摘要
在油气盆地内微尺度反射地震波场的成因与勘探最终目标——小尺度油气-水界面有密切联系。微尺度地震波场的属性中隐藏着识别油气藏的密码。有油气水界面时其地震波场会在局部产生非常规变异,使小尺度波场的奇异性急剧增高,这就为油气圈闭的地球物理评价提供了基础。这类信息在地震剖面上基本上不可见,根据反射地震波场信息学的理论发掘由油气藏或流体发出的波场信息,讨论评价圈闭的方法技术体系。已知油田试验表明,上述评价圈闭的方法技术是有效的。建议在投入成本高昂的深层钻探之前,首先进行圈闭评价,以减少风险,提高发现新的大型油气田的成功率。
The genesis and ultimate exploration target of micro-size reflected seismic wavefield——small size of oil,gas and water interface were close related in the oil and gas basin.Cipher codes for identifying hydrocarbon reservoirs were hidden in the attribute of the wavefield.In the existence of oil,gas and water interface,an unconventional degeneration would be induced locally,the strangeness of small size wavefield was raised sharply,by which a basis was provided for the geophysical evaluation of oil and gas traps.This kind of information was basically unseen.According to the theory of information science of reflected seismic wavefield,of which the wavefield information was developed by the hydrocarbon reservoirs or fluid.The methodological system for evaluating the traps was discussed.The known experiments from oilfields indicate that the method used for evaluation is feasible and effective.It is proposed that before the deep drilling of high cost,a trap evaluation is carried out first to reduce risk and raise the success rate of development of newly found big oil and gas fields.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2009年第6期1-10,共10页
Journal of Oil and Gas Technology
关键词
油气勘探
圈闭评价
地震波场
微尺度
奇异性
oil and gas exploration
trap evaluation
seismic wavefield
micro-size
strangeness
