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Preparation method of simulated oil in indoor oil displacement experiment and application thereof

A technology of experimental simulation and simulation of oil, which is applied in the direction of educational appliances, teaching models, instruments, etc., can solve the problems affecting the experimental results, etc., and achieve the effect of simple raw materials, stable performance and strong anti-oxidation ability

Inactive Publication Date: 2009-12-23
SICHUAN GUANGYA POLYMER CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, most water injection development oilfields need to add various chemical additives during the water injection process, and they will be partially dissolved in the crude oil, which is likely to have adverse reactions with the displacement fluid during the oil displacement experiment and affect the experimental results

Method used

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  • Preparation method of simulated oil in indoor oil displacement experiment and application thereof
  • Preparation method of simulated oil in indoor oil displacement experiment and application thereof
  • Preparation method of simulated oil in indoor oil displacement experiment and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] [embodiment 1] preparation of simulated oil

[0010] Accurately measure 3500mL of PAO base oil A (viscosity of 140mPa·s at 65°C) in a 1L beaker, then measure 1500mL of PAO base oil B (viscosity of 20mPa·s at 65°C) and slowly transfer it to the beaker with a glass rod. Place the beaker in a 65°C water bath, and slowly add 2g of tackifier dropwise. If the viscosity enhancer has poor fluidity, it can be left to stand in a 65°C water bath for 2 hours before adding. The prepared simulated oil was placed in a water bath at 65°C for 1 hour, and stirred slowly with a glass rod to prevent local overheating. Then, under the condition of constant temperature of 65° C., the mixture was mechanically stirred at a speed of 120 rpm for 1.5 hours. The final viscosity is 78 mPa·s, and the rate of change of viscosity is 1% after being placed in an incubator at 80° C. for 96 hours.

Embodiment 2

[0011] [embodiment 2] preparation of simulated oil

[0012] Accurately measure 4000mL of PAO base oil B (viscosity of 140mPa·s at 65°C) in a 1L beaker, then measure 1000mL of PAO base oil B (viscosity of 20mPa·s at 65°C) and slowly transfer it to the beaker with a glass rod. Place the beaker in a 65°C water bath, and slowly add 1g of tackifier dropwise. If the viscosity enhancer has poor fluidity, it can be left to stand in a 65°C water bath for 2 hours before adding. The prepared simulated oil was placed in a water bath at 65°C for 1 hour, and stirred slowly with a glass rod to prevent local overheating. Then, under the condition of constant temperature of 65° C., the mixture was mechanically stirred at a speed of 150 rpm for 2 hours. The final viscosity is 80.5 mPa·s, and the viscosity change rate is 1.5% after being placed in an incubator at 80° C. for 96 hours.

Embodiment 3

[0013] [Example 3] Simulated oil applied to sand-packed pipe flooding experiment

[0014] The injection water used in the water flooding experiment is simulated formation water (total salinity is about 10000mg / L), and the polymer used in the polymer flooding experiment is the hydrophobic association polymer P(AM-NaAA-C 16 DMAAC), the concentration is 1750mg / L. The simulated oil used has a viscosity of 78 mPa·s at 65°C. Sand filling pipe size: diameter 2.5cm, length 55cm. During the whole experiment, the constant temperature of the incubator and pipe fittings was 65°C. The core parameters and oil displacement efficiency are as follows: (the simulated oil saturation is used to indicate the percentage of simulated oil in the reservoir rock pores; the water flooding efficiency indicates the amount of oil recovered from the unit pore volume swept by the injected water. The oil reserves per unit volume swept by water at the beginning of water injection; polymer flooding efficienc...

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Abstract

The invention relates to a preparation method of simulated oil used in an indoor oil displacement experiment during oil production teaching and research, and an application thereof. Crude oil can be replaced by the simulated oil for an indoor sand-packed tube oil displacement. The technical scheme comprises the following steps: mixing poly alpha-olefin (PAO) base oil A (viscosity coefficient thereof is 140 mPa*s at the temperature of lower than 65 DEG C) with PAO base oil B (viscosity coefficient thereof is 20 mPa*s at the temperature of lower than 65 DEG C) according to a proportion of 70-80 : 30:20 to prepare primary simulated oil; wherein the mixing method is as follows: adding the base oil B with lower viscosity coefficient to the base oil A with higher viscosity coefficient; then adding 1-5g of tackifier into 1000mL of primary simulated oil; and finally mechanically stirring the prepared model oil for 1-2 hours at the temperature of 65 DEG C after the prepared simulated oil is placed in a water bath kettle, thereby obtaining the simulated oil for the experiment. The simulated oil has water displacement efficiency and polymer displacement efficiency similar to the crude oil, and realizes stable performance and good experiment repetitiveness; and the simulated oil is applicable to the sand-packed tube oil displacement experiment during the oil production teaching and scientific research.

Description

technical field [0001] The invention relates to a preparation method and application of simulated oil for an indoor oil displacement experiment in the fields of petroleum exploitation teaching experiments and petroleum exploitation research experiments. Background technique [0002] Core flooding experiment is a basic method in oil exploration teaching and technical research, which involves the oil displacement effect of various oil displacement working fluids in water injection development and chemical flooding enhanced oil recovery technology under different conditions. In the process of obtaining crude oil from actual production wells, due to changes in pressure and temperature, the overflow of dissolved gas in crude oil and the volatilization of light components make its viscosity higher than that in the underground, so it has to be used in core flooding experiments. Adding thin oil to it to simulate the underground viscosity of crude oil results in poor repeatability of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B25/02
Inventor 张瑞叶仲斌唐克施雷庭郭智栋
Owner SICHUAN GUANGYA POLYMER CHEM
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