准中4区块侏罗系储层成岩及油气充注特征研究

摘要

为明确准中4区块侏罗系储层油气成藏规律,利用岩心描述、岩石薄片观察、扫描电镜、粒度分析、包裹体测温等方法和手段,结合埋藏史和热史资料,对储层岩石学特征、成岩作用特征、油气充注特征进行了分析.研究结果表明:研究区侏罗系储层岩性以长石岩屑砂岩为主,且经历了复杂的成岩过程;经历了3期油气充注.此外,分析了油气充注与成岩作用的耦合关系,头屯河组经历了有利的油气充注过程,具有较大的勘探潜力,可作为后期勘探方向.%In order to define the regularity of hydrocarbon accunulation of Jurassic reservoirs in Middle 4 area of Jungar Basin,by the methods of core description,thin section observation,SEM,grain size analysis,temperature measurement of inclusions and other methods,combined with the burial history and thermal history,analyze the petrological characteristics,diagenesis and hydrocarbon filling characteristics.The results show that the major rock type of the Jurassic reservoir lithology in the study area is dominated by feldspathic fithic sandstone,which has experienced complex diagenesis process,and experienced three stages of hydrocarbon filling.In addition,the coupling relationship between hydrocarbon filling and diagenesis is analyzed.The Toutun River formation has experienced favorable hydrocarbon filling process,has great exploration potential,and can be the later exploration direction.