准噶尔盆地区域盖层排替压力研究  

Calculation of Displacement Pressure of Regional Caprocks in Junggar Basin

作　　者：刘文国[1] 吴元燕[2] 况军[3] 

机构地区：[1]石油工业出版社,北京100011 [2]石油大学地球科学系,北京102200 [3]新疆石油管理局勘探开发研究院,新疆克拉玛依834000

出　　处：《江汉石油学院学报》2001年第1期17-19,共3页Journal of Jianghan Petroleum Institute

基　　金：中国石油天然气集团公司"九五"重点科技攻关项目!(96 0 0 0 7)

摘　　要：评价盖层物性封闭能力的最根本、最直接的参数是排替压力。排替压力与盖层的许多物性参数存在相关性 ,如排替压力与声波时差存在一定的相关性 ,排替压力与声波时差的倒数 (即声速 )也有相关性。由于声波层速度与地震层速度属性相同 ,因此排替压力与地震层速度之间具有函数关系。通过对准噶尔盆地地震剖面的解释 ,得到地震层速度 ,求取 2套区域盖层的大量的排替压力值 ,作出等值线图 ,对区域盖层的封闭性作出合理的评价和预测 。Displacement pressure is a basic and direct parameter for evaluating the physical sealing of the caprocks and it is related with many physical parameters of the caprocks. Thus the displacement pressure is also related with acoustic velocity, which is the reciprocal of interval transit time. The attribute of acoustic velocity is similar to the seismic interval velocity, so a functional relationship exists between the displacement pressure and seismic interval velocity. The seismic velocity is obtained and the displacement pressure values of two strata are derived by interpreting the seismic sections of Junggar basin, thus an isoline plot is made out and a reasonable evaluation and prediction are carried out for the sealing of regional caprock. The result is matched well with the real situation.

关 键 词：盖层 排替压力 层速度 封闭性 评价 准葛尔盆地 油气地质 

分 类 号：P618.13[天文地球—矿床学]