录井评价技术在吐哈山前带致密砂岩气藏的应用

Application of Logging Evaluation Technologies in Tight Sand Hydrocarbon Reservoir of Tuha Basin Piedmont Zone

致密砂岩气储层孔隙度低、渗透率低、随钻录井气测显示弱、气水关系复杂等特征给录井解释评价带来诸多技术难题。为解决油气发现、含油丰度及储层物性评价等问题，在山前带开展了录井技术适应性分析研究。在分析大量实钻录井统计资料基础上，指出致密砂岩储层特征及评价难点，应用核磁共振技术对储层物性进行评价，确立轻烃录井油气水层解释评价方法，用三维定量荧光技术和录井评价技术对致密砂岩气藏做出更具适应性的评价。

Tight sandstone gas reservoir brought logging interpretation and evaluation a series of technical challenges with the characteristics of low porosity, low permeability, low TG measurement display while drilling, complex relation- ship of gas ＆water, etc.On the purpose of exclusive the needs of discover oil and gas,oil abundance and reservoir proper- ties evaluation, some analysis of adaptability to logging technology are carried out in Tttha piedmont zone.Based on anal- ysis lots of logging statistics data,the characterize and evaluation difficulties of tight sandstone gas reservoirs are indicat- ed.Evaluating reservoir＇ s properties by using nuclear magnetic resonance technique,identified light hydrocarbon logging interpretation and evaluation methods. By using three-dimensional quantitative fluorescence technique and logging eval- uation technique to make more adaptive evaluation for tight sandstone gas reservoir.The author recommended use log- ging supporting technology of comprehensive logging（fast chromatography）,3D quantitative fluorescence,light hydrocar- bons,MRI,core scanning,conventional geology, remote transmission. This paper mentions logging interpretation and eval- uation methods for tight sandstone gas,and systematically surrunarizes the application of some logging technologies.It ac- cumulated some technical experiences for the following logging evaluation of tight sandstone gas reservoir in this area.