Search citation statements
Paper Sections
Citation Types
Year Published
Publication Types
Relationship
Authors
Journals
The complex interbedded heterogeneous reservoirs of the Severo-Komsomolskoye field are developed by horizontal wells in which, as part of the pilot project's scope, autonomous inflow control devices (AICD) are installed to prevent early coning and gas breakthroughs in long horizontal sections and reduce sand production, which is a problem aggravated by an extremely low mechanical strength of the terrigenous deposits occurring in the Pokur formation of the Cenomanian stage in this area. The zones produced through AICDs are separated by swell packers. The issue of AICD effectiveness is discussed in the publications by Solovyev (2019), Shestov (2015), Byakov (2019) and some others. One of the methods used for monitoring horizontal sections with AICDs is production logging (PLT). However, due to the complexity of logging objectives, the use of conventional logging techniques makes the PLT unfeasible, considering the costs of preparing and carrying out the downhole operations. This paper provides some case studies of the Through-Barrier Diagnostics application, including passive spectral acoustics (spectral acoustic logging) and thermohydrodynamic modelling for the purpose of effective estimation of reservoir flows behind the liner with AICDs installed and well integrity diagnostics. As a result of the performed diagnostics, the well completion strategy was updated and optimised according to the log interpretation results, and one well intervention involving a cement squeeze with a straddle-packer assembly was carried out.
The complex interbedded heterogeneous reservoirs of the Severo-Komsomolskoye field are developed by horizontal wells in which, as part of the pilot project's scope, autonomous inflow control devices (AICD) are installed to prevent early coning and gas breakthroughs in long horizontal sections and reduce sand production, which is a problem aggravated by an extremely low mechanical strength of the terrigenous deposits occurring in the Pokur formation of the Cenomanian stage in this area. The zones produced through AICDs are separated by swell packers. The issue of AICD effectiveness is discussed in the publications by Solovyev (2019), Shestov (2015), Byakov (2019) and some others. One of the methods used for monitoring horizontal sections with AICDs is production logging (PLT). However, due to the complexity of logging objectives, the use of conventional logging techniques makes the PLT unfeasible, considering the costs of preparing and carrying out the downhole operations. This paper provides some case studies of the Through-Barrier Diagnostics application, including passive spectral acoustics (spectral acoustic logging) and thermohydrodynamic modelling for the purpose of effective estimation of reservoir flows behind the liner with AICDs installed and well integrity diagnostics. As a result of the performed diagnostics, the well completion strategy was updated and optimised according to the log interpretation results, and one well intervention involving a cement squeeze with a straddle-packer assembly was carried out.
The complex interbedded heterogeneous reservoirs of the Severo-Komsomolskoye field are developed by horizontal wells in which, as part of the pilot project's scope, autonomous inflow control devices (AICD) are installed to prevent early coning and gas breakthroughs in long horizontal sections and reduce sand production, which is a problem aggravated by an extremely low mechanical strength of the terrigenous deposits occurring in the Pokur formation of the Cenomanian stage in this area. The zones produced through AICDs are separated by swell packers. The issue of AICD effectiveness is discussed in the publications by Solovyev (2019), Shestov (2015), Byakov (2019) and some others. One of the methods used for monitoring horizontal sections with AICDs is production logging (PLT). However, due to the complexity of logging objectives, the use of conventional logging techniques makes the PLT unfeasible, considering the costs of preparing and carrying out the downhole operations. This paper provides some case studies of the Through-Barrier Diagnostics application, including passive spectral acoustics (spectral acoustic logging) and thermohydrodynamic modelling for the purpose of effective estimation of reservoir flows behind the liner with AICDs installed and well integrity diagnostics. As a result of the performed diagnostics, the well completion strategy was updated and optimised according to the log interpretation results, and one well intervention involving a cement squeeze with a straddle-packer assembly was carried out.
Evaluation of the initial reservoir pore pressure, the current average prevailing reservoir pressure, and the deliverability of a well commonly results in the need for one or more pressure or rate-transient tests of a well's performance to be conducted in order to properly characterize the properties of the reservoir and the well completion efficiency. Conventional pressure build up or multi-rate drawdown tests have commonly been used for this purpose. These types of transient tests can last for days or even months in low-permeability unconventional reservoirs, resulting in prohibitive production deferments and operational expenditure. The reservoir pressure and the well deliverability are key indices that are used to properly characterize the reservoir properties and the expected ultimate recovery of a well. This paper presents the development and application of an elegant production performance analysis technique that can be used to accurately determine the initial and/or average prevailing reservoir pressure of both conventional and unconventional reservoirs (for any permeability level), for wells of any type, time level, inner and outer boundary condition and flow regime, using only transient well production data (flow rates and bottom hole flowing pressures as a function of time). With the improvements in accuracy that can now be achieved in determining the average reservoir pressure, reliable and accurate transient Productivity Index values can be obtained for producing wells. In addition to the improvement in determining the initial/average reservoir pressure, the newly developed production analysis procedure also provides an excellent means of Quality Control for the validity and consistency in the reported well flow rates as a function of the system drawdown. Examples are presented in this paper in which a variety of different flow rate measurement or estimation techniques have been utilized. These include a state-of-the-art advanced and extremely accurate surface multiphase flow rate metering system, flow rates computed from downhole flow control valve measurements, as well as an example in which well flow rates have been estimated using measurements obtained for monitoring the performance of an electrical submersible pump. The acquisition of extremely accurate, high-frequency production performance data greatly enhances the evaluation of the reservoir pressure obtained with the analysis technique presented in this paper. Temporal measurements of the sandface flowing pressures and flow rates, obtained for a time scale on the order of minutes or hours is often adequate for accurately determining the initial or current average reservoir pressure. However, the use of high-frequency production data obtained with permanent downhole gauges and surface (or downhole) continuous flow rate metering systems offer even greater precision in evaluating the reservoir pressure with this analysis.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.