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准噶尔盆地区域盖层排替压力研究
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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 ,研究结果与实际情况吻合
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 interpretating 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
引文
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    [3] Grunau H R.A worldwide look at the cap-rock problem [J] .J. Pet. Geol.,1987,10 (3) :2 45~ 2 6 6 .
    [4]黄志龙 ,郝石生 .盖层突破压力及排替压力求取方法 [J] .新疆石油地质 ,1994,15 (2 ) :16 3~ 16 6 .
    [5 ]张万选 ,曾洪流 ,刘震等 .陆相地震地层学 [M] .东营 :石油大学出版社 ,1993.

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