| 准噶尔盆地流体输导格架及其对油气成藏与分布的控制 |
| |
| 引用本文： | 邹华耀,郝芳,张柏桥,陈建平.准噶尔盆地流体输导格架及其对油气成藏与分布的控制[J].地球科学,2005,30(5):609-616. |
| |
| 作者姓名： | 邹华耀 郝芳 张柏桥 陈建平 |
| |
| 作者单位： | 1.中国石油大学油气成藏机理教育部重点实验室, 北京 102249 |
| |
| 基金项目： | 教育部科学技术研究项目;中国石油天然气集团公司资助项目 |
| |
| 摘 要： | 准噶尔盆地是一个大型叠合盆地, 不同构造单元具有不同的演化历史、流体动力学环境、流体输导格架和油气充注历史.盆地西北缘处于正常压力环境, 发育自源岩至圈闭的断裂-不整合面贯通型流体输导格架, 主要油气聚集期为三叠纪-侏罗纪.由于高效流体输导网络的发育, 西北缘油气聚集期与主力源岩生排烃期一致, 是该盆地油气最为富集的区域.盆地中部断裂密度低, 深、浅部断层被三叠系白碱滩组区域封闭层分隔, 在超压发育前和超压积蓄期为双断分隔型流体输导格架, 超压的发育导致地层发生水力破裂和封闭性断层的开启, 从而形成断裂-水力破裂连通型流体输导格架, 构成流体和二叠系源岩生成油气的穿层运移通道.由于地层水力破裂及其控制的断裂-水力破裂连通型流体输导格架的形成晚于主力源岩的主生油期, 盆地中部油气的主要聚集期晚于主力源岩的主生油期, 且原油的成熟度较高.研究证明, 输导格架控制区域性流体动力学环境、油气优势运移通道、油气的充注层位和充注历史.
|
| 关 键 词： | 流体输导格架 超压 水力破裂 流体运移 成藏历史 准噶尔盆地 |
| 文章编号： | 1000-2383（2005）05-0609-08 |
| 收稿时间： | 05 3 2005 12:00AM |
| 修稿时间： | 2005-05-03 |
Fluid-Conduit Framework and Its Control on Petroleum Accumulation in the Junggar Basin |
| |
| ZOU Hua-yao,HAO Fang,ZHANG Bai-qiao,CHEN Jian-ping.Fluid-Conduit Framework and Its Control on Petroleum Accumulation in the Junggar Basin[J].Earth Science-Journal of China University of Geosciences,2005,30(5):609-616. |
| |
| Authors: | ZOU Hua-yao HAO Fang ZHANG Bai-qiao CHEN Jian-ping |
| |
| Abstract: | The Junggar basin is a huge, multiple-stage basin in Northwest China. Different structural units of this basin have quite different evolution histories, fluid-flow environments, fluid-conduit frameworks and petroleum accumulation histories. The northwest margin of the Junggar basin is in a normally pressured environment with a fault-unconformity conduit framework connecting source rocks and traps effectively. Due to the effectiveness of the fluid-conduit framework in this region, the major petroleum accumulation occurred almost at the same time as the main phase of oil generation. Very few faults developed in the center part of the Junggar basin, and faults in the shallow section could not connect with faults in the deeper section. As a result, petroleum generated in the Permian source rocks could not have migrated vertically into the overlying Jurassic reservoir rocks during the peak petroleum generation stage (Triassic to Jurassic) until the Cretaceous, when fracturing caused by overpressure occurred and the Jurassic reservoir rocks were connected with the Permian source rock by faults and hydraulic fractures. Because the fault-hydraulic fracturing and the resultant fault-fracture conduit framework developed a relatively long time after peak oil generation, the major petroleum accumulation came later than peak oil generation, and the accumulated oil had a relatively high maturity. This study confirms that in an overpressured environment the fluid-conduit framework is dynamic, and has a controlling effect on the petroleum migration pathway and accumulation intervals, as well as the injection histories. |
| |
| Keywords: | fluid conduit framework overpressure hydraulic fracture fluid migration injection history Junggar 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《地球科学》浏览原始摘要信息 |
| 点击此处可从《地球科学》下载免费的PDF全文 |
|
