Experimental method for productivity simulation of multi-layer co-production of natural gas reservoirs

A multi-layer co-production and simulation experiment technology, which is applied in the direction of production fluid, earthwork drilling and production, wellbore/well components, etc., can solve the problems that the evaluation results cannot effectively guide the field development, and the distance is large, so as to achieve convenient operation and accurate gas Intuitive effect of production capacity and experimental results

Inactive Publication Date: 2020-03-17
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some scholars at home and abroad are trying to establish indoor experimental methods to evaluate the degree of interference in multi-layer co-production, but the experimental process is far from the actual field development, resulting in the evaluation results cannot effectively guide the field development

Method used

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  • Experimental method for productivity simulation of multi-layer co-production of natural gas reservoirs
  • Experimental method for productivity simulation of multi-layer co-production of natural gas reservoirs
  • Experimental method for productivity simulation of multi-layer co-production of natural gas reservoirs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Joint development of production layer 1 and production layer 2

[0042] In order to simulate the above three production layers, it is necessary to use three pressure cylinders 1, such as figure 1 As shown, assume that the numbers of the three pressure cylinders 1 are gas cylinder eleven, gas cylinder twelve and gas cylinder thirteen respectively, wherein gas cylinder eleven corresponds to stratum serial number A, and gas cylinder twelve corresponds to stratum serial number B , cylinder thirteen corresponds to formation serial number C.

[0043]Set the initial pressure of gas cylinder 11 to 30MPa, and the confining pressure of the core holder connected to gas cylinder 11 to 16MPa. A core plunger with a diameter of 25mm is loaded into the core holder, the temperature of the core plunger is set to 46°C, and the pressure of the air inlet of the core holder cylinder is constant at 13MPa.

[0044] Set the initial pressure of gas cylinder 12 to 30MPa, and the confining press...

Embodiment 2

[0053] (1) Determine the number of core plungers used in the indoor simulation experiment according to the number of strata in the joint mining.

[0054] (2) Put the core plunger used in the experiment into the corresponding core holder after the pre-cleaning, drying and vacuuming treatment.

[0055] (3) According to the measured data of the stratum on site, the temperature of the core plunger is controlled to be consistent with the formation temperature, and the confining pressure of the plunger is consistent with the stress of the overlying rock in the stratum. Control the inlet pressure of the core plunger to be consistent with the on-site formation pressure, and control the outlet pressure of the core plunger to be consistent with the pressure of the on-site gas production tubing.

[0056] (4) Connect the inlet of each core holder to a fixed-volume high-pressure gas cylinder, and fill the gas cylinder with nitrogen or air until the initial pressure value is greater than th...

Embodiment 3

[0062] The stratigraphic parameters of the three production zones simulated by the evaluation device are shown in Table 3.

[0063] Table 3 Stratigraphic parameters of production zones

[0064]

[0065] Joint development of production layer A, production layer B, and production layer C

[0066] Take the multi-yield comprehensive development production capacity evaluation experimental device connected in parallel with three sets of single-yield development simulation devices as an example, as shown in the accompanying drawing figure 1 As shown, the joint development of production layer A, production layer B and production layer C is simulated.

[0067] Set the initial pressure of gas cylinder 11 to 25MPa, and set the confining pressure of the core holder of production layer A to 18MPa. Put a core plunger with a diameter of 25mm into the core holder, set the plunger temperature to 48°C, the inlet pressure to a constant 16MPa, and the outlet pressure to a constant 3MPa.

[...

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Abstract

The invention aims at providing a simulation experiment method convenient to operate and capable of accurately simulating gas capacity quantitative evaluation under the condition of natural gas multi-layer commingling operation process, of multi-layer commingling capacity of a natural gas reservoir. The simulation experiment method of the multi-layer commingling capacity of the natural gas reservoir comprises a plurality of pressure gas containing bottles; a gas outlet of each pressure gas containing bottle is connected with a gas inlet of each reducing valve correspondingly, and a gas outlet of each reducing valve is connected with a gas inlet of each rock core clamp tube body correspondingly; a temperature measuring unit and a confining pressure measuring unit are installed on the wall of each rock core clamp tube body correspondingly, a gas outlet of each rock core clamp tube body is connected with an entrance of each bi-directional valve through a pipeline which is in series connection with a branch-pipe backpressure valve and a branch-pipe flow meter correspondingly, and an exit of each bi-directional valve is connected with the lower portion of a cylindrical container through a pipeline correspondingly; and the top of the cylindrical container is connected with outside air through a pipeline which is in series connection with a header pipe backpressure valve and a header pipe flow meter.

Description

technical field [0001] The present invention relates to the field of petroleum engineering, in particular to the gas production capacity evaluation of single well and multi-layer co-production of multi-type natural gas reservoirs such as sandstone gas, coalbed methane and shale gas, and specifically relates to a method for simulating the production capacity of multi-layer co-production of natural gas reservoirs . Background technique [0002] For vertically distributed resource areas of multiple types of natural gas reservoirs such as sandstone gas, coalbed methane, and shale gas, simultaneous exploitation of multiple formations through a single well can effectively increase single well productivity, reduce gas well operating costs, and save natural gas resource development cycles. At present, the areas represented by Daniudi and Linxing in the Ordos Basin in China have carried out multi-gas reservoir joint production engineering practice, but there is interlayer interferenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00E21B43/14
CPCE21B43/14E21B49/00
Inventor 郑力会魏攀峰谢彬强李忠慧张艳程立
Owner YANGTZE UNIVERSITY
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