碳酸盐岩地层反射结构分析与储层预测

Analysis on reflection structure and reservoir forecast in the carbonate stratum.

中国石油化工股份有限公司石油勘探开发研究院南京石油物探研究所 江苏南京210014

Institute of Geophysical Prospecting,Research Institute of Petroleum Exploration and Development,SINOPEC,Nanjing 210014,China

碳酸盐岩储集体主要由孔、缝、洞组成,非均质性强,地震资料的品质不高,孔、缝、洞在地震资料上的特征不直观,很难直接识别。为此,采用薄层谱分解技术对塔河地区碳酸盐岩储层进行了识别和预测。给出了薄层谱分解技术的基本原理,分析了碳酸盐岩地层的反射特征,探讨了利用薄层谱分解技术进行碳酸盐岩地层反射特征分析与储层预测的可能性。利用薄层谱分解技术获得了反映地层岩体变化的相位谱和振幅谱剖面,分析了孔、缝、洞等地质现象在谱资料上的表现特征,结合钻井、测井资料研究了特定频率下孔隙发育程度与反射特征之间的关系,将塔河油田碳酸盐岩储层划分为4种储层类型,并分别进行了储层描述。

The carbonate reservoir is making up of pore,cranny and cave.The heterogeneity is strong.The quality of seis- mic data is not good.The character is not intuition,it is hard to identify on the seismic data.So using thin bed spec- tral decomposition technology for identification and forecas- ting of Tahe carbonate reservoir.The paper presented the principle about thin bed spectral decomposition technology. Analyzed on the reflection feature of carbonate stratum. Then discussed the possibility of carbonate stratum reflec- tion analysis and reservoir forecast by thin bed spectral de- composition technology.The section of phase spectrum and amplitude spectrum reflecting stratum body variety was gained by this technology.The representative character of pore,cranny and cave in the spectral data was analyzed. Combining the drilling and logging data,the relationship between pore develop degree and reflection character on special frequency was studied.Tahe oilfield is divided into four reservoir types,which were described respectively.