Comprehensive evaluation and prevention method for seepage field of operation-period underground water-sealed oil storage

A comprehensive evaluation, seepage field technology, applied in geophysical measurement, permeability/surface area analysis, instruments, etc., can solve problems such as inappropriate adjustment of water curtain system, untimely adjustment of water curtain system, high operating cost of underground oil depots, and large water inflow, etc. The effect of reducing operating costs and risks, low oil leakage, and high adjustment accuracy

Active Publication Date: 2020-06-09
SHANDONG UNIV
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Problems solved by technology

[0005] In order to solve the above problems, the present invention proposes a comprehensive evaluation and prevention system and method for the seepage

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  • Comprehensive evaluation and prevention method for seepage field of operation-period underground water-sealed oil storage
  • Comprehensive evaluation and prevention method for seepage field of operation-period underground water-sealed oil storage

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Embodiment 1

[0033] Applicable to the comprehensive evaluation and prevention methods of the seepage field of underground water-sealed oil storage depots during the operation period, including:

[0034] Obtain the hydrogeological data of the underground oil depot during the whole phase of the survey period, construction period and operation period. At the end of the construction period, it is necessary to judge whether the water curtain system is implemented or not. After entering the operation stage, according to the combination of three methods of time series analysis, finite element analysis and nonlinear analysis, the monitoring real value, predicted value and numerical calculation simulation value of the seepage pressure, water inflow and other elements of the operating oil depot are obtained. These data can be used to make a comprehensive evaluation of the seepage field of the oil depot during the operation period, and the evaluation results reflect the operation of the oil depot.

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Abstract

The invention discloses a comprehensive evaluation and prevention method for a seepage field of an underground water seal oil storage in an operation period, and the method combines engineering geology and hydrogeological reports, and obtains hydrological survey data in a survey period. The daily water inflow of the reservoir site area is counted by combining the construction period with the actual situation, and the drilling water level change value is periodically observed and recorded. And underground water distribution of an unexcavated surrounding rock area is detected through a geological advanced prediction method, and whether a water curtain system is additionally arranged or not is judged. The pumping capacity of the water pump station and the osmotic pressure value of the oil storage cavern surrounding rock during operation are counted. A time sequence analysis method, a finite element analysis method and a nonlinear method BP neural network are combined, comprehensive analysis and evaluation are conducted on the seepage field of the underground oil depot in the operation period, the benefit of a water curtain system is evaluated, and an adjustment scheme is given.

Description

technical field [0001] The invention relates to the research field of underground water-sealed oil storage depots, in particular to a comprehensive evaluation and prevention system and method for seepage field of underground water-sealed oil storage depots during the operation period. Background technique [0002] China's crude oil imports in 2018 were 462 million tons, and its dependence on foreign countries was as high as 70.9%. After the completion of the second phase of the National Petroleum Reserve Project, China's oil reserves will be about 40 days of national oil consumption, which is still far below the 90-day reserve required by the International Energy Agency. There is an urgent need to build more oil reserves. Compared with traditional oil storage methods, underground oil storage has attracted the attention of countries all over the world as a safer, more environmentally friendly, less investment, and lower operating cost oil storage method. Underground oil stor...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/02G06Q50/08G06F30/23G06F30/27G06F30/13G01N15/08G01V11/00
CPCG06Q10/0639G06Q50/02G01N15/0826G01V11/00Y02A10/40
Inventor 薛翊国宁泽旭傅康李广坤公惠民
Owner SHANDONG UNIV
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