Ultra-high pressure gas reservoir production dynamic abnormal data diagnosis and correction method
A technology for producing dynamic and abnormal data, applied in earthwork drilling, measurement, wellbore/well components, etc., which can solve problems such as short production time, complicated calculation process, and heavy workload
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[0055] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and 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.
[0056] The inventor found that in the existing diagnosis and identification of abnormal production curves, the calculation process of the standard characteristic curve is complicated and the workload is large, which is not conducive to daily mine analysis and calculation, and is limited in practical application; in the existing gas well production In terms of data tracking and correction, due to the short normal production time of gas wells, when using the existing single well simulation method to calculate the bottom hole flow pressure, it is impossible to consider the changes in the number of ...
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and pressure p, and between high-pressure stage normalization pseudo-pressure p
and apparent formation pressure p/z are adopted, the normalization pseudo-pressure yield qg/Delta p
and substance balance pseudo-time t<ca> in Pslacio-Blasingame and Agarwal-Gardner decline curves are simplified, a standard flow characteristic curve of an ultra-high pressure gas well is established; the actual production curve of the ultra-high pressure gas well is compared with the standard flow characteristic curve of the ultra-high pressure gas well, so as to judge whether the actual production curve of the ultra-high pressure gas well is abnormal or not and judge the causes of abnormity. The calculation process of the established standard flow characteristic curve of the ultra-high pressure gas well is simple and the work load is small, and the calculation process facilitates on-site application; establishment of the ultra-high pressure abnormal well well-bottom flow pressure tracking and correction method considers the effects of change in the number of the communicated gas reservoir production wells and the gas well production adjustment on well controllable reserves, and thus the forecast result error is reduced.
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