区域性泥岩盖层阻止油气沿输导断裂运移机制及其判别方法

依据区域性泥岩盖层内断裂发育特征与油气沿断裂运移的关系和所需条件分析,对盖层阻止油气沿输导断裂运移机制进行研究,通过断接厚度与断裂上下不连接所需的相对最小断接厚度比较,建立一套区域性泥岩盖层阻止油气沿断裂运移的判别方法,并将其应用于南堡凹陷东二段相关研究中。结果表明：区域性泥岩盖层阻止油气沿输导断裂向上运移的机制是断裂在其内上下不连接,不能成为油气输导通道;形成条件是盖层断接厚度大于最小断接厚度;南堡凹陷东二段区域性泥岩盖层能够阻止下伏沙三段或沙一段源岩生成的天然气沿输导断裂向上运移的区域主要分布在凹陷西部,少量分布在凹陷东部局部地区,与目前的天然气分布相吻合,新方法可以用于判别区域性泥岩盖层...

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Bibliographic Details
Published in中国石油大学学报（自然科学版） Vol. 40; no. 3; pp. 36 - 43
Main Author 付广 张博为 吴伟
Format Journal Article
LanguageChinese
Published 东北石油大学地球科学学院,黑龙江大庆,163318 2016
Subjects
判别方法
封闭机制
油气
泥岩盖层
活动时期
输导断裂
oil and gas
输导断裂
判别方法
油气
sealing mechanism
judgement method
泥岩盖层
封闭机制
transporting fault
活动时期
mudstone caprock
active period
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ISSN1673-5005
DOI10.3969/j.issn.1673-5005.2016.03.005

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Summary:依据区域性泥岩盖层内断裂发育特征与油气沿断裂运移的关系和所需条件分析,对盖层阻止油气沿输导断裂运移机制进行研究,通过断接厚度与断裂上下不连接所需的相对最小断接厚度比较,建立一套区域性泥岩盖层阻止油气沿断裂运移的判别方法,并将其应用于南堡凹陷东二段相关研究中。结果表明：区域性泥岩盖层阻止油气沿输导断裂向上运移的机制是断裂在其内上下不连接,不能成为油气输导通道;形成条件是盖层断接厚度大于最小断接厚度;南堡凹陷东二段区域性泥岩盖层能够阻止下伏沙三段或沙一段源岩生成的天然气沿输导断裂向上运移的区域主要分布在凹陷西部,少量分布在凹陷东部局部地区,与目前的天然气分布相吻合,新方法可以用于判别区域性泥岩盖层能否阻止油气沿输导断裂运移。
Bibliography:mudstone caproek ; transporting fault ; active period ; oil and gas ; sealing mechanism ; judgement method
FU Guang, ZHANG Bowei, WU Wei （ College of Earth Sciences, Northeast Petroleum University, Daqing 163318, China）
The mechanism and its detection of mudstone caprock sealing oil and gas migration along transporting fault were studied by analyzing the relation between the fault growth in regional mudstone caprock and oil and gas migration along trans- porting fault, and the required conditions. Through comparison of fault connecting thickness and the minimum thickness that upper and lower fault cannot connected, a detecting method of regional mudstone caprock sealing oil and gas migration along fault was determined, and was applied to the second member of Dongying Formation in Nanpu Depression. It is found that the condition of active regional mudstone caprock sealing oil and gas migration along fault is that the upper and lower fault cannot be connected, therefore allows a transporting passage of oil and ga
ISSN:1673-5005
DOI:10.3969/j.issn.1673-5005.2016.03.005