改进型随机斑块饱和模型及其在致密气层检测中的应用  

Modified continuous random patchy-saturation model in tight gas detection

作　　者：未晛 杨志芳[1] 晏信飞[1] 卢明辉[1] 李晓明[1] 任岩[1] Wei Xian;Yang Zhifang;Yan Xinfei;Lu Minghui;Li Xiaoming;Ren Yan(Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China.;geiiing Vocational College of Labour and Social Security,Beijing 100083,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]北京劳动保障职业学院,北京100083

出　　处：《石油地球物理勘探》2018年第6期1227-1234,I0005,共9页Oil Geophysical Prospecting

基　　金：中国石油天然气集团公司"十三.五"项目"深层与非常规物探新方法新技术"(2016A-3301);国家"973"项目"致密油层地球物理评价"(2014CB239006)联合资助

摘　　要：致密砂岩储层中气、水的非均匀分布使地震弹性参数与储层参数间的关系变得复杂,导致定量解释多解性增强。针对致密砂岩储层复杂孔隙流体分布特点,改进了随机斑块饱和模型,改进后的模型可以更准确模拟岩石物性、孔隙流体等对地震波弹性参数的影响。基于改进型随机斑块饱和模型形成了多尺度岩石物理模板,经超声尺度、测井尺度和地震尺度地球物理数据标定后,应用于四川致密气层检测,预测的孔隙度、含气饱和度与试气结果较为一致。The heterogeneous distribution of gas and water in tight-sand,gas reservoirs may cause complex relationships between elastic and reservoir parameters,which results in strong uncertainty in the quantitative seismic interpretation.According to characteristics of complex fluid distribution in tight-sand gas reservoirs,we modify the continuous random patchy-saturation model.This modified model can well investigate the influence of petrophysical properties and pore fluids on wave responses.A multi-scale rock physical template is established based on the modified model,and is calibrated by seismic-,logging-,and ultrasonic-scale data. The multi-scale rock physics template is applied to the tight-gas reservoir prediction in Sichuan Province.The quantitative estimation of rock porosity and gas saturation matoches very well with well gas production tests.

关 键 词：岩石物理模型 斑块饱和模型 多尺度岩石物理模板 孔隙度预测 气层识别 

分 类 号：P631[天文地球—地质矿产勘探]