| 塔北—南天山地区震旦—奥陶纪盆 山构造演化及其与油气关系 |
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| 引用本文： | 汪新文,陈发景.塔北—南天山地区震旦—奥陶纪盆 山构造演化及其与油气关系[J].现代地质,1997,11(3):313-321. |
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| 作者姓名： | 汪新文 陈发景 |
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| 摘 要： | 震旦—奥陶纪时期塔北与南天山地区在“新疆古克拉通”的基础上经历了一个伸展、裂离和挤压、聚合的完整旋回。该区由南向北大致可分为３个近于平行的与伸展作用有关的构造区带：（１）南库鲁克塔格裂陷槽—满加尔克拉通边缘坳陷—塔里木克拉通内坳陷；（２）北库鲁克塔格—铁门关—老虎台隆起带；（３）南天山洋盆。该时期的构造演化可大致分为３个阶段：（１）震旦纪伸展 裂陷阶段；（２）寒武纪—早奥陶世伸展 裂离阶段；（３）中—晚奥陶世挤压 聚合阶段。具有伸展盆地性质的满加尔克拉通边缘坳陷是该区的主力生油坳陷，其热演化程度高，位于其北侧的继承性古隆起及斜坡是主要的油气运移指向和聚集场所。
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| 关 键 词： | 南天山 塔北 震旦—奥陶纪 构造演化 油气 |
COAL DERIVED HYDROCARBON POTENTIAL AND THERMAL SIMULATING EXPERIMENT ON COAL DERIVED GAS FROM ORDOS BASIN |
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| Abstract: | The Rock Eval analysis results of coal from the Ordos Basin indicate that S 1+S 2 reaches the maximum value at gas to fat coal stage, afterward the hydrocarbon generation potential weakens. The results of Py GC and thermal simulating experiment of coal fully prove that there exist three peaks of coal derived gas, the values of R o,m are corresponding to 0 5%～0 7%,1 0%～1 4% and 2 5% or so respectively. This shows that the coal derived gas is characterized by multistages generation. This discovery is helpful to the exploration and development of coal derived gas. Meanwhile, the characteristics of coal derived hydrocarbon regularly vary with increasing coal rank: isomerized hydrocarbons decrease, normal hydrocarbons increase, the distributions of isoprenoid alkanes are also variable or characterized by multistages evolution and the benzene compounds are characterized by fluctuating variation. |
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| Keywords: | coal derived gas thermal simulating experiment multistages gas generation coal derived hydrocarbon potential the Ordos Basin |
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