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High-temperature high-pressure oil gas vertical well perforation parameter optimization method based on skin coefficient calculation

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

Active Publication Date: 2015-10-21
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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  • High-temperature high-pressure oil gas vertical well perforation parameter optimization method based on skin coefficient calculation
  • High-temperature high-pressure oil gas vertical well perforation parameter optimization method based on skin coefficient calculation
  • High-temperature high-pressure oil gas vertical well perforation parameter optimization method based on skin coefficient calculation

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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 gas reservoir exploitation engineering management, and especially relates to the construction of a high-temperature high-pressure oil gas vertical well perforation parameter optimization model, the oil gas reservoir seepage steady-state analysis, an oil gas vertical well skin coefficient calculation method, the numerical simulation algorithm design and the like. In order to achieve high-temperature high-pressure oil gas vertical well perforation parameter optimization, the invention provides a high-temperature high-pressure oil gas vertical well perforation parameter optimization method based on skin coefficient calculation. The high-temperature high-pressure oil gas vertical well perforation parameter optimization method comprises that A. a shaft flow model is constructed; B. a perforation parameter optimization model based on the skin effect is constructed; and C. the perforation parameter optimization model is solved. By selecting different perforation parameters, corresponding optimization models and optimization schemes can be obtained, influence of different perforation parameters on the productivity can be analyzed, a theoretical basis can be provided for the selection of perforation parameters, and the high-temperature high-pressure oil gas vertical well perforation parameter optimization method is important to the increase of the vertical well productivity, the improvement of the inflow profile and stable well tests.

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 Applications(China)
IPC IPC(8): E21B49/00
Inventor 徐玖平曾自强胡建成
Owner SICHUAN UNIV
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