东濮凹陷天然气富集规律
发布时间：2018-12-13 07:25
【摘要】：通过实验模拟,气体组分及同位素特征分析,对东濮凹陷不同类型天然气藏进行了聚类分析,并对成因进行判识。明确了古近系和石炭—二叠系2套烃源岩,在高热演化条件下可依次形成原油裂解气、湖相泥岩干酪根晚期裂解气及煤成气,3种主要生气方式造就了东濮凹陷深层富气。成因判识及气藏动态过程分析表明,东濮凹陷凝析气藏及煤成气藏具有"近源聚集、接力成藏、W型分布"的成藏特征。结合典型气藏解剖,指出深层凝析气及煤成气的富集主要受高热演化烃源岩的分布控制,其中,凝析气藏的有利勘探区域受深度(小于4 350 m)、坡度(同沉积断层)、有机质丰度(TOC0.8%)("三度")控制,二次生烃区域斜坡构造部位及深层储层"甜点"发育区是古近系深层凝析气藏勘探重点领域。煤成气的有利勘探区域主要集中在上古生界煤系源岩Ro2.0%、生气强度大于20×108 m3/km2的区域,中央隆起带及斜坡中下部位为有利勘探区。
[Abstract]:By means of experimental simulation, gas composition and isotopic analysis, the different types of natural gas reservoirs in Dongpu depression are analyzed by cluster analysis, and the origin of the gas reservoirs is identified. Two sets of hydrocarbon source rocks, Paleogene and Carboniferous-Permian, can be formed in order under high thermal evolution conditions. The late kerogen cracking gas and coal-formed gas of lacustrine mudstone have been formed. Three main gas generation modes have resulted in deep rich gas in Dongpu depression. Genetic identification and gas reservoir dynamic process analysis show that the condensate gas reservoir and coal-formed gas reservoir in Dongpu sag have the characteristics of "near source accumulation, relay reservoir formation and W type distribution". Combined with the anatomy of typical gas reservoirs, it is pointed out that the enrichment of deep condensate gas and coal-formed gas is mainly controlled by the distribution of high thermal evolution source rocks, and the favorable exploration area of condensate gas reservoir is subject to depth (< 4 350 m), slope (synsedimentary fault). Organic matter abundance (TOC0.8%) ("three degrees") control, secondary hydrocarbon generating region slope structure and deep reservoir "dessert" development area is the Paleogene deep condensate gas reservoir exploration key area. The favorable exploration area of coal-formed gas is mainly concentrated in the area where the Ro2.0%, gas intensity of the Upper Paleozoic coal measure source rock is more than 20 脳 10 ~ 8 m3/km2, and the central uplift zone and the middle and lower part of the slope are favorable exploration areas.
【作者单位】： 中国石化中原油田分公司;中国石化中原油田分公司勘探开发研究院;
【基金】：国家科技重大专项课题“东濮凹陷油气富集规律与X棿⒘煊颉，
本文编号：2376146
[Abstract]:By means of experimental simulation, gas composition and isotopic analysis, the different types of natural gas reservoirs in Dongpu depression are analyzed by cluster analysis, and the origin of the gas reservoirs is identified. Two sets of hydrocarbon source rocks, Paleogene and Carboniferous-Permian, can be formed in order under high thermal evolution conditions. The late kerogen cracking gas and coal-formed gas of lacustrine mudstone have been formed. Three main gas generation modes have resulted in deep rich gas in Dongpu depression. Genetic identification and gas reservoir dynamic process analysis show that the condensate gas reservoir and coal-formed gas reservoir in Dongpu sag have the characteristics of "near source accumulation, relay reservoir formation and W type distribution". Combined with the anatomy of typical gas reservoirs, it is pointed out that the enrichment of deep condensate gas and coal-formed gas is mainly controlled by the distribution of high thermal evolution source rocks, and the favorable exploration area of condensate gas reservoir is subject to depth (< 4 350 m), slope (synsedimentary fault). Organic matter abundance (TOC0.8%) ("three degrees") control, secondary hydrocarbon generating region slope structure and deep reservoir "dessert" development area is the Paleogene deep condensate gas reservoir exploration key area. The favorable exploration area of coal-formed gas is mainly concentrated in the area where the Ro2.0%, gas intensity of the Upper Paleozoic coal measure source rock is more than 20 脳 10 ~ 8 m3/km2, and the central uplift zone and the middle and lower part of the slope are favorable exploration areas.
【作者单位】： 中国石化中原油田分公司;中国石化中原油田分公司勘探开发研究院;
【基金】：国家科技重大专项课题“东濮凹陷油气富集规律与X棿⒘煊颉，
本文编号：2376146
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