| 东尼日尔盆地Tenere坳陷上白垩统海相烃源岩评价及勘探潜力 |
| |
| 引用本文： | 刘邦,潘校华,万仑坤,毛凤军,刘计国,程顶胜.东尼日尔盆地Tenere坳陷上白垩统海相烃源岩评价及勘探潜力[J].海相油气地质,2012,17(1):29-34. |
| |
| 作者姓名： | 刘邦 潘校华 万仑坤 毛凤军 刘计国 程顶胜 |
| |
| 作者单位： | 中国石油勘探开发研究院 |
| |
| 基金项目： | 本文受"十一五"国家科技重大专项之课题 |
| |
| 摘 要： | 东尼日尔盆地是中西非裂谷系中典型的中—新生代裂谷盆地。Tenere坳陷位于盆地西北部,包括西部凹陷、东Ⅰ凹陷和东Ⅱ凹陷。对Saha-1井上白垩统岩屑样品的分析揭示,干酪根显微组分以不发荧光或弱荧光的无定形体为主,岩石抽提物中C29甾烷优势明显,说明该井上白垩统泥岩有机质输入以陆源植物为主。岩石热解分析表明上白垩统Yogou组泥岩大多数为中等—好烃源岩,有机质以Ⅱ2-Ⅲ型为主,Donga组泥岩大部分为差—中等烃源岩,以Ⅲ型为主;岩石热解峰温指示烃源岩成熟门限深度为2300 m左右。生烃史模拟显示,Saha-1井Yogou组泥岩尚未开始生烃,Donga组在白垩纪末期开始生烃,下部已进入生气阶段。综合研究认为Tenere坳陷的西部凹陷勘探潜力较大,而东Ⅰ凹陷和东Ⅱ凹陷潜力有限。
|
| 关 键 词： | 东尼日尔盆地 Tenere坳陷 上白垩统 海相地层 烃源岩评价 勘探潜力 |
Evaluation and Exploration Potential of Upper Cretaceous Marine Source Rocks in Tenere Depression, Eastern Niger Basin |
| |
| Liu Bang
,
Pan Xiaohua
,
Wan Lunkun
,
Mao Fengjun
,
Liu Jiguo
,
Cheng Dingsheng.Evaluation and Exploration Potential of Upper Cretaceous Marine Source Rocks in Tenere Depression, Eastern Niger Basin[J].Marine Origin Petroleum Geology,2012,17(1):29-34. |
| |
| Authors: | Liu Bang Pan Xiaohua Wan Lunkun Mao Fengjun Liu Jiguo Cheng Dingsheng |
| |
| Institution: | Liu Bang,Pan Xiaohua,Wan Lunkun,Mao Fengjun,Liu Jiguo,Cheng Dingsheng |
| |
| Abstract: | Eastern Niger Basin is a typical Mesozoic-Cenozoic intracontinental rift basin of the Central-Western African rift system.The Tenere Depression,located in the northwestern part of the basin,includes the Western Sag,EasternⅠ Sag and EasternⅡ Sag.Analysis of mudstone cuttings from Well Saha-1 has revealed that kerogen macerals are dominated by amorphinite without or with weak fluorescence and C 29 regular sterane are predominant in rock extracts.On these characteristics,it is suggested that the organic matter of the Upper Cretaceous mudstones mainly derived from terrigenous plants.Rock-Eval pyrolysis data reveals that the Upper Cretaceous Yogou mudstone generally is moderate to good hydrocarbon source rock with predominant Type Ⅱ 2 to Type Ⅲ of kerogen while the Donga mudstone is mainly poor to moderate source rocks with Type Ⅲ of kerogen.The T max values indicate that the depth of hydrocarbon-generating threshold is about 2300m.Thermal-burial history modeling implies that of Yogou mudstone(Well Saha-1) is not mature.Donga mudstone has reached the oil-generating threshold at the end of Cretaceous and the lower part of Donga is in gas-generating stage.By integrated study,it is suggested that better potential for hydrocarbon exploration exists in Western Sag compared with that in the EasternⅠ Sag and EasternⅡ Sag. |
| |
| Keywords: | Upper Cretaceous Marine strata Source rock Evaluation Exploration potential Tenere Depression Eastern Niger Basin |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
