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A physical simulation experiment device for mining heavy oil asphalt reservoirs by burning oil layers

A technology for physical simulation and burning of oil layers, applied in the fields of production fluid, earthwork drilling, wellbore/well components, etc., can solve the complex mechanism of burning oil layers, it is difficult to monitor and control the front of burning oil layers, and the lack of combustion and oil displacement process Intuitive and accurate understanding of issues such as

Active Publication Date: 2018-04-20
NORTHEAST GASOLINEEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex mechanism of burning oil layers, there are still many problems in the engineering design of burning oil layer reservoirs and the dynamic management of mines, especially the lack of intuitive and accurate understanding of the combustion and oil displacement processes in the reservoirs, and it is difficult to take effective measures to accurately Judging underground combustion conditions, monitoring and controlling the front of burning oil layers

Method used

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  • A physical simulation experiment device for mining heavy oil asphalt reservoirs by burning oil layers
  • A physical simulation experiment device for mining heavy oil asphalt reservoirs by burning oil layers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1. The implementation examples of the present invention are as follows figure 1 As shown, the physical simulation experiment device for ignited oil layer mining heavy oil asphalt reservoir includes a nitrogen tank 1 and an air tank. The nitrogen tank 1 and the air tank are respectively connected to a gas filter 3 through a pipeline, and each pipeline is provided with Valve A, the gas filter 3 is connected to the first piston container 5, and a valve B is provided between the gas filter 3 and the first piston container 5, and the first piston container 5 is also connected to a water storage tank 4 and a steam generator 8. And a valve C is provided between the first piston container 5 and the water storage tank 4, a mass flow meter 6 is provided between the first piston container 5 and the steam generator 8, and a mass flow meter 6 is provided between the first piston container 5 and the mass flow meter 6. There is a valve D, a valve E and a valve F are provided ...

Embodiment 2

[0027] Example 2: With 0.015sm 3 / hr speed and 140kPa inlet pressure to inject nitrogen to measure the permeability of the sand pack model. This process continues until all the air in the tube is displaced. When the oxygen analyzer and gas chromatograph 19 detect that the output contains oxygen, the electric heater is turned on, and the temperature of the combustion tube 26 uniformly rises to 70°C. At this time, nitrogen continued to flow through the combustion tube 26, the igniter was turned on, and the temperature of the upper layer gradually rose to 300°C. Nitrogen injection was stopped and air injection was started immediately. This process ensures rapid ignition of the crude oil to eliminate the effect of low-temperature oxidation. When the ignition state is determined, the temperature of the end face of the model rises rapidly. This can also be confirmed by a sudden drop in oxygen content and an increase in the concentration of carbon monoxide and carbon dioxide exhaus...

Embodiment 3

[0031] Embodiment 3. Examples of the present invention figure 1 As shown, first, the bottom flange of the combustion tube 26 is installed. Insert two thermowells connected to the bottom mesh steel plate to prevent sand from clogging the pipeline into the combustion tube 26. After that, install the top flange of the combustion tube 26 and tighten the flange bolts. Then the mass of the combustion tube 26 is weighed. After that, install the injection assembly to prepare for the pressure test of the bottom flange connection. Model 1MPa pressure leak test for 15 minutes. Once the pressure test is successfully completed, unscrew the injection tube and the pressure in the combustion tube 26 drops to atmospheric pressure. Measure out about 7000g of sand and put it in the mixing tank, then add 500g of water, and stir thoroughly with a small spatula. After that, add 500 g of crude oil and let it mix well until it reaches a uniform distribution. Weigh the final mixture to determine t...

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Abstract

The invention discloses a physical simulation experiment for mining thickened oil and asphalt reservoir through in-situ combustion. A nitrogen tank and an air tank are connected with a gas filter through pipelines. The gas filter is connected with a first piston container which is further connected with a water storage tank and a steam generator. The steam generator is further connected with a second piston container. The steam generator is connected with a combustion pipe assembly which is connected with a back-pressure valve. The back-pressure valve is connected with a first separator. The first separator is connected with a condenser with a valve K. The condenser is connected with an acid picking tank, the other end of the acid picking tank is connected with a calcium sulfate drying tank, the other end of the calcium sulfate drying tank is connected with an oxygen detector, and the oxygen detector is connected with a gas chromatograph. A mass flowmeter, a first pressure sensor, a second pressure sensor and a wet-type gas flowmeter are connected with a data signal converter which is connected with a computer. By means of the physical simulation experiment for mining thickened oil and asphalt reservoir through in-situ combustion, the stratum ignition temperature, the temperature generated before and after front edge fireflood is conducted, the pressure distribution rule and the change rule of the components and the physical properties of rock before and after the fireflood is conducted can be observed.

Description

Technical field [0001] The invention relates to the technical field of petroleum engineering and technology, and in particular to a physical simulation experiment device for exploiting heavy oil pitch reservoirs in fired oil layers. Background technique [0002] Burning the oil layer is one of the important methods to improve the oil recovery rate, and belongs to the thermal mining technology. It uses part of the cracked products of the oil layer itself as fuel, continuously burns to generate heat, and relies on heat and other comprehensive driving forces to achieve the purpose of improving oil recovery. The original idea of ​​burning oil reservoirs was to increase the oil recovery of heavy oil reservoirs. This method is not only used to improve the recovery of heavy oil, oil sands, and bitumen reservoirs, but also suitable for the production of crude oil in medium and light oil reservoirs. [0003] The fire-burning oil layer technology originated in 1911. As early as 1917, J.O. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00E21B43/243
CPCE21B43/243E21B49/00
Inventor 赵法军刘永建吴景春马海程王云龙石岩松
Owner NORTHEAST GASOLINEEUM UNIV