大庆长垣以东地区泉一、二段泥岩盖层封气能力综合评价

为了准确评价盖层毛细管封闭能力 ,综合考虑盖层本身封闭性和宏观发育特征及天然气本身性质对封闭能力的影响 ,给出了假定外力作用下天然气通过泥岩盖层渗滤速度的计算公式及参数确定方法 ,并根据泥岩盖层渗滤速度的大小 ,提出了泥岩盖层封气能力等级划分标准 .采用该方法综合评价了大庆长垣以东地区泉一、二段泥岩盖层封气能力 ,结果表明 :泉一、二段泥岩盖层在安达 -肇洲背斜带具有好的封气能力 ,由此向东北和东南封气能力由好变差

Comprehensive evaluation of sealing gas ability of K1q 1+2 mudstone cap rock east of Daqing placanticline

In order to evaluate accurately caprock capillary sealing ability, comprehensively take into account the caprock sealing ability and macroscopic feature and natural gas feature,the formula calculating the permeation velocity of gas through mudstone caprock under the action of a exerted pressure and the method of determining parameter are put forward. According to the value of the permeation velocity of gas through mudstone caprock, the grade of ability of mudstone caprock sealing gas is given. This paper evaluates the comprehensive sealing gas ability of K 1q 1+2 mudstone caprock, which has good sealing gas ability in Anda\|Zhaozhou sag and its sealing ability deteriorates in the direction of north\|east and south\|east.