| 渤海走滑转换带及其对大中型油气田形成的控制作用 |
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| 引用本文： | 徐长贵.渤海走滑转换带及其对大中型油气田形成的控制作用[J].地球科学,2016,41(9):1548-1560. |
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| 作者姓名： | 徐长贵 |
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| 作者单位： | 中海石油(中国)有限公司天津分公司渤海石油研究院，天津 300452 |
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| 基金项目： | 国家重大科技专项项目2011ZX05023-006 |
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| 摘 要： | 渤海海域郯庐走滑断裂带是重要的油气富集带，但是长期以来，该带对大中型油气田控制作用不明确.利用覆盖渤海郯庐断裂带的三维地震资料和400多口钻井资料对渤海海域走滑转换带特征及其与大中型油田形成关系进行了系统的分析.研究认为，新生代以来，渤海海域发育了多类型、多成因、多级次、多期次的走滑转换带；根据转换带在走滑断裂带中发育的位置，可以将渤海海域走滑转换带划分为断边转换带、断间转换、断梢转换带三大类，进一步根据断层的相互作用以及转换带的形态，可以将渤海海域转换带分为S型转换带、叠覆型转换带、双重型转换带、帚状转换带、叠瓦扇型转换带、共轭转换带以及复合转换带7种类型；根据局部应力状态可以分为增压型转换带和释压型转换带；根据转换带的规模，渤海海域走滑转换带可以分为一级转换带、二级转换带和三级转换带；增压型转换带控制了大型有效圈闭的发育、运移条件通畅等大中型油田基本成藏要素，进而控制了大中型油气田的分布.
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| 关 键 词： | 走滑断裂 增压型转换带 释压型转换带 大中型油田 渤海海域 石油地质 |
| 收稿时间： | 2016-02-16 |
Strike-Slip Transfer Zone and Its Control on Formation of Medium and Large-Sized Oilfields in Bohai Sea Area |
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| Abstract: | Tan-Lu strike-slip fault in Bohai sea area is an important hydrocarbon enrichment zone. But it is not clear whether strike-slip transfer zone controls on the formation of medium and large-sized oilfields. This paper systematically analyzes the Tan-Lu strike-slip transfer zone and its control on the development of medium and large-sized oilfields on the basis of detailed interpretation of 400 wells and 3-D seismic data over the fault zone. Three types of transfer zones developed in the Tan-Lu strike-slip fault zone are recognized according to the position of the transition zone in the strike-slip fault zone, which are named as fault-edge transfer zones, fault-overlap transfer zones and fault terminal transfer zones respectively. These transitions can be further divided into seven types, which are sigmoid, overlapping, duplex, broom-like, shingled, conjugated and compound types of transfer zones. According to the local stress state, each type of transfer zone is further subdivided into contractional and extensional types of transfer zones. Contractional transfer zones control the formation of large-scale traps, whereas extensional transfer zones control the formation of small-scale traps. Geological oil reserves related to contractional transfer zones account for up to 81% of total geological oil reserve of the Tan-Lu strike-slip fault zones. Therefore, contractional transfer zones developed in the strike-slip fault zones should serve as excellent exploration targets for the large-scale oilfield with great potential. |
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