利用偶极声波测井进行储层压裂效果评价

对地层进行压裂形成人工裂缝来提高油气产量,是开发低渗透油气藏最常用的手段。压裂裂缝在储层的纵向上的延伸对试油气结果往往起着决定性作用,但是对于压裂裂缝的检测尚未形成有效的方法。偶极声波测井一般用于裸眼井测量来评价地层的各向异性、识别气层等。在分析偶极声波测井原理的基础上,将偶极声波测井在套管里进行测量,来检查压裂裂缝延伸高度,指导试油气结果的分析,在正确认识储层中取得了良好的应用效果,证明了该技术是一项有效的压裂效果评价方法,同时也拓宽了测井资料在工程检测方面的应用。

Evaluation on Fracturing Effect of Reservoirs Based on Dipole Sonic Logging

Formation fracturing is the most common way to develop low-permeability oil and gas reservoirs so as to increase oil and gas output. The vertical extension of fractured fractures in reservoirs determines the formation testing results. However, no effective method has been found to examine fractured fractures. Generally speaking, dipole sonic logging is applied in measuring open-hole wells to evaluate formation anisotropy and identify gas zones. On the basis of analyzing the dipole sonic logging mechanism, dipole sonic logging is conducted in casing to examine the expanded height of fractured fractures and to guide the analysis of formation testing results. Good application results have been obtained from correctly identifying reservoirs. The new technique is proved to be an effective way to evaluate fractured results. What's more, it allows more application of logging data to engineering examination.