松辽盆地北部火山岩体岩性圈闭评价方法

火山岩体岩性圈闭是松辽盆地深层勘探遇到的新对象，是松辽盆地深层天然气勘探的主要接替战场。通过运用火山岩体岩性圈闭地质风险概率评价方法。依据分别建立的圈闭条件，烃源条件、储层条件、保存条件、配套史条件评价标准，对松辽盆地北部火山岩分布的有利勘探靶区进行了火山岩体岩性圈闭的评价。其评价结果与实际钻效果比较一致，地质风险概率法是目前定量评价火山岩体岩性圈闭相对有效的方法。

Lithologic Trap Evaluation Method of the Volcanic Rock Body in Northern Songliao Basin

Lithologic trap of volcanic rock body is a new object in the deep exploration in Songliao Basin and is a main continuous field of the deep natural gas exploration of Songliao Basin. This paper uses the method of geologic risk probability of volcanic rock body, Basing on the respectively constructed evaluation criteria of trap condition, hydrocarbon source condition, reservoir condition, preserve condition and matching history condition, to perform a lithologic trap evaluation of the volcanic rock body in the north part of Songliao Basin which is a favorable target area of volcanic distribution. The evaluation result conforms to the actual drilling exploration result. Geologic risk probability method is a relative effective method for the quantitative evaluation of volcanic rock body lithologic trap.