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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.

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Multistage fracturing is widely used in Western Siberia for stimulation of a wide variety of formations from "Ryabchik" (relatively shallow highly layered sandstone formation in the Samotlor Field) to Achimov (a high pressure, high temperature formation of tight sandstone). One of the formation groups that is not typically stimulated by fracturing is a Pokur formation series. A typical Pokur reservoir is an unconsolidated heavy oil bearing sandstone reservoir of Cennomanian age, and the reason for not using fracturing on these formations is the numerous geological and technological risks. This paper focuses on the first successful experience of multistage fracturing of the Pokur reservoir with a completion system equipped with both sand screens and frac sleeves in the Vostochno-Messoyakhskoe Field. This paper is a continuation of papers SPE-187682 and SPE-191477. The results of pilot projects described in these papers enabled a high-tech and complex operation of multistage fracturing in complicated well conditions of Pokur reservoirs with a completion system optimized for these conditions. This application required high caliber engineering along with careful planning and preparation to be successful. Despite the high number of completion systems that combine both sand screen and frac sleeve technology available on the market, successful implementation of such systems was previously impossible. The reasons for this were equipment design limitations, high complexity of screens and sleeves operation, and high cost due to foreign origin of the equipment. These limitations we overcome through optimization of the permanent and service equipment deployed. Localization of the products significantly reduced the cost of tools.