A kind of heavy oil well wellbore viscosity reduction test device and method

A test method and wellbore technology are applied in the process optimization of the viscosity reducer for heavy oil wells and the field of viscosity reduction test devices for heavy oil wells, which can solve the problems of lack of theoretical basis, low accuracy and reliability, and achieve a high degree of simulation. , Simple structure, improve the effect of on-site application effect

Active Publication Date: 2020-04-03
DONGYING TONGBO PETROLEUM ELECTRONIC INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the on-site dosing process of heavy oil viscosity reducer (dosing amount and dosing cycle of viscosity reducer) is mainly determined according to the working experience of scientific researchers. Since this method lacks theoretical basis, the accuracy and reliability are not strong.

Method used

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  • A kind of heavy oil well wellbore viscosity reduction test device and method
  • A kind of heavy oil well wellbore viscosity reduction test device and method
  • A kind of heavy oil well wellbore viscosity reduction test device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0063] CD of a heavy oil well in a block of Shengli Oilfield 11 , Oil layer pressure 10.5MPa, oil layer temperature 56℃, surface crude oil viscosity 8560mPa.s, well depth 525m, produced fluid water content 80% (oil-water ratio 1:4), daily fluid production is 100m 3 , It is planned to use heavy oil viscosity reducer to reduce the viscosity of the wellbore. The mass concentration of the heavy oil viscosity reducer is 20%. Before field implementation, the device and method of the present invention are used to optimize the dosage of the heavy oil viscosity reducer. Specific steps are as follows:

[0064] (1) Determine CD of simulated heavy oil well 11 Parameters such as oil layer pressure, temperature, well depth and produced fluid water cut.

[0065] The oil layer pressure is 10.5MPa, the oil layer temperature is 56°C, the well depth is 525m, and the produced fluid contains 80% water (oil-water ratio 1:4).

[0066] (2) Determine the value of n according to the depth of the simulated he...

Embodiment 2

[0090] CD of a heavy oil well in a block of Shengli Oilfield 32 , Oil layer pressure 9.2MPa, oil layer temperature 90℃, surface crude oil viscosity 9256mPa.s, well depth 980m, produced fluid water content 90% (oil-water ratio 1:9), daily fluid production volume is 120m 3 It is planned to use heavy oil viscosity reducer to reduce the viscosity of the wellbore. The mass concentration of the heavy oil viscosity reducer is 25.0%. Before field implementation, the device and method of the present invention are used to optimize the dosage of the heavy oil viscosity reducer. Specific steps are as follows:

[0091] (1) Determine CD of simulated heavy oil well 32 Parameters such as oil layer pressure, temperature, well depth and produced fluid water cut.

[0092] The oil layer pressure is 9.2MPa, the oil layer temperature is 90°C, the well depth is 980m, and the produced fluid contains 90% water (oil-water ratio 1:9).

[0093] (2) Determine the value of n according to the depth of the simulat...

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Abstract

The invention belongs to the technical field of the petroleum industry and particularly relates to a wellbore viscosity reduction testing device and method for heavy oil wells. The device comprises a wellbore simulation unit, an oil and water injection unit, a viscosity reducer feeding unit, a reservoir pressure simulation unit, an output liquid treatment and recovery unit, a viscosity online testing unit and a control unit. The oil and water injection unit and the viscosity reducer feeding unit are connected with the bottom of the wellbore simulation unit and the bottom of the side wall through high-pressure pipelines respectively, the reservoir pressure simulation unit and the output liquid treatment and recovery unit are connected with the top of the wellbore simulation unit through high-pressure pipelines and the viscosity online testing unit is connected to the side wall of the wellbore simulation unit. The device and the method have advantages of high automation and simulation degree, and viscosity reduction rates and micro viscosity reduction mechanisms of heavy oil well wellbore chemical agents under different conditions can be simulated so as to provide reliable theoretical bases for determination of field technical parameters of heavy oil well viscosity reducers. Therefore, wellbore viscosity reduction testing device and method for the heavy oil wells can be widely applied to chemical viscosity reduction field test of the heavy oil wells.

Description

Technical field [0001] The invention belongs to the technical field of petroleum development, and in particular relates to a heavy oil well wellbore viscosity reduction test device and method, which are used for process optimization of a heavy oil well wellbore viscosity reducer. Background technique [0002] Heavy oil is an important part of natural petroleum. It is not only a power fuel, but also an important raw material for the chemical industry and construction industry. The world's heavy oil and asphalt resources are extremely rich, with geological reserves of approximately 618 billion barrels. Heavy oil has poor fluidity and high viscosity. The key issue in mining is to reduce viscosity and improve its fluidity. Wellbore viscosity reduction technology refers to the use of thermal, chemical, dilution and other measures to keep the fluid in the wellbore low in viscosity, so as to improve the flow conditions of the wellbore fluid, alleviate the incompatibility of pumping equ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/04
CPCG01N11/04
Inventor 陈洪帅薛善强郭辽原曹光华
Owner DONGYING TONGBO PETROLEUM ELECTRONIC INSTR CO LTD
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