig. 2, and the insert the Dongying Sag)

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图 2 辛东地区T4、T6x、T7构造图

Figure 2. Structural diagrams for T4、T6x and T7 of Xindong area

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图 3 AA′永安镇构造带南北向地震剖面; BB′辛镇地区南北向地震剖面; CC′广利地区东西向地震剖面

Figure 3. AA′, N-S seismic profile in Yonganzhen structural belt; BB′, N-S seismic profile in Xinzhen area; CC′, E-W seismic profile in Guangli area

下载: 全尺寸图片幻灯片

图 4 各区主干断裂生长指数直方图

Figure 4. Histogram of growth index of master fractures in different areas

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图 5 辛东地区南北向4116测线构造演化史剖面图

Figure 5. Profile of structural evolution of the N-S 4116 survey line in Xindong area

下载: 全尺寸图片幻灯片

图 6 东营凹陷主力烃源岩不同时期累积生、排烃量直方图

Figure 6. Histogram diagram of accumulative hydrocarbon-generation and hydrocarbon-expulsion of leading source rocks in different times in Dongying sag

下载: 全尺寸图片幻灯片

图 7 辛东地区“屋脊式断块油气藏”剖面示意图^[21]

Figure 7. The profile of fastigium-faulted reservoir in Xindong area^[21]

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图 8 辛东地区“砂岩透镜体油气藏”剖面示意图^[22]

Figure 8. The profile of lens-type sandstone reservoir in Xindong area^[22]

下载: 全尺寸图片幻灯片

图 9 辛东地区油气成藏模式图(位置见图 1DD′)

Figure 9. The reservoir model of Xindong area

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表 1 辛镇、广利、永安镇构造带主干断裂各期断层生长指数统计表

Table 1. Statistics of growth index of different-time faults in master fracture

表 2 辛东地区南北向4116测线剖面伸展量和伸展率统计表

Table 2. Statistics of tensor and the extension rate of N-S 4116 survey line profile in Xindong area

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