地球物理技术在非常规勘探中的应用——以涪陵页岩气田为例

Application of Geophysical Technology in Unconventional Exploration——Taking Fuling Shale Gas Field as an Example

本文介绍在涪陵页岩气田勘探开发过程中建立的一套整合TOC定量预测,脆性指数计算和优质泥页岩检测模板的地球物理技术:(1)通过将岩心TOC曲线与多种测井曲线交汇,确定密度为TOC最敏感参数,从而通过叠前密度反演实现TOC定量预测;(2)结合区域地质条件,结合多个岩石力学参数,建立更适合在本区应用的新脆性指数计算公式;(3)利用TOC,脆性和孔隙度三个参数,建立能快速识别该套页岩层系优质泥页岩的检测模板。该地球物理整合技术为涪陵页岩气田的勘探开发提供了强有力的技术支撑。

This paper describes a set of integrated TOC quantitative prediction, brittleness index calculation and geophysi- cal techniques for high - quality shale detection templates established in the exploration and development process of the shale gas field in Fuling： （ 1 ） Through the core TOC curve and various well logs The curve meets to determine the density as the most sensitive parameter of TOC, so as to realize TOC quantitative prediction through prestack density inversion. （2） Combi- ning regional geological conditions and combining multiple rock mechanics parameters, establish a new brittleness index that is more suitable for application in this area. Formula; （ 3 ） Using TOC, brittleness and porosity parameters to establish a tem- plate for rapid identification of the shale layer high quality shale. The geophysical integration technology provides strong techni- cal support for the exploration and development of the Fuling shale gas field.