| 柴达木盆地归属问题的讨论 |
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| 引用本文： | 孙镇城,乔子真,杨革联,张海泉,景民昌,杨藩,孙乃达.柴达木盆地归属问题的讨论[J].古地理学报,2002,4(1):59-66. |
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| 作者姓名： | 孙镇城 乔子真 杨革联 张海泉 景民昌 杨藩 孙乃达 |
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| 作者单位： | 1.石油大学（北京）地球科学系 北京 102249;2.青海石油公司勘探开发研究院 敦煌736202 ;3.首都师范大学 北京100037 |
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| 基金项目： | 中国石油天然气总公司“九五”攻关项目 (95 0 2 0 8) |
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| 摘 要： | 柴达木盆地西部已找到17个第三系油源的油田，其主要烃源岩层位是陆相始新统下干柴沟组。也有论文提出下干柴沟组是海侵湖泊沉积，并被命名为下干柴沟海侵。最近又有论文提出该组地层不是深湖相，应属于泻湖相，是塔里木盆地西南始新世海湾泻湖相带被阿尔金断裂东错的残留泻湖部分，或塔里木盆地原型盆地的东部被错移部分，并提出重新认识柴达木盆地西部的油气勘探方向。本文针对上述观点展示了塔里木盆地西部海湾古新统-始新统的吐依洛克组、阿尔塔什组、齐姆根组、盖吉塔格组、卡拉塔尔组的沉积相和典型的海相生物化石群，它完全不同于柴达木盆地古新统-始新统的路乐河组和下干柴沟组沉积相和陆相湖泊生物化石群，两者是截然不同的。不能支持柴达木盆地西部与塔里木盆地西南海湾在老第三纪时属于同一盆地或同一沉积单元。“源控论”依然是指导柴达木盆地西部陆相沉积油气勘探的理论依据。把塔里木盆地西南已知油气田的烃源岩划归老第三系海相沉积，显然是误解，把塔里木盆地西南老第三系海相油气勘探部署推广到柴达木盆地西部陆相沉积区也是一种误导。科学的古地理观将有助于勘探工作的正确部署。
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| 关 键 词： | 柴达木盆地 塔里木盆地 第三纪 深水湖泊 石油勘探 烃源岩 海相沉积 |
| 文章编号： | 1671-1505(2002)01-0059-08 |
| 修稿时间： | 2001年7月20日 |
DISCUSSION ON OWNERSHIP OF QAIDAM BASIN |
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| Sun Zhencheng Qiao Zizhen Yang Gelian ,Zhang Haiquan Jing Minchang Yang Fan Sun Naida University of Petroleum,Beijing Qinghai Petroleum Administration,China National Petroleum Corporation,Dunhuang.DISCUSSION ON OWNERSHIP OF QAIDAM BASIN[J].Journal of Palaeogeography,2002,4(1):59-66. |
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| Authors: | Sun Zhencheng Qiao Zizhen Yang Gelian Zhang Haiquan Jing Minchang Yang Fan Sun Naida University of Petroleum Beijing Qinghai Petroleum Administration China National Petroleum Corporation Dunhuang |
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| Institution: | 1.University of Petroleum (Beijing)，Beijing , 1022491;2.Qinghai Petroleum Administration, China National Petroleum Corporation, Duihuang, 736202;3.Capital Normal University, Department of Geography, Beijing, 100037 |
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| Abstract: | In west Qaidm Basin, 17 oilfields with Tertiary source rocks have been found. The main source rocks are Lower Ganchaigou Formation of terrestrial facies of Eocene. Some people thought that the Lower Ganchaigou Formation be formed by marine transgression, and named it Lower Ganchaigou Transgression. Recently, the Lower Ganchaigou Formation was considered as lagoon facies instead of deep lake facies. In addition, it was regarded as relict lagoon broken from southwest bay lagoon of Tarim Basin in Eocene by Altun shift fault, or as the east part broken from Tarim Basin prototype. On the basis of such opinion, the authors of that paper thought that the direction of exploration in the west Qaidam Basin should be reconsidered. Maps of Paleocene and Eocene sedimentary facies and typical marine biologic groups of Tuilok, Altax, Qimgon, Gejitar and Karatar Formations in bay of the west Tarim Basin provided in this paper differ completely from those of Lulehe and lower Ganchaigou Formations in Qaidam Basin. Evidences can not support that the west Qaidam Basin and the southwest Tarim Basin belong to the same basin or the same sedimentation unit in Paleogene. The source controlling theory (the distribution of oil and gas fields are controlled by source sags) is still the principle efficient for directing petroleum exploration in continental sedimentation in the west Qaidam Basin.It is misunderstanding to regard source rocks of oil fields founded in the southwest Tarim Basin as Paleogene marine sediments.It is also misleading to put the exploration method of Paleogene marine sediments into exploration of Paleogene continental sediment in the west Qaidm Basin. Scientific view on palaeogeography will do more help for explorationist in explorative deployment. |
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| Keywords: | Qaidam Basin Tarim Basin Tertiary micropaleontology deep lake petroleum exploration |
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