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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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烃类微渗漏与宏渗漏的识别及镇巴长岭—龙王沟地区勘探实践
Keywords: 轻烃,微渗漏,宏渗漏,微生物勘探,酸解烃,四川盆地,镇巴区块
Abstract:
？？？？？？？？烃类微渗漏与宏渗漏的识别可提高化探异常解释的正确性，对识别标志研究现状进行了综合分析，表明微生物、罐顶气、酸解烃、土壤气对2类渗漏有不同响应。宏渗漏多具有微生物及烃检测异常指标呈线状分布、烃浓度高、c6+多、烷烃/烯烃值高的特征；而微渗漏多具有微生物异常指标呈散乱分布、烃浓度低、几乎无c6+、烷烃/烯烃值低的特征。对四川盆地南大巴山冲断褶皱带内的镇巴区块长岭—龙王沟地区展开研究，表明龙王沟异常带具有土壤丁烷氧化菌及酸解烃c1—c4异常点线状分布、c1—c4浓度高（>1000×10-6）、乙烷/乙烯值高（>10）的特征，为宏渗漏，与下伏油气藏可能不垂直对应；长岭复向斜异常带具有土壤丁烷氧化菌异常点散乱分布、c1—c4浓度低（<100×10-6）、乙烷/乙烯值低（<5）的特征，为微渗漏，与下伏油气藏垂直对应。
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