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| 四川盆地基底断裂对长兴组生物礁的控制作用研究 | |
| 引用本文： | 谭秀成,罗冰,江兴福,刘宏,李凌,张本健,邹娟,赵长城.四川盆地基底断裂对长兴组生物礁的控制作用研究[J].地质论评,2012,58(2):277-284. |
| 作者姓名： | 谭秀成 罗冰 江兴福 刘宏 李凌 张本健 邹娟 赵长城 |
| 作者单位： | 1. 油气藏地质及开发工程国家重点实验室,西南石油大学,成都,610500;西南石油大学资源与环境学院,成都,610500 2. 中国石油西南油气田分公司勘探开发研究院,成都,610051 3. 中国石油西南油气田分公司勘探事业部,成都,610051 4. 西南石油大学资源与环境学院,成都,610500 5. 中国石油西南油气田分公司川西北气矿,四川江油,621700 6. 中国石油川庆钻探工程有限公司地质勘探开发研究院,成都,610051 |
| 基金项目： | 本文为国家重点基础研究发展项目（“973”计划）（编号 2012CB214803）和中国石油科技创新基金研究项目 (编号 2011D50060105)的成果。 |
| 摘 要： | 四川盆地长兴组生物礁油气藏是国内外该类型油气藏的一个典型代表。在前人主要针对川东北地区提出台地边缘是生物礁发育有利部位的基础上,从盆地更广的尺度,结合国内外已有实例,着重从基底断裂角度,分析了其对生物礁发育的影响与控制作用。结果表明,盆地内长兴组发育有大量NE和NW向深大断裂,地层、岩相和构造证据均反映这些断裂在晚二叠世处于正断活动期,并形成了台—槽相间和台内棋盘格状堑垒构造格局。基底正断活动通过对古地理的影响来实现对生物礁的控制,生物礁受张性正断层上升盘"断隆"控制,分布于基底断裂古上升盘断阶处,如环海槽的台地边缘和台地内部断垒周缘。因此,除已获得重大突破的"环海槽礁滩气藏富气带"外,在台地内部靠基底断裂带附近,礁滩也可能发育,可作为今后油气勘探重点考虑的对象。这一研究新认识有助于拓展区域油气勘探思路,并为生物礁型油气成藏理论研究提供新的参考信息。 |
| 关 键 词： | 生物礁 基底断裂 古地理 长兴组 四川盆地 |
Controlling Effect of Basement Fault on Changxing Formation Reef in Sichuan Basin |
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| TAN Xiucheng , LUO Bing , JIANG Xingfu , LIU Hong , LI Ling , ZHANG Benjian , ZOU Juan , ZHAO Changcheng.Controlling Effect of Basement Fault on Changxing Formation Reef in Sichuan Basin[J].Geological Review,2012,58(2):277-284. | |
| Authors: | TAN Xiucheng LUO Bing JIANG Xingfu LIU Hong LI Ling ZHANG Benjian ZOU Juan ZHAO Changcheng |
| Institution: | 1)State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University, Chengdu, 610500; 2)School of Resource and Environment, Southwest Petroleum University, Chengdu, 610500; 3) Geological Exploration and Development Research Institute, PetroChina Southwest Oil and Gas Field Company, Chengdu, 610500; 4)Exploitation Department, PetroChina Southwest Oil & Gas Field Company, Chengdu, 610051; 5)Northwest Sichuan Gas Field, PetroChina Southwest Oil & Gas Field Company, Jiangyou, Sichuan, 621700; 6) Geological Exploration and Development Research Institute, Chuanqing Drilling Engineering Company Limited Co., Ltd., CNPC, Chengdu, 610051 |
| Abstract: | The Changxing Formation reef in the Sichuan Basin is a representative of the reef reservoirs in China and the world. It has been suggested that the platform margins are favorable for the reef development mainly based on case studies in the northeastern Sichuan Basin. In this paper, writers carried out a relatively comprehensive analysis by viewing the whole basin, with emphasis on the influence and controlling of basement faults on the reef distribution and development. It is indicated that abundant deep and large NE- and NW-trending basement faults were developed during the Late Permian Changxing period. The activity of the faults is supported by stratigraphic, lithofacies and tectonic evidences. As a consequence, a depositional framework characterized by alternative uplifts and depressions was formed, and in turn decided the occurrence and developing scale of the reefs. Being controlled by the hanging-wall block of the normal faults, the reefs dominantly occurred in the fault step areas of the paleo hanging wall, e.g., the platform margin areas surrounding the marine trough and the fault highs inside the platform. Therefore, the reefs can develop adjacent to the basement faults inside the platform, besides the platform margins as previously suggested. This can be favorable and key targets for further hydrocarbon exploration. This new understanding can help to broaden the regional petroleum exploration strategy, and can provide new information for theoretical study of the reef hydrocarbon accumulation. |
| Keywords: | reef basement fault paleogeography Changxing Formation Sichuan Basin |
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