High-temperature-resistant rock core holder and rock core pulse attenuation gas permeability testing system thereof
A technology of rock core holder and high temperature resistance, which is applied in the mechanical field, can solve the problems of not considering the influence of temperature, permeability error, deformation, etc., and achieve the effects of ensuring measurement accuracy, good sealing, and compensating for low temperature resistance
Inactive Publication Date: 2021-04-09
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology
However, the temperature resistance limit of the rubber material is only 180°C, and it is prone to melting and deformation at high temperatures, which cannot guarantee good air tightness, and there are serious safety risks, which is not feasible for measuring the permeability of rock cores at high temperatures
[0004] At the same time, the working temperature of the conventional rock core permeability tester is room temperature, the influence of temperature is not considered in the permeability calculation, and there are errors in the permeability measured at high temperature
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[0036] In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0037] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening another element may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or it may b...
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The invention relates to a rock core holder and a rock core pulse attenuation gas permeability test system thereof, and the rock core holder and the rock core pulse attenuation gas permeability test system can guarantee the measurement precision of rock core permeability at a high temperature by correcting a temperature item in a permeability fitting algorithm. The rock core pulse attenuation gas permeability test system comprises the rock core holder; a gas source mechanism which is communicated with an upstream gas source input interface of the rock core holder; a confining pressure input mechanism which is communicated with an inlet of a confining pressure pump of the rock core holder; a pressure sensor which is connected with the air source mechanism; a temperature acquisition and control device which is connected with the ceramic heater of the rock core holder and the temperature measurement part; and a pulse attenuation gas permeability test unit which is connected with the pressure sensor and the temperature acquisition and control device.
Description
technical field [0001] The invention belongs to the technical field of machinery, and relates to a core pulse decay gas permeability testing system, in particular to a high temperature resistant rock core holder and a system for realizing tight rock core permeability measurement under high temperature conditions. Background technique [0002] The process of thermal oil recovery from reservoirs is usually accompanied by dynamic changes of microstructures such as pores and fractures. The high temperature generated by heat injection or in-situ combustion will cause a series of complex physical and chemical reactions such as pore water evaporation, pore pressure increase, mineral thermal expansion, mineral phase transition, mineral thermal decomposition, etc., resulting in the formation and blockage of pores and the expansion of cracks. and closure, eventually leading to dramatic changes in reservoir permeability. Especially for tight oil reservoirs with ultra-low permeability ...
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IPC IPC(8): G01N15/08
CPCG01N15/0806G01N15/0826
Inventor 韦自健盛家平
Owner CHINA UNIV OF PETROLEUM (BEIJING)