Extraction of interference from long-term transient pressure using multi-well deconvolution algorithm for well test analysis

Shiyi Zheng, Fei Wang

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    7 Citations (Scopus)

    Abstract

    Interference effect between wells is very common in mature reservoirs. This is particularly true for transient pressure data from permanent down-hole gauges (PDG). As soon as the recorded pressure interfered by the pressure disturbance from other wells nearby, the PDG pressure becomes the product of two components, i.e. self response due to the well production and interference from neighbouring wells. This combined pressure data recorded by the PDG has a nonlinear nature, which can not be analysed by traditional well testing principles such as superposition or deconvolution. There are two approaches handling this type of data. One is numerical well testing designed for solving well testing problems in a nonlinear reservoir system. Another is to pre-process the data by decomposing the total pressure response into linear reservoir response and the component that causes the nonlinearity of the response, i.e. interference effect. Thereafter, the extracted interference data can be analysed as interference test, and the remaining data can be analysed by traditional well testing methods. This paper presents a newly developed multi-well deconvolution algorithm specially designed for analysing long term transient pressure with interference. The procedures include firstly, the diagnostic of the reservoir system response for the nonlinearity. As soon as the reason causing this nonlinearity is found, in this presented case, is due to interference, the following step is to extract the interference from the total pressure response. Then, the analysis of the decomposed data can be made using the available traditional well testing methods. Numerical well testing synthetic studies were performed to demonstrate these procedures. The study results proved that the new method appeared to work well in homogeneous reservoirs with wells flowing at single phase, single and multiple rates. The potential in further developing this technique for practical application is obvious and looks very promising. Copyright 2010, Society of Petroleum Engineers.

    Original languageEnglish
    Title of host publicationSociety of Petroleum Engineers - International Oil and Gas Conference and Exhibition in China 2010, IOGCEC
    Pages1626-1643
    Number of pages18
    Volume2
    DOIs
    Publication statusPublished - 2010
    EventInternational Oil and Gas Conference and Exhibition in China 2010: Opportunities and Challenges in a Volatile Environment - Beijing, China
    Duration: 8 Jun 201010 Jun 2010

    Conference

    ConferenceInternational Oil and Gas Conference and Exhibition in China 2010: Opportunities and Challenges in a Volatile Environment
    Abbreviated titleIOGCEC
    CountryChina
    CityBeijing
    Period8/06/1010/06/10

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  • Cite this

    Zheng, S., & Wang, F. (2010). Extraction of interference from long-term transient pressure using multi-well deconvolution algorithm for well test analysis. In Society of Petroleum Engineers - International Oil and Gas Conference and Exhibition in China 2010, IOGCEC (Vol. 2, pp. 1626-1643) https://doi.org/doi:10.2118/131294-MS