| 羌塘盆地中侏罗统布曲组包裹体特征及油气成藏期次研究 |
| 投稿时间：2024-05-24 修订日期：2024-07-28 点此下载全文 |
| 引用本文： |
| DOI： |
| 摘要点击次数: 162 |
| 全文下载次数: 0 |
|
|
| 中文摘要:羌塘盆地不同构造位置的布曲组(J2b)碳酸盐岩储层油气成藏期次尚不明确。本文以南羌塘毕洛错地区和北羌塘胜利河地区的布曲组储层为研究对象,开展了流体包裹体岩相学、显微测温及测盐等工作,结合埋藏史,确定油气充注过程及成藏期次。结果表明,毕洛错地区在埋藏期经历了3期烃类充注,第Ⅰ期在晚侏罗世-早白垩世,为大量油充注期,第Ⅱ期在晚白垩世,为油气充注期,第Ⅲ期充注发生在古近纪早期,为大量天然气充注；胜利河地区在埋藏期也经历了3期烃类充注,第Ⅰ期发生在早白垩世,为大量油及少量天然气充注；第Ⅱ期发生在晚古新世-早始新世,以油气充注为主；第Ⅲ期成藏在晚始新世,为大量天然气充注。南、北羌塘布曲组均发育晚期较高均一温度的包裹体,除了与逆冲推覆构造有关外,可能也与岩浆热液活动有关。在新生代发育第二次成藏。整体而言,南羌塘油气成藏期普遍早于北羌塘。 |
| 中文关键词:羌塘盆地 布曲组 流体包裹体 逆冲 成藏期次 |
| |
| Fluid inclusion Characteristics and the Hydrocarbon Accumulation Stages of the Middle Jurassic Buqu Formation in the Qiangtang Basin |
|
|
| Abstract:The hydrocarbon accumulation stages of the Buqu carbonate reservoirs (J2b) in different tectonic units at Qiangtang Basin were still not clear. In this study, the carbonate reservoirs of the Buqu Formation in the Biluo Co area at Southern Qiangtang and in the Shengli River area at Northern Qiangtang were taken as research objects, and the petrography, microthermometry and salt measurement of fluid inclusions were carried out. The results showed that the Biluo Co area experienced three stages of hydrocarbon charging during the burial period. The first stage was in the Late Jurassic-Early Cretaceous, which was a large amount of oil charging period. The second stage was in the Late Cretaceous, which was oil and gas charging period. The third stage occurred in the early Paleogene, which was a large amount of natural gas charging. The Shengli River area also experienced three stages of hydrocarbon charging during the burial period. The first stage occurred in the Early Cretaceous, which was filled with a large amount of oil with minor natural gas. The second stage occurred in the Late Paleocene- Early Eocene, dominated by oil and gas filling. And the third stage of accumulation was in the late Eocene, filling a large amount of natural gas. The Buqu Formation in the both southern and northern Qiangtang developed fluid inclusions with relatively high homogenization temperature in the late stage, which is possibly related to the thrust faults or magmatic hydrothermal activities. The second accumulation was developed in the Cenozoic. In general, the hydrocarbon accumulation period of Southern Qiangtang was earlier than that of Northern Qiangtang. |
| keywords:Qiangtang Basin the Buqu Formation Fluid inclusion Thrust faults Hydrocarbon accumulation stages |
| 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|
