Study On The Rock Physics And Reservoir Parameters Based On The AutoScan-Ⅱ Platform

Untraditional reservoirs hold a large proportion worldwide and contain much oil. As the energy shortage becomes more serious, untraditional reservoirs are very important for maintaining and increasing oil and gas production in the oilfields. Therefore, rock physics experiments researches are carried out to establish applicable rock physics models which can provide reliable theoretical basis for seismic exploration and development of an oil and gas Field. The study has great practical and social significance.Based on the previous study, this paper elaborates on the usage of rock experiment and experimental data statistics and analysis under the guidance of rock physics theory to study the rock physical properties of shale, sandstone, dolomite and basalt. The study mainly covers rock physical experiment designing, data analysis, and relationship between physical properties and elastic parameters.1、According to the research purposes, the rock physical experiments have been designed as follows:①Rock samples were included core and box.②Physical parameters experiment, including porosity, permeability and density tests, the porosity was tested by drainage method,permeability was tested by AutoScan-Ⅱ,which was made in NER.③Rock electrical parameters experiment, mainly testing the resistivity on condition that rock is saturated100%by35000ppm Nacl.④Elastic parameters experiments, testing P wave and S wave velocity on condition that rock is under room temperature and atmospheric pressure, dry and saturated water. The detailed experimental data have been got through the above process, and which are foundation of rock physical analysis later.2、According to the experiment data, the rock physical characteristics of shale, sandstone, dolomite and basalt have been researched further.①The regional empirical formula have been got through experiment data(physical parameters, electrical parameters, acoustic velocity), which includes porosity versus density, density versus P wave and S wave velocity, resistivity versus permeability, and other parameters relationship.②The influence of fluid to rock elastic characteristic is analyzed.③A new equation can be derived to calculate permeability with the resistivity of shale and was verified by the measurement results of AutoScan-Ⅱ platform.④Analysis the ability to identify the crack with physical parameters, electrical parameters and acoustic velocity of shale, sandstone, dolomite and basalt3、In order to probe on basis of shale’s fluid detection from seismic data, in the research area, fluid sensitivity comparative analysis of rock elastic parameter was carried out creatively. Based on the compress ional and shear wave velocity and density measurements, the rock elastic parameters such as velocity ratio y, Poisson ratio σ, compress ional wave impedance Zp, shear wave impedance Zs, the difference between Zp and Zs, shear modulus μ, bulk modulus K, the modulus difference between K and μ, Lame coefficient λ and λρ were calculated. Quantitatively analysis was made to compare the relative change scopes of every elastic parameter to distinguish "water/gas","water/oil" and "gas/oil" boundary.