Optimization of Nitrogen Lifting Operation in Horizontal Wells of Carbonate Formation

Usman Iftikhar Hashmi, Samuel osisanya, Motiur Rahman, Bisweswar Ghosh, Maad Hasan Subaihi, Husam F. Bin Kuwair, Ahmed Fathy, Clement Afagwu, Mohamed Mahmoud

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    1 Scopus citations


    Specialized operations such as Nitro-logging require nitrogen injection in the open hole. The operating parameters of a nitrogen lifting operation in the open hole depend upon several factors that need to be considered which are discussed and optimized in this paper. A decision matrix is created to show the optimum injection rate for nitrogen for different reservoir parameters. In addition, the effect of several completion components is also discussed that can aid in operation. In this project, we examine these factors and deduce the optimum operational conditions for each case based on reservoir and well condition. The controllable operational conditions are gas injection rate and pressure. Different combinations of water cut (WC), reservoir pressure, gas-oil-ratio (GOR), and productivity index (J) are simulated in Wellflo® to predict production in each case. Optimum Economic Factor (OEF), calcultates the efficiency of operation in each case which entails a well's production rate, length of operation, and amount of nitrogen used. The optimum operational conditions are used to populate a decision matrix that incorporates all the examined factors. The analysis of the decision matrix led to the identification of different trends between the operational conditions and reservoir parameters. The main findings were that a higher gas injection rate was required to lift higher WC wells, especially wells with WC greater than 60%. Moreover, wells with GOR less than 1700 scf/stb or wells with J lower than 1 stb/d/psi or wells with reservoir pressure below 2500 psi also required higher gas injection rates. The effects were direr when the well met more than one of these parameters. Additionally, as coiled tubing size increases from 1.25 to 1.5 to 2", liquid production decreased from 2250 to 1960 to 1280 bbl/d, respectively. Studying the back pressure from facilities showed that as pressure increased from 0 to 400 to 1000psi, liquid production reduced as well from 700 to 450 to 100 bbl/d, respectively. Considerable economic reduction can be achieved if the operation is optimized as per the results of this project. Overall, the decision matrix eases the operation's planning and execution time while optimizing the quantity of nitrogen gas used.

    Original languageBritish English
    Title of host publicationInternational Petroleum Technology Conference, IPTC 2022
    ISBN (Electronic)9781613998335
    StatePublished - 2022
    Event2022 International Petroleum Technology Conference, IPTC 2022 - Riyadh, Saudi Arabia
    Duration: 21 Feb 202223 Feb 2022

    Publication series

    NameInternational Petroleum Technology Conference, IPTC 2022


    Conference2022 International Petroleum Technology Conference, IPTC 2022
    Country/TerritorySaudi Arabia


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