泌阳凹陷油气田形成、保存、破坏的古水文地质分析

PALAOHYDROGEOLOGIC ANALYSIS OF FORMATION, PRESERVATION AND DISRUPTION OF OIL/GAS FIELD IN BIYANG DEPRESSION

本文在论述了泌阳凹陷地质背景、石油地质特征及古水文地质分期的基础上,详细分析了油气生成的时期及之后沉积水动力场特征及其与油气聚集的关系,分析了油气田形成之后淋滤—渗入水对油气田保存和破坏。最后提出了油气聚集区段的分布规律,预测了石油勘探有利地段。实践证明,用古水文地质方法研究油气田是行之有效的。

The formation, movement, accumulation and dispersion of oil/gas have close relation with palao-groundwater. So it is very necessary to study palaohydrogeologic problems of oil/gas-bearing basin. This paper first describes the characteristics of geology and petroleum geology, then classifies the palaohydrogeologic periods, and then analyzes palaohydrogeologic conditions of formation, preservation and disruption of oil/gas field in Biyang depression, especially the characteristics of palaohydrodynamic field during (and after) oil/gas formation stage, and the relation between palaohydrodynamic field and distribution of oil/gas diposits. It has been proved that palaohydrogeologic analysis is highly effective in the study oil/gas field.