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| 准噶尔盆地南缘东段侏罗系—白垩系物源及其演化特征 | |
| 引用本文： | 王柯,高崇龙,王剑,刘明,罗正江,陈海峰,刘可,任影,邓毅.准噶尔盆地南缘东段侏罗系—白垩系物源及其演化特征[J].吉林大学学报(地球科学版),2022,52(2):328-347. |
| 作者姓名： | 王柯 高崇龙 王剑 刘明 罗正江 陈海峰 刘可 任影 邓毅 |
| 作者单位： | 1.东北石油大学地球科学学院，黑龙江大庆163318 2.东北石油大学非常规油气研究院，黑龙江大庆163318 3.中国石油新疆油田公司实验检测研究院，新疆克拉玛依834000 |
| 基金项目： | 国家自然科学基金项目（41902118）；黑龙江省博士后基金项目（LBH-Z20045） |
| 摘 要： | 准噶尔盆地南缘东段侏罗系—白垩系储层油气勘探潜力巨大，但关于其物源条件及沉积背景演化方面的认识较为有限，严重制约了后续油气勘探开发进程。为顺利开展后续油气勘探，笔者应用砂岩碎屑成分、砾岩砾石成分、重矿物类型及组合特征、古水流特征、地层岩性比例特征等物源分析方法，并结合区域构造演化背景，对准噶尔盆地南缘东段侏罗系—白垩系沉积物源特征进行厘定，并恢复其演化过程。研究结果表明：早侏罗世，博格达山尚未隆升，准南东段物源体系受控于北部克拉美丽山及南部天山山体，研究区南部原始沉积边界距现今盆地边界最远；自中侏罗世以来，由于受周缘山体隆升及燕山运动影响，博格达山开始隆升并逐渐出露水面，对准南东段物源体系产生一定影响；自晚侏罗世—早白垩世，博格达山的持续隆升作用使其隆起高度和规模不断增大，并最终成为准南东段优势物源区，克拉美丽山隆起幅度也不断增大，而使其供源能力增强。整体上，早侏罗世—中侏罗世，准南东段受南部天山物源体系和北部克拉美丽山物源体系共同影响；而在中侏罗世—早白垩世这一沉积期，南部天山物源体系、北部克拉美丽山物源体系和博格达山物源体系并存，但各物源体系对准南东段侏罗系—白垩系影响程度存在差异。 |
| 关 键 词： | 准噶尔盆地南缘 侏罗系—白垩系 物源体系 演化特征 |
| 收稿时间： | 2021-04-07 |
Provenance and Evolution Characteristics of Jurassic-Cretaceous in Eastern Part of the Southern Margin of Junggar Basin |
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| Wang Ke,Gao Chonglong,Wang Jian,Liu Ming,Luo Zhengjiang,Cheng Haifeng,Liu Ke,Ren Ying,Deng Yi.Provenance and Evolution Characteristics of Jurassic-Cretaceous in Eastern Part of the Southern Margin of Junggar Basin[J].Journal of Jilin Unviersity:Earth Science Edition,2022,52(2):328-347. | |
| Authors: | Wang Ke Gao Chonglong Wang Jian Liu Ming Luo Zhengjiang Cheng Haifeng Liu Ke Ren Ying Deng Yi |
| Institution: | 1.College of Geosciences, Northeast Petroleum University, Daqing163318, Heilongjiang, China 2. Institute of Unconventional Oil & Gas, Northeast Petroleum University, Daqing 163318, Heilongjiang, China 3. Research Institute of Experiment and Detection, Xinjiang Oilfield Company, PetroChina, Karamay 834000, Xinjiang, China |
| Abstract: | The oil and gas exploration potential of the Jurassic-Cretaceous reservoirs in eastern part of the southern margin of Junggar basin is huge, but the limited understanding of its provenance conditions and sedimentary background evolution seriously restricts the subsequent oil and gas exploration and development. In this study, the source characteristics of the Jurassic-Cretaceous sediments in eastern part of the southern margin of Junggar basin are determined and the evolution process is restored through the analyses of sandstone clastic composition, conglomerate gravel composition, heavy mineral type and combination, paleocurrent characteristics, and stratigraphic lithology proportion, and the evolution process is restored combined with the regional tectonic evolution background: Olutio the Bogda Mountains did not uplift in the Early Jurassic, and the provenance system of the quasi-southeast segment was controlled by the northern Kelamey Mountains and the southern Tianshan Mountains；The original sedimentary boundary in the southern part of the study area is far away from the current basin boundary. In the Middle Jurassic, due to the uplift of the surrounding mountains and the influence of Yanshan movement, the Bogda Mountains began to uplift and gradually exposed to the surface, which had a certain impact on the provenance system of the southeast section, however, from the Late Jurassic to the Early Cretaceous, the Bogda Mountains continued to uplift and eventually became the dominant source area in the southeast；At the same time, the uplift of Kelamey Mountains increased from the Late Jurassic to the Early Cretaceous, which enhanced its supply capacity. On the whole, from the Early Jurassic to the Middle Jurassic, the quasi-southeast segment was jointly affected by the southern Tianshan provenance system and the northern Kelamey provenance system. During these dimentary period of the Middle Jurassic-Early Cretaceous, the southern Tianshan provenance system, the northern Kelamey provenance system and the Bogda provenance system coexisted, however， their influence on the Jurassic-Cretaceous system in the southeast segment is different. |
| Keywords: | southern margin of Junggar basin Jurassic-Cretaceous provenance system evolution characteristics |
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