| 储层致密化与油气充注的关系:以三肇凹陷白垩系扶余油层为例 |
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| 引用本文： | 斯尚华,胡张明,刘吉,刘云飞,耳闯,杨哲恒,何俊昊.储层致密化与油气充注的关系:以三肇凹陷白垩系扶余油层为例[J].现代地质,2021,35(6):1854-1863. |
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| 作者姓名： | 斯尚华 胡张明 刘吉 刘云飞 耳闯 杨哲恒 何俊昊 |
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| 作者单位： | 1.西安石油大学 地球科学与工程学院,陕西 西安 7100652.西部钻探工程有限公司地质研究院,新疆 克拉玛依 8340993.中国石油集团测井有限公司辽河分公司,辽宁 盘锦 1240014.长庆油田第五采油厂,陕西 西安 710200 |
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| 基金项目： | 国家自然科学基金项目“松辽盆地三肇凹陷扶余油层方解石胶结物形成机制及其与烃类充注的耦合关系”(41702132);陕西省自然科学基础研究计划项目“致密油气运移特征精细研究”(2019JM-055) |
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| 摘 要： | 为了明确松辽盆地三肇凹陷扶余油层储层致密化与油气充注相关性,利用微米CT、流体包裹体显微分析、盆地模拟等方法,研究了该储层微观孔喉特征,且定量分析了其成藏期。根据储层孔隙演化信息分析了研究区储层致密化过程和油气成藏的关系。结果发现:三肇凹陷扶余致密储层岩石类型以长石岩屑砂岩和岩屑长石砂岩为主,孔喉特征表现为窄喉道、宽孔隙、孔喉配置差、微细喉道总体积大等特征。压实作用和胶结作用为储层致密化重要成因,储层致密时间应该在嫩江组末之前。流体包裹体分析结果表明三肇凹陷扶余储层油充注分为早期和晚期,相应的充注时间分别距今77~74 Ma、67~65 Ma,分别对应于嫩江组沉积期和明水组沉积末期。综合对比扶余油层油气成藏历史和储层孔隙演化特征,认为原油充注发生储层致密化之后,即先致密后成藏。
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| 关 键 词： | 储层致密化 油气成藏 形成时期 扶余油层 三肇凹陷 |
| 收稿时间： | 2021-02-17 |
| 修稿时间： | 2021-04-10 |
Relationship Between Reservoir Densification and Hydrocarbon Charging: A Case Study of Cretaceous Fuyu Reservoir of the Sanzhao Sag |
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| SI Shanghua,HU Zhangming,LIU Ji,LIU Yunfei,ER Chuang,YANG Zheheng,HE Junhao.Relationship Between Reservoir Densification and Hydrocarbon Charging: A Case Study of Cretaceous Fuyu Reservoir of the Sanzhao Sag[J].Geoscience——Journal of Graduate School,China University of Geosciences,2021,35(6):1854-1863. |
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| Authors: | SI Shanghua HU Zhangming LIU Ji LIU Yunfei ER Chuang YANG Zheheng HE Junhao |
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| Institution: | 1. School of Earth Sciences and Engineering,Xi'an Shiyou University, Xi'an,Shaanxi 710065,China2. Geological Research Institute of Western Drilling Engineering Co., Ltd, Kelamayi,Xinjiang 834099,China3. Liaohe Branch of CNPC Logging Co., Ltd, Panjing,Liaoning 124001,China4. The Fifth Oil Production Plant of Changqing Oilfield, Xi'an,Shaanxi 710200,China |
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| Abstract: | To clarify the correlation between reservoir densification and hydrocarbon charging in the Fuyu reservoir of the Sanzhao sag (Songliao Basin), the micro-pore/-throat characteristics of the reservoir were studied with micro-CT, fluid inclusion micro-analysis and basin simulation, and the accumulation period was quantitatively analyzed. According to the reservoir pore evolution, the relation between reservoir densification and hydrocarbon accumulation is analyzed. The results show that the Fuyu tight reservoir in Sanzhao sag contains mainly feldspathic lithic sandstone and lithic arkose, and the pore throat is featured by narrow throat, wide pore, poor configuration, and large total volume. Compaction and cementation are important for reservoir densification, and the compaction likely occurred before the end of Nenjiang Formation deposition. Fluid inclusion analysis results show that oil charging in the Fuyu reservoir can be divided into an early and late stage, with corresponding charging time of 77 to 74 Ma and 67 to 65 Ma, respectively, corresponding to the sedimentary period of Nenjiang Formation and the end of Mingshui Formation. Comprehensive comparison of hydrocarbon accumulation history and reservoir pore evolution characteristics of the Fuyu oil layer suggest that after reservoir densification occurred during the oil charging, the reservoir was first compacted and then generated. |
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| Keywords: | reservoir densification hydrocarbon accumulation formation period Fuyu reservoir Sanzhao sag |
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