| 被断裂破坏的盖层封闭能力评价方法及其应用 |
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| 引用本文： | 吕延防,万军,沙子萱,付晓飞,付广.被断裂破坏的盖层封闭能力评价方法及其应用[J].地质科学,2008,43(1):162-174. |
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| 作者姓名： | 吕延防 万军 沙子萱 付晓飞 付广 |
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| 作者单位： | 1. 大庆石油学院, 黑龙江大庆, 163318;2. 大庆油田有限责任公司采油一厂, 黑龙江大庆, 163000 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，教育部博士学位专项科研基金 |
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| 摘 要： | 断层对盖层的破坏主要表现为两个方面:一是减小了盖层的连续封盖面积,二是减小了盖层的厚度。盖层被断层破坏的主要影响因素有断层的断距、倾角和盖层厚度。通过对影响因素研究,提出了盖层有效断接厚度的新概念和计算方法。根据我国部分与断层有关的大-中型气田气柱高度资料,发现了有效断接厚度与所能封闭的最大气柱高度的对数线性关系,并由此提出了评价被断层破坏的盖层封闭能力的新方法。通过对库车坳陷库姆格列木群膏泥岩盖层的应用研究,所得结论与勘探实践完全吻合,证明所提出的评价方法是可行的。
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| 关 键 词： | 盖层 断层破坏 有效断接厚度 封闭能力 气柱高度 库车坳陷 |
| 文章编号： | 0563-5020（2008）01-162-13 |
| 收稿时间： | 2006-10-16 |
| 修稿时间： | 2007-07-05 |
Evaluation method for seal ability of cap rock destructed by faulting and its application |
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| Lü Yanfang,Wan Jun,Sha Zixuan,Fu Xiaofei,Fu Guang.Evaluation method for seal ability of cap rock destructed by faulting and its application[J].Chinese Journal of Geology,2008,43(1):162-174. |
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| Authors: | Lü Yanfang Wan Jun Sha Zixuan Fu Xiaofei Fu Guang |
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| Institution: | 1. Daqing Institute of Petroleum, Daqing, Heilongjiang 163318;2. No.1 Oil-Producting Fractory of Daqing Oilfield Company Ltd., Daqing, Heilongjiang 163000 |
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| Abstract: | There were two situations for cap rock destructed by faulting:one was reduce of successive distribution area of cap rock,another was reduce of thickness of cap rock.The main influencing factors of distribution of cap rock destructed by faulting were fault throw,dip angle and thickness of cap rock itself.A new concept,the effective juxtaposition thickness,was presented and discussed.By the study of influence factors,the logarithmic relation between effective juxtaposition thickness of cap rock destructed by fault and gas column height sealed by cap rock was found.Based on it,a new method evaluating seal ability of cap rock destructed by fault was established.Taking the gypsum-mudstone cap rock of the Kumugeliemu Group in the Kuqa Depression,Tarim Basin,as an example,the effective juxtaposition thickness was calculated and an isopleth map was drawn out.The results were well coincident with the exploration practice,which showed our new evaluation method should be useful and practical for oil-gas exploration. |
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| Keywords: | Cap rock Destruct of faulting Effective juxtaposition thickness Seal ability Gas column height The Kuqa Depression |
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