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Experimental device and method for estimating water-controlling and air-intake effects of polymer

An experimental device, polymer technology, applied in the direction of measuring devices, suspension and porous material analysis, scientific instruments, etc., can solve the problems of gas well hazards and restrict the normal production of natural gas wells, etc.

Active Publication Date: 2014-07-30
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the air flow has enough energy, the formation water will be taken out of the wellhead; if the air flow energy is insufficient, the formation water will gradually accumulate in the wellbore and near the bottom of the well due to the slippage effect during the lifting process, causing serious damage to the gas well. Seriously restricting the normal production of natural gas wells

Method used

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  • Experimental device and method for estimating water-controlling and air-intake effects of polymer
  • Experimental device and method for estimating water-controlling and air-intake effects of polymer
  • Experimental device and method for estimating water-controlling and air-intake effects of polymer

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Embodiment 1

[0160] This embodiment provides an experimental device for evaluating the effect of polymer water control and air enhancement, such as image 3 As shown, the device includes a liquid source 27, a high-pressure displacement pump (the high-pressure displacement pump is a Quizix Q5000 high-pressure precision displacement pump, which includes a pressure sensor and a pump cylinder, and the set of precision displacement pumps can be provided with corresponding valves ), high pressure gas drive unit, confining pressure pump 22, rock core holder 21, measuring unit, first controller 37, second controller 26, constant temperature box 38, liquid source 27 is connected with the input end of high pressure displacement pump , the core holder 21 is provided with an inlet end, an output end and a confining pressure port, the high-pressure displacement pump and the high-pressure gas drive unit communicate with the inlet end of the core holder 21 respectively, and the confining pressure pump 22 ...

Embodiment 2

[0166] This embodiment provides an experimental method for evaluating the effect of polymer water control and gas enhancement, using the experimental device for evaluating the effect of polymer water control and gas enhancement in Example 1, including the following steps:

[0167] Prepare the polymer solution to be tested:

[0168] Prepare the required formation water (this embodiment simulates the formation water with distilled water), and weigh the required type and quantity of polymer with an electronic balance;

[0169] Use a magnetic stirrer to stir the solvent in the beaker into a vortex, and evenly disperse the weighed polymer in the fully stirred vortex within 1 minute. The placement position should be 2 / 3 from the center of the vortex to the wall of the vessel. ;

[0170] Reduce the rotation speed to 80-100 rpm to avoid polymer degradation caused by excessive rotation speed;

[0171] Stir for more than 1 hour. After the polymer is fully dispersed, turn off the agitato...

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Abstract

The invention provides an experimental device and method for estimating water-controlling and air-intake effects of a polymer. The experimental device comprises a high-pressure displacement pump, a high-pressure gas-driven unit, a confining pressure pump, a core holding unit, a measurement unit and a first controller, wherein the core holding unit is provided with an inlet end, an output end and a confining pressure hole, the high-pressure displacement pump and the high-pressure gas-driven unit are respectively communicated with the inlet end of the core holding unit, the confining pressure pump is communicated with the confining pressure hole, the measurement unit is communicated with the output end, and the first controller is connected with the measurement unit. The experimental method is used for estimating the water-controlling and air-intake effects of the polymer by virtue of gas-water relative permeability curves which are tested before and after the polymer is injected by the experimental device. According to the experimental method, a selective shielding layer, namely a polymer film, is established on the surface of a gas pool core by virtue of a technical process that the polymer is utilized for controlling yielding water of a gas well in a natural gas exploitation field, a proper polymer water control agent can be selected out by virtue of an indoor experiment, and production proposals and work instructions are provided for the gas well.

Description

technical field [0001] The invention relates to an experimental device and an experimental method for evaluating the water-controlling and gas-increasing effect of polymers, belonging to the technical field of petroleum and natural gas exploitation. Background technique [0002] In the process of natural gas development, due to the advancement of edge water and bottom water, as well as fracturing, acidification and other operational measures, water continues to accumulate in the wellbore of the gas well, resulting in "fluid accumulation in the gas well", resulting in a decrease in gas production and even crushing the gas well. If the air flow has enough energy, the formation water will be taken out of the wellhead; if the air flow energy is insufficient, the formation water will gradually accumulate in the wellbore and near the bottom of the well due to the slippage effect during the lifting process, causing serious damage to the gas well. Seriously restrict the normal produ...

Claims

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Application Information

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IPC IPC(8): G01N15/08
Inventor 刘广峰李雪娇田树宝顾岱鸿何顺利李帅刘宗科赵文海付军孙长泉于皓吕志凯冯莎莎
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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