Deep well pitshaft wax-deposition analysis and testing device and analysis and testing method

Abstract

The invention belongs to the field of oil development and specifically relates to a deep well pitshaft wax-deposition analysis and testing device and an analysis and testing method. The device and the method are used for analyzing and testing wax-deposition in a deep well pitshaft under different conditions so as to summarize corresponding laws. The deep well pitshaft wax-deposition analysis and testing device comprises a testing vertical pitshaft string, an oil tank, a controllable thermostatic water bath and a recycling tank. The testing vertical pitshaft string provides a wax deposition environment; the oil tank provides preset crude oil; and the recycling tank recycles crude oil after wax deposition. The crude oil enters the testing vertical pitshaft string from the oil tank to undergo wax deposition, and the crude oil after wax deposition then enters the recycling tank to be recycled. The controllable thermostatic water bath adjusts temperature of the outside environment during the wax-deposition process. In comparison with the prior art, wax deposition on the inner wall of the deep well pitshaft under different conditions can be simulated in the invention.

Description

technical field

[0001] The invention belongs to the field of petroleum development, and in particular relates to a device and method for analyzing and testing wax deposition in deep-water well bores, which are used for analyzing and testing wax deposition in deep-water well bores under different conditions, thereby summarizing and inducing corresponding laws. Background technique

[0002] When exploring and developing oil fields, wax deposition in the wellbore is often encountered. When crude oil is extracted from the formation to the surface, dissolved gas will escape and expand, resulting in a gradual decrease in temperature, and the wax in the crude oil will gradually crystallize and precipitate, agglomerating into blocks, and piled up on the inner wall of the wellbore, blocking the wellbore, resulting in a decrease in oil well production Even discontinued. From the perspective of energy, according to the principle of minimum energy consumption, the precipitated paraffin...

Examples

Embodiment Construction

[0017] Such as figure 1 As shown, the deep-water wellbore wax analysis test device includes: test straight pipe string 1, oil tank 2, controllable constant temperature water bath box 3, recovery tank 11; test straight pipe string 1 provides a wax deposition environment, and oil tank 2 provides a preset Crude oil, the recovery tank 11 reclaims the crude oil after waxing, the crude oil enters the test straight-through pipe column 1 from the oil tank 2 to form wax, and then enters the recovery tank 11 for recovery, and the controllable constant temperature water bath box 3 regulates the temperature of the outside during the waxing process. temperature.

[0018] Among them, the test straight pipe string 1 is an upright pipe string with closed upper and lower ends, the lower end is an oil inlet, and the upper end is an oil outlet, which can simulate a wellbore in a deep water environment and provide a wax deposition environment.

[0019] The oil tank 2 is connected to the oil inle...

technical field

[0001] The invention belongs to the field of petroleum development, and in particular relates to a device and method for analyzing and testing wax deposition in deep-water well bores, which are used for analyzing and testing wax deposition in deep-water well bores under different conditions, thereby summarizing and inducing corresponding laws. Background technique

[0002] When exploring and developing oil fields, wax deposition in the wellbore is often encountered. When crude oil is extracted from the formation to the surface, dissolved gas will escape and expand, resulting in a gradual decrease in temperature, and the wax in the crude oil will gradually crystallize and precipitate, agglomerating into blocks, and piled up on the inner wall of the wellbore, blocking the wellbore, resulting in a decrease in oil well production Even discontinued. From the perspective of energy, according to the principle of minimum energy consumption, the precipitated paraffin...

Examples

Embodiment Construction

[0017] Such as figure 1 As shown, the deep-water wellbore wax analysis test device includes: test straight pipe string 1, oil tank 2, controllable constant temperature water bath box 3, recovery tank 11; test straight pipe string 1 provides a wax deposition environment, and oil tank 2 provides a preset Crude oil, the recovery tank 11 reclaims the crude oil after waxing, the crude oil enters the test straight-through pipe column 1 from the oil tank 2 to form wax, and then enters the recovery tank 11 for recovery, and the controllable constant temperature water bath box 3 regulates the temperature of the outside during the waxing process. temperature.

[0018] Among them, the test straight pipe string 1 is an upright pipe string with closed upper and lower ends, the lower end is an oil inlet, and the upper end is an oil outlet, which can simulate a wellbore in a deep water environment and provide a wax deposition environment.

[0019] The oil tank 2 is connected to the oil inle...

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