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Variable well inclination and visual oil well sand control evaluation experimental device and method

A technology for visualizing oil wells and experimental devices, which is applied in wellbore/well components, earthwork drilling, and fluid production, etc. It can solve the problems of underground wellbore access, rarity of large-scale physical models, and the reliability of experimental results is open to question, and achieve experimental results. Reliable, optimized construction parameters, improved development effect

Inactive Publication Date: 2020-08-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, large-scale physical models for simulating wellbores in China are very rare, and there are some simple physical models in some scientific research institutes, but there are large differences between them and the real situation of underground wellbores, resulting in the reliability of experimental results to be questioned

Method used

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  • Variable well inclination and visual oil well sand control evaluation experimental device and method
  • Variable well inclination and visual oil well sand control evaluation experimental device and method
  • Variable well inclination and visual oil well sand control evaluation experimental device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1: Transparent Test Wellbore 1 Annulus Filling Experiment

[0051] In this embodiment, in the step 1, the sand control pipe is placed in the transparent test wellbore 1, and the transparent test wellbore 1 is adjusted to a vertical state; a dead plug is installed on the sand filling hole and clamped; the outlet pipeline is connected;

[0052] In said step 2, open the sand mixing tank 12, put the pre-measured ring filling sand into the sand mixing tank 12 and clamp the sand filling port, and adjust the sand adding speed according to the expected sand carrying ratio, and the sand carrying ratio should be slowly increased To the expected value, and adjust according to pressure and flow changes at any time; when the pressure rises, the sand-carrying ratio should be quickly reduced according to the pressure change until the sand is stopped and replaced.

[0053] Draw the time-flow and pressure-flow curves according to the data recorded in the seepage experiment.

Embodiment 2

[0054] Embodiment 2: Sand control seepage experiment

[0055] In this embodiment, in the step 2, firstly add the well-wetted formation sand into the transparent test wellbore 1 until it is filled and solid;

[0056] In the step 3, the transparent test shaft 1 is blocked and clamped, and the starting pressure of the pressure relief valve is adjusted.

[0057] Start the high-pressure plunger pump 4 to perform the seepage test. After the pressure is stable, collect a set of data according to the seepage test record sheet. Increase the starting pressure of the pressure relief valve step by step. After the pressure is stable, collect the second set of data according to the seepage test record sheet. Increase the starting pressure of the pressure relief valve step by step. After the pressure is stable, collect the third set of data according to the seepage test record sheet. (The collected data shall not be less than 3 groups, each group shall not be less than 5 flow values, and t...

Embodiment 3

[0059] Example 3: Clay plugging seepage experiment

[0060] In the step 3, without changing the cycle state of the sand control seepage test, take 10% of the formation sand amount of clay, and evenly add it to the liquid storage tank 22. After the pressure is stable, continue the cycle for 2 weeks.

[0061] A set of data is collected according to the seepage experiment record sheet. Stop the pump to release the pressure, the stabilization time is not less than 24h, and then repeat the above steps.

[0062] Check whether there is formation sand in the tested pipe and take samples. Draw the time-flow and pressure-flow curves according to the data recorded in the seepage experiment.

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Abstract

The invention discloses a variable well inclination and visual oil well sand control evaluation experimental device. The variable well inclination and visual oil well sand control evaluation experimental device is characterized in that a transparent test shaft of the device is arranged in a vertical support; the bottom of a liquid storage tank is connected with an inlet of a high-pressure plungerpump through a pump inlet pipeline; one path of an outlet of the high-pressure plunger pump is connected with a simulated shot hole III of the transparent test shaft through a pump outlet pipeline I and a pump outlet valve I, and the other path of the outlet of the high-pressure plunger pump is connected with the top of a sand mixing tank through a pump outlet pipeline II and a pump outlet valve II; the bottom of the transparent test shaft is connected with a grit chamber; the grit chamber is connected with a water tank through a water inlet pipe; and a water outlet pipe of the water tank is connected with the liquid storage tank through a flow meter. According to the variable well inclination and visual oil well sand control evaluation experimental device, the defect of great deviation between an existing large physical model and the condition of an underground shaft is overcome, and the detailed description of the implementation processes of different sand control processes can be simulated under different well inclination angles; and the change of a sand control system in the formation production process after sand control can be simulated, so that the variable well inclinationand visual oil well sand control evaluation experimental device has important significance for correctly understanding the sand control processes and the influence rule of the system stability after the sand control.

Description

technical field [0001] The invention relates to oil well sand control technology in the petroleum industry, in particular to a variable well deviation and visual oil well sand control evaluation experimental device and method. Background technique [0002] During the production process of oil and water wells, due to various comprehensive factors such as geological conditions, mining methods, and measures and operations, the rock structure of the formation near the bottom of the well changes, resulting in discrete sand or shed sand in the formation being carried out by the formation fluid. For normal production, appropriate sand control measures must be taken. Mechanical sand control is currently the most commonly used sand control method in major sand producing oilfields. At present, due to the deepening of oilfield development, the number of well types is increasing year by year, including highly deviated wells and horizontal wells. The basic research of conventional mechan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/04
CPCE21B43/04
Inventor 刘永达张德杰高成元周宗延乐春蕾高文蔡薇薇
Owner CHINA PETROLEUM & CHEM CORP
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