Reaction unit for imitating diagenetic process of sedimentary rock

Abstract

The invention discloses a reaction unit for imitating a diagenetic process of sedimentary rock. The reaction unit comprises an alloy kettle set and a sample chamber. The sample chamber is inserted and placed in the middle of a containing cavity, and the outer wall of the sample chamber is tightly matched with the cavity wall of the containing cavity. An upper pressing rod is inserted from the upper end of the containing cavity and abutted against two ends of the sample chamber, and a lower push rod is inserted from the lower end of the containing cavity and abutted against the two ends of the sample chamber. A sealing assembly comprises an upper sealing assembly and a lower sealing assembly. The upper sealing assembly is composed of a graphite annulus, a middle metal ring and an upper red copper ring, wherein the graphite annulus, the middle metal ring and the upper red copper ring are sequentially placed inside a clearance between the upper pressing rod and the alloy kettle set in a sleeved mode. The lower sealing assembly is composed of a lower red copper ring and a lower pressing ring, wherein the lower red copper ring and the lower pressing ring are sequentially placed inside a clearance between the lower push rod and the alloy kettle set in a sleeved mode, and the lower red copper ring and the lower pressing ring are pushed tightly on a skirt portion of the lower push rod through a lower sleeve and a compression bolt which are arranged on the lower end portion of the alloy kettle set. The reaction unit has the advantages of being high-temperature-resisting, high-pressure-resisting, weak-acid-base-fluid-resisting, good in sealing property, long in experimental time and easy to dismount, and experimental design demands are completely met.

Description

technical field [0001] The invention belongs to the field of petroleum exploration and development, and particularly relates to a reaction device for simulating the diagenetic process of sedimentary rocks. Background technique [0002] At present, in the field of petroleum exploration and development, in order to improve the level of reservoir quality evaluation and reservoir prediction technology, carry out quantitative evaluation of basin diagenetic fluid on clastic particle transformation, authigenic mineral formation and pore evolution distribution, and developed diagenetic physics simulation experiments. The system provides basic parameters for the quantitative characterization of the diagenetic evolution and pore evolution process of the reservoir, and the analysis of the genesis mechanism of the reservoir, and provides the theoretical basis for the reservoir evaluation and prediction and the distribution trend of the effective reservoir. To achieve the above goals, th...

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Problems solved by technology

[0003] However, the existing reactors will produce creep under the conditions of high temperature (600°C) and high pressure (350MPa), which will lead to micro-leakage of the cylinder body, poor sealing performance, and poor resistance to weak acid and alkali fluids

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