东濮凹陷地层流体的热循环对流与成岩圈闭的形成

THE FLUID-FLOWING CONVECTION AND THE FORMATION OF DIAGENETIC TRAPS IN THE DONGPU DEPRESSION

纪友亮 赵澄林 刘孟慧

Ji Youliang Zhao Chenlin Liu Menghui

石油大学, 山东 东营 257062

Petroleum University, China

本文讨论了地层流体的热循环对流对次生孔隙形成和分布的影响。指出由于地层上倾方向封闭性断层的遮挡、超压带的存在及流体来源的不足等原因,东濮凹陷在埋深4000m以下的储层中,流体的上升运动趋于终止,而以热循环对流运动为主,流体的热循环对流使溶解物质不断迁移,在深部形成局部的次生孔隙发育带和成岩圈闭。

The discussions are made on the influence of fluid-flowing convection over the formation and distribution of secondary pores.It is pointed out that the upwelling of fluid-flowing should cease in the depth of 4000m in the reservoirs of the depression due to the barrier fault of upward dipping players,the existence of overpressure and insufficient fluid source.Therefore,the thermal-cyclic convection flowing is predominated and the continuous transformation of soluted material took place by the convection flowing,bringing about the formation of secondary pores and diagenetic traps in deep part of the Dongpu Depression

https://doi.org/10.11781/sysydz199501008