| 泌阳凹陷北部缓坡带核桃园组油气运聚成藏过程 |
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| 引用本文： | 张鑫,陈红汉,龙昭,刘强.泌阳凹陷北部缓坡带核桃园组油气运聚成藏过程[J].地质科技通报,2020,39(3):140-149. |
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| 作者姓名： | 张鑫 陈红汉 龙昭 刘强 |
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| 作者单位： | 中国地质大学（武汉）构造与油气资源教育部重点实验室;中国石油集团东方地球物理勘探责任有限公司研究院 |
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| 基金项目： | 国家重点自然科学基金项目41730421中国石油化工股份有限公司"十三五"重大科技专项ZDP1705 |
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| 摘 要： | 为了深入了解油气分布规律,利用流体包裹体显微荧光光谱和显微测温以及一维盆地模拟的埋藏热历史,结合地震构造属性和沉积相分析,对泌阳凹陷北部缓坡带核桃园组油气运聚成藏过程进行了研究。结果显示北部缓坡带核桃园组第三段储层检测到橙黄色、黄绿色和蓝绿色3种颜色荧光油包裹体,反映了3幕不同成熟度的原油捕获。油包裹体的丰度和伴生盐水包裹体均一温度和埋藏史曲线表明,北部储层共存在两期三幕充注事件:第一期规模小,发生于断陷末期的相对低成熟度发橙黄色荧光油,第二期发生在中新世构造抬升期的相对高成熟度的黄绿色和蓝绿色荧光油。流体包裹体古压力模拟显示第二期油气充注时储层是超压状态,推测与当时的构造挤压有关。超压持续作用以及北部地层抬升造成与深凹带源岩增加的流体势差为第二期油气提供了强有力的动力;频繁的断层活动,特别是走滑断裂使得单一的砂体顺层输导转变为砂体顺层输导+断裂垂直输导的复合立体运移输导体系,使得原油以高效率运移到凹陷北部缓坡带。这对精细理解构造抬升控制油气大规模运聚具有重要的意义。
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| 关 键 词： | 油气运聚 泌阳凹陷 流体包裹体 构造抬升 |
| 收稿时间： | 2020-04-03 |
Hydrocarbon migration and accumulation process of Hetaoyuan Formation in the northern gentle slope zone of Biyang Depression |
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| Zhang Xin,Chen Honghan,Long Zhao,Liu Qiang.Hydrocarbon migration and accumulation process of Hetaoyuan Formation in the northern gentle slope zone of Biyang Depression[J].Bulletin of Geological Science and Technology,2020,39(3):140-149. |
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| Authors: | Zhang Xin Chen Honghan Long Zhao Liu Qiang |
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| Affiliation: | (Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education,China University of Geosciences(Wuhan),Wuhan 430074,China;Bureau of Geophysical Prospecting INC.,China National Petroleum Corporation,Zhuozhou Hebei 072750,China) |
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| Abstract: | In order to understand the distribution of oil and gas, this paper studies the oil migration and accumulation process of Hetaoyuan Formation in the northern gentle slope zone of Biyang Depression using the micro-fluorescence spectrum and fluid inclusion and the burial-thermal history of one-dimensional basin simulation, combined with the analysis of seismic structural attributes and sedimentary facies. The results show that three kinds of fluorescent color oil inclusions, orange, yellow-green and blue-green, are detected in the third member of Hetaoyuan Formation in the northern gentle slope zone, reflecting three episodes of oil with different maturities. The abundance of oil inclusions and the homogenization temperature and burial history curve of associated aqueous inclusions indicate that there are two stages (three episodes) of filling events in the northern reservoir. The first stage was small in scale, and occurred in the relatively low maturity orange yellow fluorescent oil at the end of fault depression and the second stage appeared in the yellow green and blue green fluorescent oil with higher maturity at the end of Miocene tectonic uplift. The fluid overpressure in the second stage filling shown by the paleopressure simulation of fluid inclusions suggests its relation to the tectonic compaction. The continuous overpressure caused by compression and the fluid potential difference increasing with the source rocks in the deep depression caused by the uplift of the northern strata provide a strong driving force for the second stage of oil and gas. The frequent fault activities, especially strike slip faults, caused the transformation of a single sand body transport along the stratain to a composite transport system of sand body transport along the strata+fault vertical transport, leading to the quick migration of crude oil to the Northern gentle slope zone. It is important to understand the tectonic uplift control of oil and gas migration. |
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| Keywords: | hydrocarbon migration and accumulation fluid inclusion Biyang Depression tectonic uplift |
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