四川盆地侏罗系致密油刻度区精细解剖与关键参数研究

四川盆地侏罗系是我国致密油累计产量最高的层系，虽经历3轮资源评价，但均以常规油气的思路和方法进行评价，其致密油资源总量并未得到真实体现。通过分析四川盆地侏罗系致密油的基本地质条件，优选出公山庙油田作为典型刻度区，针对大安寨段和凉高山组2套主力油层开展精细解剖，根据地质条件和单井EUR，将刻度区划分为甜点区、有利区和外围区3种类型，并确定了小面元容积法、分级资源丰度类比法、EUR类比法3种致密油资源评价方法的关键参数取值标准，为四川盆地侏罗系致密油资源评价奠定了基础，也为我国致密油资源评价提供了类比依据。

Fine dissection of Jurassic tight oil calibrated area and key parameters researchin Sichuan Basin,China

The Jurassic in Sichuan Basin is the highest cumulative production series of strata.Based on conventional thoughts and methods,its resource has been estimated three times,but the total amount of tight oil has not been truly revealed.Gongshanmiao Oilfield is selected as typical calibrated area by analyzing basical geological conditions of Jurassic in Sichuan Basin,and two major reservoirs,Da’anzhai and Lianggaoshan Formations,have been finely dissected.According to the geological conditions and single well EUR,Gongshanmiao scale area is divided into three types:Sweet spot area,favorable area and external region.There are three resource evaluation methods including volumetric method for small area,analogous method for abundance of resources and EUR analogous method.Assignment criteria of key parameter for three methods are established.It not only lays a foundation for tight oil resource evaluation in Sichuan Basin,but also provides an analogous basis for national tight oil resource assessment.