Method for conducting numerical simulation on water-soluble viscosity reducer flooding of common thickened oil

A numerical simulation, water-soluble technology, applied in earth-moving drilling, production of fluids, wellbore/well components, etc., can solve problems such as restricting development, inability to obtain reservoir engineering design, etc., achieving less parameter requirements, strong practicability, good operability

Active Publication Date: 2020-01-10
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

At present, only laboratory experiments and a small number of industrial tests have achieved good recovery factors, and they have not been widely used, mainly because the reservoir numerical simulation method of water-soluble viscosity reducer has not been established, and the reservoir engineering of this technology cannot be obtained. design, thus limiting the development of the technology

Method used

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  • Method for conducting numerical simulation on water-soluble viscosity reducer flooding of common thickened oil
  • Method for conducting numerical simulation on water-soluble viscosity reducer flooding of common thickened oil
  • Method for conducting numerical simulation on water-soluble viscosity reducer flooding of common thickened oil

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Experimental program
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Embodiment

[0035] Such as figure 1 as shown, figure 1 It is the numerical simulation method of ordinary heavy oil water-soluble viscosity reducer flooding in this example.

[0036] Step 101, collecting the basic performance parameters and experimental data of the water-soluble viscosity reducer. The concentration of water-soluble viscosity reducer at room temperature is 1.02mPa.s, and the mass density is 1023kg / m 3 , when the mass concentration of the water-soluble viscosity reducer is 0.1%, 0.3%, 0.5%, 0.8%, and 1%, the concentration of the oil-water mixture obtained is 14.5, 8.4, 6.5, 5.3, and 4.7mPa.s.

[0037] Step 102, on the basis of step 101, carry out trend line fitting to the experiment of reducing the viscosity of crude oil by water-soluble viscosity reducer, and obtain the fitted power formula:

[0038] y=4.73×x 0.486 .

[0039] Step 103, on the basis of step 102, calculate the viscosity of the oil-water mixture under different mass concentrations of the water-soluble vis...

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Abstract

The invention relates to the technical field of oilfield development, in particular to a method for conducting numerical simulation on water-soluble viscosity reducer flooding of common thickened oilreservoirs. The method comprises the steps of 1, collecting basic performance parameters and viscosity reduction experiment data of a water-soluble viscosity reducer; 2, conducting trend line fittingon experiments of lowering the viscosity of crude oil through the water-soluble viscosity reducer, and determining a fitting formula; 3, utilizing the formula obtained through fitting for calculatingthe concentration of oil-water mixed liquid under different mass concentrations of the water-soluble viscosity reducer; 4, calculating weight factors of the water-soluble viscosity reducer under different mass concentrations in a nonlinear mixing rule; 5, establishing a water-soluble viscosity reducer flooding reservoir numerical simulation model; 6, adjusting the weight factors of the water-soluble viscosity reducer, and conducting fitting on the water-soluble viscosity reducer flooding core flooding oil experiment result and the calculation result on the oil reservoir numerical simulation until the engineering calculation precision is reached. The method is convenient to achieve, few parameter requirements are needed, the application is easy, and numerical simulation on water-soluble viscosity reducer flooding is achieved.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a numerical simulation method for water-soluble viscosity reducer flooding in common heavy oil reservoirs. Background technique [0002] The development methods of heavy oil reservoirs are mainly divided into thermal recovery method and cold recovery method. The thermal recovery method reduces the viscosity of crude oil by heating the reservoir and improves the fluidity of crude oil in the formation. Traditional thermal recovery methods include steam huff and puff, steam flooding, burning oil layers, SAGD, thermal composite development technology, etc. However, due to the high production investment cost of thermal oil recovery, the large pollution of steam boilers, and high technical requirements, the challenges faced by the low oil price situation are gradually increasing. [0003] In recent years, more and more attention has been paid to chemical methods to incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22E21B49/00
CPCE21B43/16E21B49/00
Inventor 刘祖鹏吴光焕邓宏伟韦涛徐永辉李洪毅李伟唐亮曹秋莉魏超平
Owner CHINA PETROLEUM & CHEM CORP
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