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A multifunctional high temperature and high pressure simulation experiment device for hydrocarbon and diagenetic diagenesis and its application method

A simulated experimental device, high temperature and high pressure technology, applied in the direction of material inspection, soil material testing, etc., can solve the problems of failure to realize fluid migration and reaction, low experimental efficiency, etc.

Inactive Publication Date: 2021-04-06
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] On the whole, the existing technology has realized the simulation of the impact of various diagenetic fluids on rock diagenesis (such as acid diagenesis, alkaline diagenesis, dissolution, etc.) when they are in dynamic and static contact with rocks under high temperature and high pressure conditions, but there are still the following problems : ① Most of them are fluids with specific components (CO 2 、H 2 S aqueous solution) interacts with rocks. In fact, source rocks are in different stages of hydrocarbon evolution, and their pore fluids are formation water, oil, natural gas, and other products associated with oil and gas generation (such as CO 2 , organic acid, etc.); ②The experiments carried out are still in the reaction between the fluid and the rock surface, and the dissolution experiment of fluid migration and reaction in the internal pores of the rock has not been realized; ③The experimental device can only carry out Single rock-fluid interaction, experimental efficiency is not high
[0011] More importantly, the two research fields discussed above are similar in themselves, and both belong to the high-temperature and high-pressure simulation experiment technology. In addition to the above-mentioned problems, the simulation of geological processes in one research field can only be realized. If a multifunctional high-temperature and high-pressure simulation experimental device can be designed to satisfy the simulation of geological processes in the above two fields at the same time, it will help to improve the application effect of the experimental device. Improving technical support for unconventional oil and gas exploration and development

Method used

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  • A multifunctional high temperature and high pressure simulation experiment device for hydrocarbon and diagenetic diagenesis and its application method
  • A multifunctional high temperature and high pressure simulation experiment device for hydrocarbon and diagenetic diagenesis and its application method
  • A multifunctional high temperature and high pressure simulation experiment device for hydrocarbon and diagenetic diagenesis and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0143] Example 1 Simulation experiment of conventional and unconventional natural gas generation in source rocks of Longmaxi Formation

[0144] 1 Sample preparation and preparation

[0145] Select core samples or outcrop samples of immature or low-mature source rock samples similar to the source rock depositional environment, organic matter type, and organic matter abundance in the study area, with Ro ≤ 0.6%, and sample weight ≥ 500g. And select some small pieces of immature and low-mature coal standard samples, Ro≤0.6%. Since the source rocks of the Longmaxi Formation in my country have generally entered the high-over-mature stage, and the types of organic matter are mainly type I-II1, the low-mature source rocks of the Devonian in Luquan, Yunnan were selected as Ro=0.48%, TOC=5.24% . In addition, uncooked Jurassic coal in Cuijiazhai, Hebei Province was selected as the coal standard sample, Ro=0.50%.

[0146] Considering the heterogeneity of the source rock, the sample was ...

Embodiment 2

[0174] Example 2 Simulation experiment on the effect of hydrocarbon-generating fluids of Xujiahe Formation coal-measure source rocks in western Sichuan on feldspar-quartz sandstone reservoirs

[0175] 1 Sample preparation and preparation

[0176] The low-mature coal of the Xujiahe Formation in western Sichuan was selected as the parent rock providing coal-measure source rock = fluid, the sample number is PZ-9-1, the organic carbon content is 67.85%, and the Ro is 0.60%. The core consists of one piece of feldspar sandstone, with a porosity of 21.51% and a permeability of 60.1md. The interaction between hydrocarbon source fluid and reservoir is simulated when Ro=2.0% at the peak of oil generation. The coal PZ-9-1 sample was crushed to 20 mesh, mixed thoroughly, shrunk into several parts, and a small part was taken for each simulated temperature point to be pressed into a small cylindrical core to ensure the uniformity and representativeness of the sample. In addition, uncooked...

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Abstract

The present invention relates to a multi-functional hydrocarbon-forming diagenetic high-temperature and high-pressure simulation experiment device and its use method, including hydrocarbon source rock hydrocarbon generation reaction and fluid generation system, auxiliary system, hydrocarbon expulsion reaction and hydrocarbon source fluid transfer system, hydrocarbon source fluid-rock interaction The action system and the product separation and collection system release the fluid from the source rock hydrocarbon generation reaction and fluid generation system into the hydrocarbon expulsion reaction and source fluid transfer system, and then inject the source fluid into the reservoir rock sample in the core holder, Start the heating and pressurizing device to make the fluid-rock react under the set temperature, pressure and time. The invention can not only simulate the linkage and co-controlled dynamic evolution process of hydrocarbon generation and hydrocarbon expulsion of source rocks, determine the generation capacity of conventional natural gas and shale gas in different evolution stages of source rocks, but also simulate the generation of source fluids and their impact on reservoir diagenesis The effect affects the integrated geological process; it satisfies the simulation of two geological processes of hydrocarbon formation and diagenesis, and improves the application field and efficiency of the experimental device.

Description

technical field [0001] The invention relates to a physical simulation experiment device in the field of petroleum geology research, in particular to a device for simulating the formation and evolution of shale gas under high temperature and high pressure conditions by means of electronic machinery and automatic control technology, and the interaction simulation of hydrocarbon source fluid-reservoir rock Experimental apparatus and method of use. Background technique [0002] In petroleum geology, physical simulation experiments, as a special means, run through all links of basin formation, hydrocarbon formation, and accumulation, and play a very important role in deepening the process of oil and gas generation, expulsion, migration, and accumulation. [0003] In terms of hydrocarbon generation, the most widely used is the source rock thermal pressure hydrocarbon generation and expulsion simulation experimental device, the most fundamental theoretical basis of which is that th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 谭静强马中良
Owner CENT SOUTH UNIV
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