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Measuring method of high-temperature oil-water relative permeability of heavy oil reservoir

A technology for relative permeability and heavy oil reservoirs, which is applied to the measurement field of high temperature oil-water relative permeability in heavy oil reservoirs, and can solve the problems of no simpler measurement method, cumbersome and complicated measurement process, and dangerous experimental conditions.

Inactive Publication Date: 2016-05-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this measurement method has high requirements on the experimental equipment, the measurement process is cumbersome and complicated, and the experimental conditions of high temperature and high pressure are dangerous, all of which increase the experimental difficulty of the measurement of high-temperature oil-water relative permeability in heavy oil reservoirs
At the same time, there is no simpler and safer measurement method in the existing domestic and foreign literature, patents and other materials

Method used

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  • Measuring method of high-temperature oil-water relative permeability of heavy oil reservoir
  • Measuring method of high-temperature oil-water relative permeability of heavy oil reservoir
  • Measuring method of high-temperature oil-water relative permeability of heavy oil reservoir

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Embodiment 1

[0049] A method for measuring high-temperature oil-water relative permeability in heavy oil reservoirs, comprising the following specific steps:

[0050] 1) Prepare oil for experiment;

[0051] 2) Prepare the core: install the core in the sand filling pipe model, the size parameters of the core include: length L=60cm, cross-sectional diameter d=2.54cm, cross-sectional area A=5.07cm 2 , volume V f =304.02cm 3 The size of the core is the size of the sand-packing pipe model. The core here is filled with quartz sand that is similar to the particle distribution of the actual formation rock sample and has the same wettability according to the parameters such as the porosity and permeability of the actual formation. ;

[0052] 3) Check the tightness of the sand-packing pipe model, if the sealing of the sand-filling pipe model is good, record the absolute permeability K=2880mD of the rock core by gas testing method; saturate the sand-packing pipe model after vacuuming Water, recor...

Embodiment 2

[0085] A kind of measuring method of high-temperature oil-water relative permeability of heavy oil reservoir as described in embodiment 1, its difference is, described step 1) in the preparation method of experimental oil, comprises steps as follows:

[0086] 1.1) Measure the heavy oil to be tested at the temperature T 1 = Viscosity μ at 250°C o1 =4.64mPa·s;

[0087] 1.2) According to the relationship table between the viscosity and temperature of water in the "Chemical and Chemical Physical Properties Data Manual", it is found that the water is at the temperature T to be measured. 1 = Viscosity μ at 250°C w1 =0.11mPa·s and experimental temperature T 2 = Viscosity μ at 20°C w2 =1mPa·s, so as to calculate the temperature T to be measured 1 = Oil-water viscosity ratio at 250°C

[0088] 1.3) Use the heavy oil to be tested and naphtha to prepare the experimental oil, and measure the temperature of the experimental oil at the experimental temperature T 2 = Viscosity μ at 2...

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Abstract

The invention discloses a measuring method of high-temperature oil-water relative permeability of a heavy oil reservoir. A method for replacing high-temperature oil-water relative permeability of the heavy oil reservoir with oil-water relative permeability under the low-temperature oil-water system condition is put forward for the first time, reduces the measuring difficulty of the high-temperature oil-water permeability of the heavy oil reservoir, avoids potential safety hazards caused by high-temperature and high-pressure experiment conditions and simplifies experiment processes and operation requirements, and the oil-water relative permeability obtained with the two measuring methods is basically identical on the premise that the oil-water viscosity ratio is equal, thus, simple, time-saving, safe and accurate measurement of the high-temperature heavy oil relative permeability is realized with the method.

Description

technical field [0001] The invention relates to a method for measuring the high-temperature oil-water relative permeability of heavy oil reservoirs, belonging to the technical field of oil and gas field development. Background technique [0002] Heavy oil is rich in resources and has great potential for exploitation. With the increasingly prominent contradiction between oil supply and demand, the development of heavy oil reservoirs will definitely become a hot spot in oil exploration in the future. Thermal oil recovery by steam injection is the most important way to develop heavy oil reservoirs, and the common development methods include steam huff and puff, steam flooding, SAGD, etc. In the process of thermal recovery, the co-seepage process of heavy oil, steam, hot water and other multiple thermal fluids is very complicated. Understanding and analyzing the relative permeability of oil and water under high temperature and high pressure conditions is very important for study...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 李兆敏王壮壮李松岩李宾飞刘己全
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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