摘要
有机酸的形成及分布越来越受到人们的重视。烃源岩的有机质在向干酪根及油气的转化过程中不断地释放出酸性成分 ,释放的有机酸进入储集层水体将改变水介质性质 ,使地层水由碱性变为酸性 ,有利于次生孔隙的形成。通过恢复地层中的有机酸形成过程 ,正确确定烃源岩排酸量及介质中有机酸的浓度 ,有助于预测研究区储集层次生孔隙的形成、发育和分布状况。文中应用柴达木盆地西部地区的实测数据 ,建立了研究区内Ⅱ型干酪根的有机酸生成及演化模式。以模式为指导 ,结合地层压实理论定量恢复E23 和N1 两套烃源岩的有机酸形成演化过程及空间展布特征 ,指出潜在的储集层次生孔隙发育带分布于油泉子构造、咸水泉构造、南翼山构造和南乌斯构造等。图 2表 1参 4(徐怀民摘 )
The forming and distribution of organic acid is becoming a hot topic. Through recovering the forming process of organic acid in formation, we can forecast whether secondary pores are developing. This paper makes use of the actual data of western Qaidam basin and establishes the forming and evolution model of organic acid. Guided by the model, combining with formation compaction theory, we recover the forming, evolution process and distribution of organic acid of E^2 3 and N 1 source rock and point out the potential zones where develop secondary pores as follows: Youquanzi structure, Xianshuiquan structure, Nanyishan structure and Nanwusi structure.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2000年第6期23-25,共3页
Petroleum Exploration and Development
关键词
茫崖坳陷
有机酸形成
演化模式
油气形成
Organic acid, Formation water, Kerogen, Thermal maturity, Secondary pore, Mangya depression
