摘要
库车坳陷东部下—中侏罗统砂岩储层中发育丰富的液烃包裹体.对与液烃包裹体共生的含烃盐水包裹体特征和显微测温数据的系统分析表明,该地区自中新世中—晚期以来油气持续充注,并存在2期主要的充注过程.第一期发生在早成岩阶段晚期,主要为低成熟油气充注,充注时间为12～10 Ma(大致相当于中新世吉迪克期);第二期发生在中成岩阶段早期,充注时间为9～7 Ma(大致相当于中新世康村期),主要为低成熟油气充注,并伴有少量的发浅黄色荧光的成熟油气充注.不同层位包裹体的丰度有明显差别,下侏罗统阿合组(J1a)和阳霞组(J1y)包裹体丰度(GOI)明显比中侏罗统克孜勒努尔组(J2k)和恰克马克组(J2q)高,这可能与砂岩的粒度有关.下侏罗统砂岩粒度较大,发育比较优质的储层,有利于包裹体发育;中侏罗统砂岩粒度较细,储层物性较差,不利于包裹体发育.
There is developed rich liquid hydrocarbon inclusion in the lower-middle Jurassic sandstone in the east of Kuche Depression.The analysis of hydrocarbon-containing brine inclusion characteristics and microscopic temperature measurement data shows that,hydrocarbon filling in the studied area was carrying out since the middle-late stage of Miocene,and there are two main filling stages.The first stage is in the late period of early diagenetic stage,the time is about in 12~10 Ma(approximately equivalent to Kangcun stage of Miocene),and the filled hydrocarbon is mainly low mature hydrocarbon.The second stage is in the early period of middle diagenetic stage,and the time is in 9~7 Ma(approximately equivalent to Jidike stage of Miocene) the filled hydrocarbon is mainly low mature hydrocarbon in this stage,but a little of light yellow fluorescent mature hydrocarbon is filled.There is obvious difference in the abundance of the inclusion in different formation.The abundance of the inclusion in Ahe Formation(Ja) and Yangxia Formation(J_1y)of lower Jurassic is obviously higher than that in Kezilenuer Formation(J_2k)and Qiakemake Formation(J_2q)of middle Jurassic,which may be related to the particle size of sandstone.The particle size of lower Jurassic sandstone is larger,and there is developed the better reservoir,which is favorable to the development of inclusion.The particle size of middle Jurassic sandstone is fine,and there is developed the worser reservoir,which is not favorable to the development of inclusion.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2011年第4期12-18,6,共7页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家自然科学基金项目(编号:40972141)资助
