指出由于受实验经费、井点数及取心等因素的限制,目前传统的利用实验室岩心分析评价盖层封闭性的方法存在代表性差、分析时间长、成本高的缺点,而采用声波时差测井法来评价盖层封闭性克服了传统方法的缺点,能够很好的评价气田盖层的封闭性。运用该方法评价克拉2气田盖层后表明,该气田的盖层主要为Ⅳ类和Ⅰ类盖层,封闭性良好。

At present the enclosing capability of cap formation was studied through traditional core analysis in the laboratory. Because of the limitation of experimental expenditure, amount of core hole and coring etc., core analysis has such shortcomings as bad representation, long time needed and high expenditure. In this paper the enclosing capability of cap formation can be appraised by acoustic logging, the study indicates this method has overcome the shortcomings of traditional core analysis, and is good at appraising enclosing capability of cap formation of the Kela 2 gas field. This gas field's cap formation is mainly the first type and forth type cap formation, and the enclosing capability of cap formation is good.