| 辽河油田欧利坨子潜火山岩及其成藏机制 |
| |
| 引用本文： | 吴昌志,顾连兴,任作伟,赵明,张光辉.辽河油田欧利坨子潜火山岩及其成藏机制[J].地质论评,2003,49(2):162-167. |
| |
| 作者姓名： | 吴昌志 顾连兴 任作伟 赵明 张光辉 |
| |
| 作者单位： | 南京大学地球科学系,南京大学成矿作用国家重点实验室,210093 |
| |
| 摘 要： | 辽河油田欧利坨子油气的主要储集岩为侵位于沙三期烃源岩中的岩镰状潜火山侵入体。在岩浆侵位过程中，由于侵入体中挥发份的逸出并在岩体顶部聚集，于冷凝壳下发生“隐爆作用”，在冷凝壳内形成隐爆角砾岩砾间缝，在隐爆角砾岩附近震碎带形成网状型缝；由于岩浆上拱力，在岩体顶部冷凝壳内形成垂直向裂缝；岩体的冷凝收缩还形成了大量张性微裂缝。油气通过连通烃源岩与岩体的构造裂缝由下方烃源岩进入岩体上部裂隙系统，形成了工业型油气藏。
|
| 关 键 词： | 辽河油田 粗面斑岩 潜火山岩 储层 裂缝 形成机制 成藏机制 烃源岩 |
Subvolcanic Trachyte Porphyry at Oulituozi in the Liaohe Basin and Its Mechanism for Hydrocarbon Reservoir Formation |
| |
| WU Changzhi,GU Lianxing,REN Zuowei,ZHAO Ming,ZHANG Guanghui.Subvolcanic Trachyte Porphyry at Oulituozi in the Liaohe Basin and Its Mechanism for Hydrocarbon Reservoir Formation[J].Geological Review,2003,49(2):162-167. |
| |
| Authors: | WU Changzhi GU Lianxing REN Zuowei ZHAO Ming ZHANG Guanghui |
| |
| Institution: | WU Changzhi,GU Lianxing,REN Zuowei,ZHAO Ming,ZHANG Guanghui Department of Earth Sciences,State Key Laboratory for Mineral Deposit Research,Nanjing University |
| |
| Abstract: | Hydrocarbons in the Oulituozi oil-gas field, Liaohe Tertiary basin, Northeast China, are accumulated at the top of a subvolcanic trachyte porphyry. This porphyry was intruded in the Eocene Shahejie Formation, which is the principal hydrocarbon source of the region. Reservoir space is dominated by crypto-explosive breccias, crack networks, vertical open cracks, tensional microfissures and structural fractures. Crypto-explosive breccias and crack networks were produced by explosion of water and volatiles below a crystalline rind. Vertical open cracks were formed by the upwelling forces of magma from the depth. Tensional microfissures were produced by contraction of the crystallized magma on cooling. Structural fractures were created as a result of post-intrusion regional stress. In the surrounding rocks of the intrusion, there are numerous faults and fractures that connect the hydrocarbon sources to the fracture system of the trachyte porphyry. Hydrocarbons migrated to the present spaces after cooling of the intrusion. |
| |
| Keywords: | trachytic porphyry subvolcanic rocks oil and gas reservoir formation Liaohe basin |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地质论评》浏览原始摘要信息 |
| 点击此处可从《地质论评》下载免费的PDF全文 |
|
