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An experimental device for enhancing mixed gas huff and puff with oil-soluble foaming agent in complex heavy oil reservoirs and its application method

A technology for mixed gas and heavy oil reservoirs, which is applied in the fields of production fluid, earthwork drilling, wellbore/well components, etc. It can solve the problems of crude oil viscosity increase, formation pressure decrease, and poor solubility, so as to reduce viscosity, Reduce the dosage and avoid the effect of liquefaction

Active Publication Date: 2019-01-15
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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  • An experimental device for enhancing mixed gas huff and puff with oil-soluble foaming agent in complex heavy oil reservoirs and its application method
  • An experimental device for enhancing mixed gas huff and puff with oil-soluble foaming agent in complex heavy oil reservoirs and its application method
  • An experimental device for enhancing mixed gas huff and puff with oil-soluble foaming agent in complex heavy oil reservoirs and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] An oil-soluble foaming agent-enhanced mixed gas huff and puff experimental device for complex heavy oil reservoirs, comprising: a core holder, a formation water container and an active oil container are connected in parallel at the entrance of 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] A complex heavy oil reservoir oil-soluble foaming agent enhanced mixed gas huff and puff experimental device 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] A complex heavy oil reservoir oil-soluble foaming agent enhanced mixed gas huff and puff experimental device as described in Example 1, the difference is that the artificial foam oil generation observation window includes an outer body of the visible window, inside the visible window The two pieces of thickened glass are provided, and the flow passage provided in the middle of the thickened glass is provided with a visible window inlet at one end of the flow passage, and a visible window outlet is provided at the other end of the flow passage. The outer body of the window is connected with the thickened glass through a hollowed out window. In practical application, the artificial foam oil generation observation window can withstand a pressure greater than 10MPa and a temperature greater than 50°C. The visible window generated by the artificial foam oil is a cube, and the size range of the outer body of the visible window is 60-100mm in width, 140-180mm in length, and 40...

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PUM

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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 an oil-soluble foaming agent-enhanced mixed gas huff and puff experimental device for complex heavy oil reservoirs and an application method thereof, belonging to the technical field of heavy oil reservoir exploitation. Background technique [0002] Heavy oil resources are very rich 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, widely distributed in more than a dozen 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 need to be developed urgently (Venezuela's Orinoco heavy oil belt, etc.). Therefore, at the moment when conventional oil and gas exploration and development are becoming more and more difficult and energy conflicts are becoming more and more prominent, it is ...

Claims

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Application Information

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Patent Type & Authority Patents(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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