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Greater part of new gas-oil fields in Western Siberia are characterized by extensive gas caps, less oil net pay and underlying water saturated intervals. Determine the major criterion for successful release of application of autonomous inflow control devices (AICD) in objects of the Vostochno-Messoyakhskoye field and methodology of searching for candidate wells. This article presents experience of using AICD on the wells of the PK1-3 and MKH8-9 formations, and results of multiple-path simulation. The article describes features of simulation modeling of AICD such as initialization of multi-segment wells, creating virtual ICD and estimating of its parameters, as well as methods of history matching of AICD-wells. Efficiency of AICD depending on the geological and technological features: distance to GOC, OWC to well, spreading of permeability along near-wellbore formation, compartmentalization. To calculate influence of these parameters, multivariate calculations performed on synthetic hydrodynamic models. To determine optimum of AICD working and select candidate wells was calculated various geological and geophysical characteristics: depth of GOC and WOC, properties of fluids, heterogeneity of reservoir properties. Based on results of this research, optimal geological and geophysics conditions for wells of the "Vostochno-Messoyakhskoye" field were defined. Methods and outputs of this article can be used to solve same issues in similar formations and development schemes.
Greater part of new gas-oil fields in Western Siberia are characterized by extensive gas caps, less oil net pay and underlying water saturated intervals. Determine the major criterion for successful release of application of autonomous inflow control devices (AICD) in objects of the Vostochno-Messoyakhskoye field and methodology of searching for candidate wells. This article presents experience of using AICD on the wells of the PK1-3 and MKH8-9 formations, and results of multiple-path simulation. The article describes features of simulation modeling of AICD such as initialization of multi-segment wells, creating virtual ICD and estimating of its parameters, as well as methods of history matching of AICD-wells. Efficiency of AICD depending on the geological and technological features: distance to GOC, OWC to well, spreading of permeability along near-wellbore formation, compartmentalization. To calculate influence of these parameters, multivariate calculations performed on synthetic hydrodynamic models. To determine optimum of AICD working and select candidate wells was calculated various geological and geophysical characteristics: depth of GOC and WOC, properties of fluids, heterogeneity of reservoir properties. Based on results of this research, optimal geological and geophysics conditions for wells of the "Vostochno-Messoyakhskoye" field were defined. Methods and outputs of this article can be used to solve same issues in similar formations and development schemes.
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.
Horizontal wells has been used across fractured reservoirs for field development, in presence of ununiformed water/gas saturation, introducing challenges for reservoir management. Premature water/gas production cause a higher bypassed oil, impacting its recovery and the business profitability. Wells performance can be enhanced through advanced and sustainable technologies, conveying in the use of integrated lower completion (i.e. ICV, ICD/AICD, DHPG, PPL). This paper discusses well/reservoir criteria, completion design and impact of incorporating these technologies in the Reservoir 1 development plan. Early water/gas breakthrough, zonal isolation, cost, well productivity, complexity of deployment, and material availability have been part of the essentials to be considered in the process workflow from planning, execution and deployment phase. Dedicated Steady-state numerical solutions inflow parameters such as permeability and water-cut profiles modeling were carried out to provide the most suitable lower completion design. The simulation was performed for separate scenarios where Flow control devices (FCD) and Intelligent Completion IC were incrementally implemented. The outcomes were compared in terms of well cumulative oil and water/gas production thru the scenarios and their value quantified. This opportunity screening and lower completion design (LCD) workflow have recently been applied at Reservoir 1 development plan. Based on the simulation cases outcomes, Six (6) new wells drilled in 2020-2022 are provided with FCD, IC, PPL expecting an incremental oil production and oil recovery with less gas and less water production consequently prolonging the well life. In Addition with the environmental benefits associated with less emissions that are achieved by reducing un-wanted fluids production. There is a planned to be drilled three (3) more wells with LCD in the next five years as part of the new field development strategies that will improve the sweeping efficiency and oil recovery tackling the production of undesired fluids in a proactive manner. Less associated emissions – The environmental benefits are achieved by reducing gas and water production, which supports company's commitments to emissions reduction target within their total production operations.
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