Tight Sandstone Rock Physical Characteristics Research Of Zhenzhuchong And Xusiduan In Northeast Sichuan

In northeast sichuan, zhenzhuchong and xusiduan are good tight sandstone reservoirs, theyhave good prospects for economic value. But at present, the influence mechanism of the tightsandstone layer is still not well know, with the tools of rock physics people wish to give areasonable explanation and reference. Based on the core sample preparation, using the method ofpulse through the sample and measured acoustic velocity in different reservoir condition,conclusion that for zhenzhuchong and xusiduan tight sandstone, the size of the porosity is not thedominant factors influencing the speed. Using the aspect ratio of pore space we can be dividedinto two kinds of compliment pore and stiff pore, single and double porosity rock physical chart,show that double hole model is more suitable for tight sandstone, at the same time, according tothe linear fitting method, the fitting of a relation between pressure and speed, and show themeaning of the fitting parameters and its physical significance. As for lack of shear wave loggingdata,by use of double hole model,it also provides reference for shear wave forecast...