Multi-parameter high-temperature high-pressure major diameter rock core holder

Abstract

The invention provides a major diameter rock core holder for realizing multi-parameter measurement under high-temperature and high-pressure conditions. The rock core holder comprises an annular space, a rock core chamber, measuring electrodes, a heating and pressurizing device, an external connection measuring device, a temperature controller and a high-pressure constant speed pump, wherein the annular space is formed by a cylinder body, a glue cylinder, an upper plug and a lower plug. The holder has the characteristics of good high-pressure and high-temperature resistance, no pollution, simple design, convenient operation, simultaneous measurement of multiple parameters, and stable and accurate test result, and can realize measurement of the permeability, the sound wave and the stratum factor at a highest temperature of 150DEG C under a maximum pressure of 70Mpa, and experiment analysis measurement of the saturation index, the multiphase flow displacement and other rock physical parameters through a gas driving method or a semi-permeable separator plate method.

Description

technical field [0001] The invention relates to the field of analysis devices for rock core materials in geological exploration and development, and is suitable for measuring various physical parameters of large-diameter rock cores under simulated reservoir conditions and carrying out experimental analysis and research on large-diameter rock cores. Background technique [0002] With the deepening of oil and gas exploration and the advancement of exploration technology, heterogeneous reservoirs have become the target horizons of oil and gas exploration. The reservoirs have the characteristics of complex lithology, physical properties, pore structure, and strong heterogeneity. For these heterogeneous reservoirs, the experimental results of standard rock samples (2.5 cm in diameter) become less representative, while large-diameter core experiments can more effectively reflect the geophysical properties of heterogeneous reservoirs. [0003] As the basic equipment for core analys...

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Problems solved by technology

[0003] As the basic equipment for core analysis and research under reservoir conditions, the core holder is mainly composed of a cylinder, a rubber cylinder, a plugging head and a measuring electrode. The inner diameter of the plugging head and the cylinder is small and can only meet standard rock samples ( The use of cores with a diameter of 2.5cm) is useless for the analysis and research of large-diameter cores (9cm in diameter); and this type of holder is only limited to the measurement of core resistivity at normal temperature and pressure, and has the disadvantages of single measurement parameters and limited test conditions. There are certain limitations in providing parameters for evaluation of heterogeneous formations

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