东营凹陷民丰断裂带断层活动与油气成藏

李虹霖; 蒋有录; 郭富欣; 路智勇; 崔小君

东营凹陷民丰断裂带断层活动与油气成藏

1.
中国石油大学(华东)地球科学与技术学院, 山东青岛 266580
2.
中国石化胜利油田分公司东辛采油厂, 山东东营 257068

基金项目:

国家重大专项 2011ZX05006-003

国家自然科学基金项目 41372132

详细信息

作者简介:
李虹霖(1989-), 男, 硕士研究生, 油气地质与勘探研究方向。E-mail:991921285@qq.com

中图分类号: TE121.2
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- 被引次数: 0
出版历程
- 收稿日期: 2015-04-12
- 刊出日期: 2015-12-28

RELATIONSHIP BETWEEN FAULT-ACTIVITY AND HYDROCARBON ACCUMULATION IN MINFENG FAULT ZONE OF DONGYING SAG

1.
School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China
2.
Dongxin Production Plant, SINOPEC Shengli Oilfield Company, Dongying 257068, Shandong, China

摘要

摘要: 基于三维地震、测井和录井等资料, 采用断层生长指数法, 结合油气成藏史研究, 分析了东营凹陷民丰断裂带的断层活动特征, 并探讨了断层活动与油气成藏的关系。研究结果表明, 研究区断层活动具有持续性和继承性, 呈现出2个活动高峰期, 即沙三上亚段和东营组沉积时期。不同断层以及同一断层不同部位活动性存在明显差异。10号断层规模较大, 活动性最强, 为该区最重要的油源断层, 断层活动强度自西向东呈现强-弱-强的变化规律, 断层活动与烃源岩主生排烃期匹配关系较好, 为油气成藏提供了良好的垂向运移条件; 而其余1-9号断层为发育在10号断层下降盘的次级调节断层, 活动性弱, 与成藏期匹配较差, 不利于油气成藏。
- 断层活动 /
- 油气成藏 /
- 民丰断裂带 /
- 东营凹陷
Abstract: Based on integration of 3D seismic, drilling and logging data and in combination with the history of hydrocarbon accumulation, we analyzed the features of faults activity by fault growth index and discussed the relationship between fault activity and hydrocarbon accumulation.The result shows that faults have sustaining and successive characterization, and there are two activity peak periods:one occurred in the later Es₃ period and the other occurred in Ed period. There exist obvious differences in different faults and different locations of the same fault. The No.10 fault is the most important oil source fault which is larger in scale and the fault activity is the strongest in regular change pattern of "strong-weak-strong" from west to east. And the activity period of No.10 fault is matched with the main hydrocarbon expelling period of source rocks, which provide good conditions for vertical oil migration; While other faults are the secondary adjusting faults which develope in the thrown wall of No.10 fault, they are not conducive to the accumulation of hydrocarbon because their fault activities are weak and in poor matching with the main hydrocarbon expelling period.
- fault activity /
- hydrocarbon accumulation /
- Minfeng fault zone /
- Dongying sag

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图 1 民丰断裂带构造位置及断层展布

Figure 1. Tectonic settings and faults distribution of Minfeng fault zone

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图 2 民丰断裂带地震剖面图(据剖面③)

Figure 2. Seismic profile of Minfeng fault zone

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图 3 不同断层各时期断层生长指数

Figure 3. Fault growth index of different faults in different sedimentary period

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图 4 10号断层不同位置断层生长指数图(剖面位置见图 1)

Figure 4. Fault growth index in different locations of No.10 fault

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图 5 民丰断裂带断层活动与成藏期匹配关系

Figure 5. The matching relation between fault activities and hydrocarbon accumulation stages in Minfeng fault zone

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表 1 民丰断裂带断层要素

Table 1. Elements of fault in Minfeng fault zone

断层名称	走向	倾向	最大延伸距离/km	活动时期	断距/m	断裂级别
断层1	北西西	南倾	7.3	Es₃^下—Ng	20~55	Ⅳ
断层2	北西西	南倾	5.3	Es₃^下—Ng	25~55	Ⅳ
断层3	北西西	南倾	5.6	Es₃^下—Ng	20~95	Ⅳ
断层4	北西西	南倾	2.5	Es₃^下—Ed	30~75	Ⅳ
断层5	北西西	南倾	6.2	Es₃^下—Ng	45~60	Ⅳ
断层6	北西西	南倾	4.6	Es₃^中—Ed	70~75	Ⅳ
断层7	北西西	南倾	6.4	Es₃^中—Ed	30~35	Ⅳ
断层8	北西西	南倾	4.8	Es₃^中—Ng	25~40	Ⅳ
断层9	北西西	南倾	2.2	Es₃^上—Ed	20~25	Ⅳ
断层10	北西西	北倾	9.5	Es₄^上—Nm	80~120	Ⅲ

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