An early warning analysis method for oilfield block casing damage risk
A risk early warning and analysis method technology, applied in data processing applications, instruments, calculations, etc., can solve the problem of large-area timely early warning that cannot give the main influencing factors and treatment countermeasures of casing damage, so as to reduce a large number of workover costs and reduce The probability of casing damage and the effect of ensuring normal production
Active Publication Date: 2020-05-19
PETROCHINA CO LTD +1
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Problems solved by technology
[0004] The present invention aims to overcome the problems that the existing casing damage prediction methods in the background technology cannot achieve timely early warning for large areas, and cannot give the main influencing factors and control measures of casing damage, and provides a method for early warning and analysis of casing damage risks in oilfield blocks
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Embodiment 1
[0015] The implementation process of the method of the present invention will be described below by taking the early warning of casing damage risk in 98 blocks of Daqing Changyuan Oilfield as an example.
[0016] At present, the cumulative casing damage rate of Daqing Changyuan Oilfield has reached more than 25%, and there are about 1,200 new casing damage wells each year, and the casing damage wells show a trend of increasing year by year. Especially after 2008, concentrated casing damage occurred in some areas, resulting in a well operating rate of less than 70% in the concentrated casing damage area, affecting about 20% of the annual oil production of the block. The casing damage early warning method based on fluid-solid coupling cannot realize the real-time early warning of casing damage in macroscopic multi-blocks due to the limitation of the scale of the work area and the model nodes.
[0017] For this reason, the casing damage risk early warning analysis method for oil ...
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The invention relates to an oil field block casing damage risk early warning analysis method and solves problems that a casing damage forecasting method in the prior art can not realize large-scale timely early warning and can not provide main casing damage influence factors or treatment countermeasures. The method comprises steps that 1), a casing damage early warning index system of geological factors is established; 2), geological factor casing damage risk grades of blocks are divided; 3), a casing damage early warning index system of development factors is established; 4), a casing damage early warning model is established; and 5), casing damage risk early warning is carried out. Through the method, casing damage risk blocks can be rapidly discovered in advance, casing damage risk index early warning is realized, so regulation and control in advance can be realized, a casing damage generation rate is reduced, and a high casing damage risk coincidence rate reaching 79% is realized through model calculation.
Description
Technical field: [0001] The invention relates to an early warning analysis method in the technical field of oil and gas field casing damage prevention, in particular to an early warning analysis method for oil field block casing damage risk. Background technique: [0002] The problem of casing damage has always been a problem that plagues the development of old oilfields. Due to casing damage, a large number of production wells have been abandoned, which seriously affects the production of oilfields. economic loss. For example, the cumulative casing damage rate of Daqing Changyuan Oilfield has reached more than 25%, especially after 2008, concentrated casing damage occurred in some areas, resulting in a lower than 70% well operation rate in the concentrated casing damage area, affecting about 20% of block production . [0003] Casing damage is closely related to geological and development factors, and is the result of long-term and joint effects of various factors. In ter...
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IPC IPC(8): G06Q10/06G06Q50/02
CPCG06Q10/0635G06Q50/02
Inventor 张淑娟姜雪岩赵春宇王治国刘海龙王贺军刘庆红
Owner PETROCHINA CO LTD