鄂尔多斯盆地安塞地区长9 油层组流体包裹体特征与成藏时间
网络出版日期: 2013-11-26
基金资助
陕西省自然科学基础研究计划项目“鄂尔多斯盆地致密砂岩油藏成藏物性下限研究”(编号:2013JM5007)和陕西省教育厅专项科研计划项目“鄂尔多斯盆地延长组深层石油成藏机理研究”(编号:12JK0491)联合资助。
Characteristics of fluid inclusion and accumulation period of Chang 9 oil reservoir set in Ansai area, Ordos Basin
Online published: 2013-11-26
为了确定安塞地区延长组长9 油层组的石油充注成藏时间,对该区储层样品进行了包裹体镜下 显微观察、荧光分析及石英次生加大边中伴生盐水包裹体显微测温,并结合长9 油层组埋藏-热演化史 模拟,确定了该区油气运移成藏的时间。结果表明:安塞地区长9 油层组主要发育盐水包裹体和含液态 烃包裹体,大多分布在石英次生加大边和溶蚀微裂隙中,包裹体形态以近圆形和不规则形为主,大小一 般为2~6 μm,其均一温度呈明显的单峰分布,主要为100~110 ℃。长9 油层组主要发生过一期油气
充注,对应的地质历史时间为早白垩世中晚期(100~120 Ma)。
卫平生 , 雍学善 , 潘建国 , 高建虎 , 曲永强 , 桂金咏 . 鄂尔多斯盆地安塞地区长9 油层组流体包裹体特征与成藏时间[J]. 岩性油气藏, 2013 , 25(6) : 79 -83 . DOI: 10.3969/j.issn.1673-8926.2013.06.014
In order to determine the hydrocarbon filling and accumulation period of Chang 9 oil reservoir set in Ansai area, based on the microscopic observation of fluid inclusion, fluorescence analysis and micro thermometry of associated saline inclusion in quartz overgrowth boundary, combined with the simulation of burial-thermal evolution history of Chang 9 oil reservoir set, the hydrocarbon migration and accumulation time were confirmed. The result shows that Chang 9 oil reservoir set mainly developed saline inclusion and liquid hydrocarbon inclusion. They mainly distributed in the overgrowth edge of quartz and its dissolved fractures, with circular and irregular forms and the size of 2~6 μm. The homogenization temperature shows unimodal distribution, and mainly ranges from100 ℃ to 110 ℃. One time of hydrocarbon charging occurred in Chang 9 oil reservoir set, corresponding to the middle and late period of Early Cretaceous ( 100~120 Ma ) in the geological history.
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