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随着L井在奥陶系取得重大突破,TY地区成为了研究热点地区,研究人员在该区储层流体检测方面开展了一定的研究工作,但主要集中在振幅类属性流体检测方面,并且效果不是很好.为此本文利用时频分析方法来开展流体检测研究,通过研究认为影响研究区目的层频率类属性的因素为流体,频率类属性可以反映研究区W组地层的流体分布特征,各种频率类属性对比发现,低频增加和高频衰减属性可以反映研究区W组上部地层的流体(油气)分布状况.25 Hz的单频体可以比较有效的反映研究区整个目的层的流体分布特征.综合低频增加、高频衰减及单频属性认为,油气整体上沿断裂带呈条带状分布,研究区东南部油气相对比较发育,利用本文方法得到的流体检测结果与该区钻井情况和地质认识也是比较吻合的.
As the L well made major breakthroughs in the Ordovician, the TY region has become a hot spot for research. Researchers have done some research work on reservoir fluid detection in this area, but mainly focused on the amplitude-based fluid detection and the results This paper uses the time-frequency analysis method to carry out the fluid detection research. By studying the factors that affect the frequency class attribute of the target layer in the study area, the fluid type and frequency class attribute can reflect the fluid distribution characteristics of the W group strata in the study area. It is found that the distribution of low frequency and high frequency attenuation reflect the fluid (oil and gas) distribution in the upper strata of Group W. The single frequency of 25 Hz can reflect the fluid distribution characteristics of the whole target formation more effectively Combining with the increase of low frequency, the attenuation of high frequency and the characteristics of single frequency, it is considered that the distribution of oil and gas along the fault zone is striplike, and the hydrocarbon in the southeastern part of the study area is relatively developed. The fluid detection results obtained by this method are in good agreement with the drilling conditions and geology Understanding is more consistent.