富油凹陷洼槽区古压力演化特征及影响因素——以冀中坳陷饶阳凹陷为例

发布时间：2018-07-03 13:44

本文选题：富油凹陷 + 古压力　；参考：《中国矿业大学学报》2017年03期

【摘要】：为了明确富油凹陷洼槽区古压力演化特征,以冀中坳陷饶阳凹陷为研究对象,运用录测井、试油等资料,在现今地层压力研究的基础上,采用盆地模拟技术与流体包裹体测温技术相结合定量恢复了不同洼槽古压力演化过程,并探讨了富油凹陷洼槽区古压力演化的影响因素,认为洼槽区古压力演化经历了原始积累—释放—再积累3个阶段,不同阶段不同洼槽古压力演化特征差异明显;源岩生排烃能力控制的生烃增压作用是大规模生排烃时期(12~0 Ma)古压力明显增强的主要原因.结果表明:饶阳凹陷洼槽区发育东营组—沙一段和沙三段2套压力系统,河间、马西与留西洼槽为上弱下强型,任西洼槽为下强上弱型,其中河间洼槽超压强度最大,压力系数可达1.58.古压力恢复结果表明饶阳凹陷洼槽区成藏期普遍发育超压,最大压力系数可达1.51,相邻构造带发育弱超压,最大压力系数为1.29.洼槽区沉积充填特征决定了不同层系的岩性、厚度与沉积速率等特性,影响了欠压实增压机制对超压的贡献大小;大规模生排烃时期异常压力快速积累,洼槽区古压力变化率fVR随生排烃量差值增大而提高,马西洼槽fVR可达0.030 Ma-1.
[Abstract]:In order to clarify the evolution characteristics of the paleo pressure in the depression trough area of the rich oil depression, the Raoyang depression in Jizhong depression is taken as the research object. On the basis of the current stratigraphic pressure research, the basin simulation technology is combined with the fluid inclusion temperature measurement technology to quantitatively restore the evolution process of the ancient pressure in different trough. The influence factors of the evolution of ancient pressure in the depression trough area are that the evolution of the paleo pressure in the trough area has experienced 3 stages of the original accumulation release and accumulation, and the difference of the paleo pressure evolution characteristics in different stages of the different stages is obvious; the hydrocarbon generation supercharging effect of the source rock generation capacity control is obviously enhanced by the ancient pressure of the 12~0 Ma in the big gauge mode hydrocarbon generation and expulsion. The main reason is that 2 sets of pressure systems are developed in the Raoyang depression trough area of the Raoyang depression and the sands of the Dongying and the sand, the maxi and the Liu Xi depression are upper and weak, and the Ren Xi depression is the lower strength and weak type, among which the overpressure strength of the inter River trough is the largest, the pressure coefficient can reach the 1.58. paleo pressure recovery result indicating the period of the reservoir formation in the depression of the Raoyang depression. The maximum pressure coefficient can reach 1.51, the adjacent tectonic zone develops weak overpressure. The maximum pressure coefficient is the characteristics of the lithology, thickness and deposition rate of different layers in the 1.29. trough area, which affects the contribution of the uncompacted supercharging mechanism to the overpressure, and the rapid accumulation of abnormal pressure during the period of large scale hydrocarbon generation. The Paleopressure variation rate fVR in the trough area increases with the difference of hydrocarbon generation and expulsion amount, and the fVR of Maxi trough is up to 0.030 Ma-1..
【作者单位】：中国石油大学(华东)地球科学与技术学院;中国石油华北油田勘探开发研究院;
【基金】：国家重大科技专项(2016ZX05006-003) 中国石油股份公司重大科技专项(2014E-35) 中央高校基本科研业务费专项资金项目(15CX06015A)
【分类号】：TE122.1

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