东濮凹陷方里集构造带油气来源及成藏期
通过精细油源对比、气源对比,明确了渤海湾盆地东濮凹陷方里集构造带的油气来源;基于流体包裹体的光性特征和均一温度,结合埋藏史确立了油气成藏时间及期次,恢复了油气成藏过程。油源对比结果表明,沙三段原油和烃源岩地球化学指标相近,具有自生自储特征,沙二段和沙三段天然气以煤成气为主,为断层输导成藏。沙三段油包裹体荧光下呈蓝色,盐水包裹体均一温度峰值为130℃~140℃,原油成藏期为明化镇组晚期—平原组中期(距今1~3 Ma)。根据山西组—本溪组煤系烃源岩的热演化史,煤成气的成藏期为东营组时期,早于原油的成藏时间。油气成藏过程恢复表明:在东营组中期至东营组剥蚀期间,煤成气通过断层输导,形成沙二段气藏和沙三...
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Published in | 地球科学与环境学报 Vol. 39; no. 4; pp. 530 - 538 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
中国石化石油勘探开发研究院,北京,100083%中国石化中原油田勘探开发研究院,河南濮阳,457001
2017
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Subjects | |
Online Access | Get full text |
ISSN | 1672-6561 |
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Summary: | 通过精细油源对比、气源对比,明确了渤海湾盆地东濮凹陷方里集构造带的油气来源;基于流体包裹体的光性特征和均一温度,结合埋藏史确立了油气成藏时间及期次,恢复了油气成藏过程。油源对比结果表明,沙三段原油和烃源岩地球化学指标相近,具有自生自储特征,沙二段和沙三段天然气以煤成气为主,为断层输导成藏。沙三段油包裹体荧光下呈蓝色,盐水包裹体均一温度峰值为130℃~140℃,原油成藏期为明化镇组晚期—平原组中期(距今1~3 Ma)。根据山西组—本溪组煤系烃源岩的热演化史,煤成气的成藏期为东营组时期,早于原油的成藏时间。油气成藏过程恢复表明:在东营组中期至东营组剥蚀期间,煤成气通过断层输导,形成沙二段气藏和沙三段早期气藏;在明化镇组晚期—平原组中期,沙三段烃源岩生成的原油就近充注于沙三段气藏中,形成了沙三段油气藏。方里集构造带具有"双源两期"的成藏特征。 |
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Bibliography: | GUO Dian-bin1 , WAN Tao2 , LI Ji-dong2 , YUAN Bo2 , YUAN Li2 (1. SINOPEC Petroleum Exploration and Production Research Institute, Beijing 100083, China;2. Exploration and Development Research Institute, Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, Henan, China) Hydrocarbon sources and reservoir forming stages in Fangliji tectonic belt of Dongpu depression,Bohai Bay Basin were studied by fine oil and gas source contrasts;combined with the characteristics of microscopic fluorescence and homogenization temperatures of fluid inclusions and buried history,the reservoir forming periods and stages were discussed,and the hydrocarbon forming process was reconstructed.The oil and gas source contrasts show that the crude oil and hydrocarbon source rocks in Sha 3 member are similar;and have characteristics of self-generating and self-preserving;the gas in Sha 3 member is main coal bed gas,and is fault migration reservoir.The fluorescence of oil inclusion is blue,and the peak of homogenization temperatures of saline |
ISSN: | 1672-6561 |