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Complex heavy oil reservoir oil solubility foaming agent intensified mixed gas huff-puff experimental equipment and application method thereof

A technology for mixing gas and heavy oil reservoirs, applied in the fields of fluid production, earthwork drilling, measurement, etc., can solve the problems of increased crude oil viscosity, decreased formation pressure, poor solubility, etc., to reduce viscosity, reduce dosage, avoid The effect of liquefaction

Active Publication Date: 2018-05-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology still has the following problems: ①The rapid production of injected gas during the huff and puff production stage leads to a rapid decrease in formation pressure and a re-increase in crude oil viscosity; ②The natural gas, CO 2 、CH 4 Light components such as gases diffuse in heavy oil and have poor solubility, while ethane, propane, etc. have low dew points and are easily liquefied, resulting in excessive dosage and high cost

Method used

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  • Complex heavy oil reservoir oil solubility foaming agent intensified mixed gas huff-puff experimental equipment and application method thereof
  • Complex heavy oil reservoir oil solubility foaming agent intensified mixed gas huff-puff experimental equipment and application method thereof
  • Complex heavy oil reservoir oil solubility foaming agent intensified mixed gas huff-puff experimental equipment and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] An oil-soluble foaming agent enhanced mixed gas throughput experiment device for complex heavy oil reservoirs, comprising: a core holder, a formation water container and a live oil container are connected in parallel at the inlet of the core holder, and the core holder The outlet of the holder is connected in parallel with an oil-soluble foaming agent container and a mixed gas container; the outlet of the core holder is also sequentially connected with an artificial foam oil generation observation window, a back pressure valve and a gas-liquid separation device.

[0102] The gas-liquid separation device includes a separator, a high-precision electronic balance, a gas measurement system and a vacuum pump.

[0103] The core holder is an internal pressure measuring core holder; preferably, the pressure measuring points of the core holder are distributed on the core rubber sleeve of the core holder.

Embodiment 2

[0105] An experimental device for enhancing mixed gas huff and puff with oil-soluble foaming agent in a complex heavy oil reservoir as described in Example 1. The difference is that the length of the core holder is 1m-2m, and the inner diameter is 0.025m-0.075m .

Embodiment 3

[0107] As described in Example 1, a complex heavy oil reservoir oil-soluble foaming agent enhanced mixed gas huff and puff experiment device, the difference is that the artificial foam oil generation observation window includes a visible window outer body, in the visible window body Two thickened glasses are provided, a flow channel arranged in the middle of the thickened glass, a visible window inlet is arranged at one end of the flow channel, and a visible window outlet is arranged on the other end of the flow channel. The outer body of the window is connected with the thickened glass through a hollowed-out window. In practical applications, the artificial foam oil generation observation window can withstand pressure greater than 10 MPa and withstand temperature greater than 50°C. The artificial foam oil generating window is a cube, and the outer body size range of the window is 60-100mm in width, 140-180mm in length, and 40-60mm in height; the visible size range of the windo...

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Abstract

The invention discloses complex heavy oil reservoir oil solubility foaming agent intensified mixed gas huff-puff experimental equipment. The mixed gas is natural gas and propane which have better dissolution and viscosity-breaking effects compared with the natural gas, CO2 or CH4 and other single light component gas, the propane gas can be effectively prevented from liquefaction, so that the propane gas consumption can be reduced, and the propane gas use cost is reduced. In addition, an oil solubility foaming agent is matched with the mixed gas to generate artificial foam oil to reduce the speed of gas output during the huff-puff period, and the heavy oil viscosity can be reduced, so that the problem that the recovery efficiency of existing complex heavy oil reservoir is not high can be solved.

Description

Technical field [0001] The invention relates to a complex heavy oil reservoir oil-soluble foaming agent enhanced mixed gas stimulation experiment device and an application method thereof, and belongs to the technical field of heavy oil reservoir exploitation. Background technique [0002] Heavy oil resources are abundant in the world, accounting for more than one third of the total oil and gas resources. my country's proven and controlled reserves are more than 1.9 billion tons, which are widely distributed in dozens of oil fields such as Liaohe, Xinjiang and Shengli. In addition, with the internationalization of my country's oil and gas exploration and development, a large number of foreign heavy oil resources are urgently awaiting development (Venezuela's Orinoco heavy oil belt, etc.). Therefore, with the increasing difficulty of conventional oil and gas exploration and development and the increasingly prominent energy contradiction, it is of great significance to vigorously d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B43/22E21B43/16E21B47/06
CPCE21B43/16E21B43/168E21B47/06E21B49/00
Inventor 孙晓飞张艳玉赵豪刘云龙高泽宇王长法陈广鹏宋兆尧
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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