Method and device for predicting productivity of gas storage gas water interaction area
A gas storage and interaction zone technology, which is applied in forecasting, instrumentation, data processing, etc., can solve the physical process that does not take into account the impact of gas-water displacement on production capacity and cannot accurately describe the multiple interactive displacement of gas and water And other issues
A gas storage and interaction zone technology, which is applied in forecasting, instrumentation, data processing, etc., can solve the physical process that does not take into account the impact of gas-water displacement on production capacity and cannot accurately describe the multiple interactive displacement of gas and water And other issues
CN104504472AActive Publication Date: 2015-04-08PETROCHINA CO LTD
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[0086] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0087] The inventors found that the existing methods for predicting the productivity of wells in the gas-water interaction area when water-flooded gas reservoirs are reconstructed into gas storages have limitations. , and it is impossible to predict the well productivity of the gas storage after deducting the influence of gas-water interaction displacement cycle by cycle. Based on this, in view of the shortcomings of the existing gas-water interaction area well productivity prediction methods, the operating process of the gas storage is deducted in the embodiment of th...
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The invention discloses a method and a device for predicting productivity of a gas storage gas water interaction area. The method comprises the following steps of determining the function relation between gas reservoir pure water influx and pressure, and according to the function relation, determining a study target well positioned in the gas water interaction area in a gas storage operation rebuilding process; processing gas reservoir development data or well test data of the study target well to obtain a gas well binomial deliverability equation, and determining the productivity-reducing influence factors of gas water interaction displacement; according to the productivity-reducing influence factors of gas water interaction displacement, designing a seepage test in a gas reservoir building process, and testing the change state of the gas phase permeability in each cycle of the designed service life of a gas reservoir; correcting the gas well binomial deliverability equation by the seepage test result to obtain the productivity of the study target well from which the seepage ability lost by gas water interaction displacement in a gas reservoir operation process is deducted. According to the method and the device provided by the invention, the accuracy of well productivity prediction of a water logging gas reservoir rebuilt gas reservoir can be improved.
Description
technical field [0001] The invention relates to the technical fields of natural gas underground storage, gas reservoir engineering and indoor experiments, and in particular to a method and device for predicting the productivity of a well in a gas-water interaction area of ββa gas storage. Background technique [0002] Gas storage is a powerful means to adjust the balance between supply and demand of natural gas. An important indicator to measure its adjustment ability is gas production capacity, which is realized by the production capacity of gas storage wells. Accurately predicting the production capacity of wells is a technical problem that plagues relevant researchers. [0003] At present, when predicting the productivity of gas storage wells reconstructed from water-flooded gas reservoirs, the influence of gas-water alternation on productivity is mostly not considered. For example, in the article "Operational Parameter Design of Reconstruction of Underground Gas Storage ...
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Patent Timeline
08 Apr 2015
Publication
CN104504472A
- IPC
- G06Q10/04; G06Q50/06
- CPC
- G06Q10/04; G06Q50/06
- Inventors
- εη«ζ Ή; ηηζ