Experiment and digital-analog combined crude oil asphaltene precipitation research method

An asphaltene and combination technology, which is applied in the field of crude oil asphaltene precipitation research combined with experiments and numerical models, can solve problems such as the exploration of asphaltene precipitation laws, and achieve the effect of avoiding losses and reducing losses.

Pending Publication Date: 2022-06-17
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, this method only provides a device for measuring the amount of asphaltene deposition, and does not explore the law of asphaltene precipitation.

Method used

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  • Experiment and digital-analog combined crude oil asphaltene precipitation research method
  • Experiment and digital-analog combined crude oil asphaltene precipitation research method
  • Experiment and digital-analog combined crude oil asphaltene precipitation research method

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Experimental program
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Effect test

Embodiment

[0031] A research method of crude oil asphaltene precipitation combining experiment and numerical model, comprising the following steps:

[0032] (1) According to the crude oil composition and PVT data in the oil field, configure live oil to restore the crude oil under formation conditions, as shown in Table 1;

[0033] Table 1 Composition and proportion of live oil

[0034]

[0035]

[0036] (2) Set different temperatures and pressures, carry out the release and injection at each temperature and pressure, and simulate the asphaltene precipitation of crude oil under a certain temperature and pressure through a multi-stage filtration device, as shown in Table 2;

[0037] Table 2 Total precipitation of asphaltenes at different temperatures and pressures

[0038]

[0039]

[0040] (3) Repeat steps (1) and (2) to obtain multiple sets of data, and process the precipitated asphaltenes according to the industry standard NB / SH / T0509-2010 to obtain the total precipitation ...

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Abstract

The invention discloses an experiment and digital-analog combined crude oil asphaltene precipitation research method, which comprises the following steps of: designing a multi-stage filtering device through a high-temperature and high-pressure asphaltene precipitation physical experiment, and simulating asphaltene precipitation conditions of crude oil at different temperatures and pressures, so as to obtain the total precipitation amount of asphaltene; meanwhile, the particle size distribution rule of asphaltene is obtained; underground crude oil components are simulated through a CMG numerical model, and the precipitation law of asphaltene is predicted through phase equilibrium; and checking and correcting the CMG model by using a high-temperature and high-pressure asphaltene precipitation physical experiment result to obtain an accurate and complete asphaltene precipitation rule. The invention provides a research method which is more accurate and reliable and accords with the on-site actual asphaltene precipitation rule, and an asphaltene precipitation result is predicted for an oil field with high crude oil asphaltene content, so that the on-site production is reasonably guided, and the loss caused by the asphaltene precipitation problem is avoided and reduced.

Description

technical field [0001] The invention belongs to the technical field of oil and gas resource development, relates to a prediction method of asphaltene precipitation in crude oil production process, and particularly relates to a research method of crude oil asphaltene precipitation combining experiment and numerical model. Background technique [0002] The precipitation of crude oil asphaltenes is a major problem affecting the normal production of oilfields. The Shunbei Oil and Gas Field in the Tarim Basin has the problem that the precipitation of crude oil asphaltenes blocks the wellbore, which seriously affects the smooth production of oil wells. At present, the influencing factors and precipitation laws of asphaltene precipitation are not clearly understood, and corresponding prevention techniques are lacking. An accurate precipitation law research method is urgently needed to clarify the precipitation reasons and find out the precipitation laws. [0003] The current resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/28
CPCG01N33/2823
Inventor 赵海洋闫科举杨祖国刘磊任波李亮曹畅程仲富焦保雷范伟东邢钰孙桓丁保东杨小辉伍兴东
Owner CHINA PETROLEUM & CHEM CORP
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