摘要
地层水矿化度的变化主要受沉积水体、成岩作用和烃类演化等因素的控制。通过对地层水矿化度变化的分析。可以为油气的成藏环境分析和油藏预测提供重要信息。对潜江凹陷南部地层水化学特征与油气成藏关系的研究发现:①地层沉积时水体的原始矿化度控制了地层水中矿化度分布的整体格局;②地层水中矿化度的分布、地层压实、成岩作用和烃类演化等地质作用之间具有一致的阶段性,代表着良好的生、储、排配置环境;③高矿化度水地层的压实速率大大低于淡水地层,更有利于储层孔隙的保存;④封闭的水化学环境对油气藏的形成和保存是非常重要的。
The variation of salinity in formation water is mainly controlled by the factors of sedimentary water, diageneses and hydrocarbon evolution. Through analysis of salinity in formation water, important information can be provided for analyzing pool forming environment and predicting reservoirs. In studying formation water chemical characteristics and relations of hydrocarbon generation in the south of Qianjiang Depression, it is found that (1) the arrangement of salinity distribution in formation water is controlled by the salinity of sedimentary waters (2) salinity generation in formation water, formation compaction, diageneses and hydrocarbon generation are coherent stages, which represent good environments of petroleum generation, reserve and drainage; (3) the formation compaction velocity in high salinity formation is lower than that in fresh water formation, which is beneficial to preserve reservoir porosity; (4) closed formation water chemical environment is very important for pool forming and preserving.
出处
《江汉石油学院学报》
EI
CSCD
北大核心
2003年第3期15-17,共3页
Journal of Jianghan Petroleum Institute
基金
"九五"国家重点科技攻关项目(96-110-02-01-02)
关键词
地层水化学
油气成藏
江汉盆地
潜江凹陷
salinity of formation water
pool forming
Jianghan Basin
Qianjiang Depression
