济阳坳陷下第三系温度、压力与深部储层次生孔隙的关系

济阳坳陷地温梯度偏高，存在异常高压带，下第三系深部储层次生孔隙类型丰富。研究认为：⑴受温度作用控制，烃源岩中不同类型的有机质在成熟过程中产生的有机酸有益于次生孔隙的形成；⑵成熟烃源岩丰富的有机质，是形成次生孔隙的有利基础；⑶高地温有利于储层形成次生孔隙；④异常主压有助于深部储层次生孔隙的保存；⑸高地温、异常高四段有利，沙四段又较孔店组有利；横向上，东营凹陷染家楼一牛庄一六户、利津一民丰和樊家北－纯

RELATIONSHIP BETWEEN TEMPERATURE-PRESSURE AND SECONDARY PORES OF DEEP RESERVOIRS IN EOGENE AT JIYANG DEPRESSION

The solution-type secondary pore is one of the most important types of pores in Eogene reservoirs in Jiyang Depression. Especially, it is significant that there are both higher geotemperature and abnormal overpressure in this Depression. The factors that dominate producing and preserving secondary pores in deep reservoirs (>4000m) are disscussed by means of analysing the basic characteristics of the secondary pores, experimenting hydrous pyrolysis with source rocks, suming up the characteristics of both temperature and pressure. The conclusion is summarized as follows: (1) The organic acids, which are produced by organic matter in source rock in maturing process, are advantageous to making secondary pores; (2) The abundant organic matter in source rock is beneficial basis to forming secondary pores; (3) The higher geotemperature is conducive to forming secondary pores; (4) The abnormal overpressure is helpful to preserving secondary pores in deep reservoir; (5) The organic disposition between higher geotemperature and abnormal overpressure zone play an important effect on developing secondary pores. On the above basis of study, the advantageoas areas, where the secondary pore zones would be found out, are forecasted preliminarily. It is suggested that the more beneficial region be Liangjialou-Niuzhuang-Liuhu, Lijin-Minfeng and Fanjiabei-Chunhua areas in Donying Depression as well as Bonan and Gubei areas in Zhanhua Depression.