南阳凹陷古近系核桃园组二段储集层流体包裹体

根据南阳凹陷东庄、张店和北马庄油田古近系核桃园组二段储集层岩心样品的流体包裹体资料，对核二段储集层油气充注史和主成藏期进行了研究。对各期次流体包裹体的均一温度、盐水包裹体的盐度以及油包裹体的荧光观察等综合分析表明，核二段储集层共经历3期热流体活动，前两期发生油充注。时间温度埋藏史研究表明，第一期油充注发生于凹陷逐渐抬升的廖庄组沉积期及之后的整体抬升剥蚀阶段，第二期油充注发生于凹陷再次下沉接受沉积的拗陷期。综合油包裹体荧光分析、均一温度分布特征和油充注时生油凹陷烃源岩的热演化特征认为，第一期油充注以低-中成熟原油为主，对成藏贡献不大；第二期以中-高成熟原油为主，为南阳凹陷主要充注成藏期。图7表1参14

Fluid inclusions of Palaeogene Eh2 reservoir of Hetaoyuan Formation, Nanyang Sag

Based on the Eh2 reservoir core samples from the Dongzhuang, Zhangdian and Beimazhuang Oilfields of Nanyang sag, a systematic analysis of fluid inclusions is employed to study the hydrocarbon charging histories in the reservoir. Fluorescence observation on petroleum inclusions and micro thermometry of both petroleum and aqueous inclusions indicate that the Eh2 reservoir experienced three stages of thermal fluid activity, and the first and second stages were associated with petroleum charging. The homogenization temperature and time-temperature burial history shows that the first petroleum charging occurred in the late rifting period and uplifting stage of Nanyang sag, and the second petroleum charging happened in the depression stage. Analysis of fluorescence observation and homogenization temperature distribution of petroleum inclusions, and the source rocks thermal evolution during the petroleum charging shows that the first petroleum charging is composed of low-middle maturation oil and the amount is little, and the second petroleum charging is composed of middlehigh maturation oil and is the main petroleum charging of Nanyang sag.