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Optimization method of perforation parameters for high temperature and high pressure oil and gas vertical wells based on calculation of skin factor

A high-temperature, high-pressure, skin-coefficient technology used in earth-moving drilling, wellbore/well components, etc.

Active Publication Date: 2017-12-22
SICHUAN UNIV
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Problems solved by technology

[0055] In order to solve the perforation parameter optimization problem of high-temperature and high-pressure oil-gas vertical wells, the present invention proposes a method for optimizing perforation parameters of high-temperature and high-pressure oil-gas vertical wells based on skin coefficient calculation

Method used

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  • Optimization method of perforation parameters for high temperature and high pressure oil and gas vertical wells based on calculation of skin factor
  • Optimization method of perforation parameters for high temperature and high pressure oil and gas vertical wells based on calculation of skin factor
  • Optimization method of perforation parameters for high temperature and high pressure oil and gas vertical wells based on calculation of skin factor

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Embodiment

[0245] Taking the YB-X high temperature and high pressure gas well as an example, using the optimization model established above, the optimal perforation distribution and parameter optimization of perforated wells are analyzed. As mentioned above in the model analysis and solution process, the perforated well section should be divided into several perforated units starting from the bottom. In order to simplify the calculation, the perforation section is divided into many perforation segments, and the perforation units contained in each perforation segment are not necessarily the same, and then the calculation is performed according to the above calculation steps.

[0246] Relevant parameters and measurement data: see Table 2-Table 4 for tubing data, casing data, wellbore sounding, well inclination, azimuth and wellbore vertical depth in the example simulation. In addition, some data need to be supplemented, including: the perforation range of the vertical well is 6600-7100m, t...

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Abstract

The invention belongs to the technical field of oil and gas reservoir development engineering management, and in particular relates to the construction of a high-temperature and high-pressure oil-gas vertical well perforation parameter optimization model, oil-gas reservoir seepage steady-state analysis, oil-gas vertical well skin coefficient calculation method, numerical simulation algorithm design and the like. In order to solve the problem of optimizing perforation parameters of high-temperature and high-pressure oil-gas vertical wells, the present invention proposes a method for optimizing perforation parameters of high-temperature and high-pressure oil-gas vertical wells based on skin coefficient calculation. The method includes: A. constructing a wellbore flow model; B. constructing a perforation parameter optimization model based on skin effect; C. solving the perforation parameter optimization model. Through the selection of different perforation parameters, the present invention can obtain corresponding optimization models and optimization schemes, which can be used to analyze the influence of different perforation parameters on productivity, which provides a theoretical basis for the selection of perforation parameters, and is useful for increasing vertical well productivity and improving productivity. Inflow profiling and stability testing are of great significance.

Description

technical field [0001] The invention belongs to the technical field of oil and gas reservoir development engineering management, and in particular relates to the construction of a high-temperature and high-pressure oil-gas vertical well perforation parameter optimization model, oil-gas reservoir seepage steady-state analysis, oil-gas vertical well skin coefficient calculation method, numerical simulation algorithm design and the like. Background technique [0002] The perforation process of oil and gas wells is to directly form a number of holes between the wellbore and the oil reservoir, and the oil and gas flows into the wellbore through these holes to be collected. On the one hand, high-quality, clean perforations can maximize the productivity of oil and gas wells; on the other hand, the perforation process will also cause great damage to oil and gas reservoirs, even more than the damage of drilling, thereby reducing the productivity of oil and gas wells. The production c...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
Inventor 徐玖平曾自强胡建成
Owner SICHUAN UNIV
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