Production Increase in an Onshore Oilfield Using a Rapid Screening and Multidisciplinary Approach Conference Paper uri icon

abstract

  • Abstract A natural phase in the life of oilfields is the maturation phase where the field undergoes all or some of situations as decline in pressure, increase in water and/or gas production, and fluid contact movement. Reservoir management practices require identifying these oilfield challenges and coming up with solutions to maximize production from such fields adapted to the uniqueness of the wells and reservoirs in the field. This paper discusses a novel multidisciplinary and rapid screening methodology for identifying well intervention candidates. The methodology adopted to evaluate production increase opportunities was on field and well bases. Geology, Petrophysics, Reservoir Engineering, Production Technology, Production Engineering and Completions Engineering disciplines were involved in this study. The field assessment started with the field production performance review using a production surveillance and forecasting tool. This was combined with a holistic field geological review of the static models and well logs on a shared-earth modelling software and a wellbore-centric data integration and interpretation software respectively. Based on the field assessment review, reservoirs were ranked based on remaining oil in place and cumulative production. Results of the field assessment were then fed into the single well assessment phase where individual well performance was reviewed using the production surveillance and forecasting software. This production surveillance and diagnosis was done vis-a-vis a multidisciplinary workflow of integrating reservoir models, well logs, fluid contact interpretations, pressure data, historical production, completion designs and information from previous workover operations and well surveillance reports. This workflow identified possible candidates where well intervention could be done, the type of well intervention and production enhancement operations that could be deployed, and the order to which the interventions should take place based on cost and potential gains. However, to estimate the incremental production that could be derived from the proposed well interventions, a workflow coupling single well predictive modelling and production systems analysis was done, which was further used to rank the wells. Implementing the recommendations from the rapid screening and ranking workflow resulted in incremental production of 3300 bopd from the few intervention operations executed. The results also validated the predictions made during the rapid screening study. This paper thus demonstrates the added value in a multidisciplinary approach to screening and identifying candidates for well intervention, to extend the life of producing wells and ultimately increase field production.

name of conference

  • Day 3 Wed, August 02, 2017

author list (cited authors)

  • Okoroafor, E. R., Obi, C., Akenobo, C., Dagogo-Jack, C. D., Nnebocha, E., Okeke, U., ... Mezie-Okoye, S.

complete list of authors

  • Okoroafor, Esuru Rita||Obi, Chinyere||Akenobo, Charles||Dagogo-Jack, Cyrusba D||Nnebocha, Ezinne||Okeke, Uche||Arasi, Quadri||Ogbidi, Lymmy||Mezie-Okoye, Somto

publication date

  • July 2017