弹性波阻抗反演在碳酸盐岩流体检测中的应用

APPLICATION OF ELASTIC WAVE IMPEDANCE INVERSION IN THE FLUIDS DETECTION OF CARBONATE RESERVOIRS

弹性波阻抗是声阻抗的概念延伸，它包含了更为丰富的储层岩性和含流体信息，并逐步发展成为一种有效的流体检测与识别技术。在简介弹性波阻抗的概念、方法原理、流程的基础上，以塔里木盆地塔中5-7井区下奥陶统鹰山组储层为例，开展了单井弹性波阻抗模型正演分析和弹性波阻抗反演，并进行了气、水识别研究，对弹性波阻抗反演在碳酸盐岩储层流体检测中的应用进行了探索性研究。实践证明，弹性波阻抗反演可用于研究区碳酸盐岩储层的气、水识别，流体预测结果与钻探结果吻合，表明该技术思路具有较好的应用前景。

The impedance is the extended concept of acoustic impedance, which includes more rich informations of reservoir lithologies and fluids, and furthermore it＇s gradually developed and become an effective fluid detecting and recognizing technique. On the bases of the brief introductions of the concept, methods, principles and flow sheet, taking Lower Ordovician Yingshan Formation reservoirs in Tazhong 5-7 Well Block of Tarim Basin as example, the forward analysis and inversion of the elastic wave impedance for the individual well are conducted, and moreover the recognizing studies on the gas and water are caught out. In addition, the exploring researches on the application of the above inversion in the fluid detection of carbonate reservoirs are engaged. The practice shows that the inver- sion can be adopted in the gas and water recognitions in carbonate reservoirs and furthermore the above predicted results are coincident with the those of drilling and exploration. In the end, the technic thought of the technique is proven to possess much better application prospect.