子波分解频谱技术在TY地区流体检测中的应用

Application of spectrum technology based on wavelet decomposition to fluid identification in TY area

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.

Well L has achieved major breakthroughs in Ordovician formation. TY area has become one of the hot spot. Experts have done a lot of research work about fluid identification by amplitude attributes in the study area. Their effects are not very perfectable. Aim to the problem, we identify the fluid using the method of time-frequency in this article. The fluid is the factor which influence the frequency attributes in the target sequences of the study area. The frequency attributes can reflect the fluid distribution characteristics of W Formation. By comparing various frequency attributes,Low frequency resonance and high frequency attenuation can reflect the fluid distribution characteristics of Upper W Formation. The single-frequency data volume of 25 Hz can effectively reflect the fluid distribution characteristics of the whole target interval. The oil-gas presents banded distribution along fault belt in the study area. The oil-gas is developed in the southeast of the study area. The prediction result is relatively consistent with the real drilling and the recognition of geology.