Multinode Intelligent-Well Technology for Active Inflow Control in Horizontal Wells

Although research into water control completion techniques is now relatively mature, there are still difficulties in controlling water in fractured gas reservoirs in the sea. Unlike oil reservoirs, submerged gas reservoir development still faces some problems. To explore the water control mechanism of buried hill fractured gas reservoir, based on the parameters of well HZ26-6-2 in HZ 26-6 condensate gas field, the water control experiment of the continuous packer in the bottom water gas reservoir was completed through the design of experimental parameters, the design of buried hill fractured formation, and the process design of continuous packer. Studies have shown that the continuous packer water control technology delays the water coning rate and makes the water propulsion more uniform. The water breakthrough time and gas production are slightly different for different fractured gas reservoirs, and the network fracture model has a short gas recovery period and fast gas production speed. Continuous packer water control can improve natural gas recovery by 14.3% in fractured gas reservoir. Based on fracture dredging ability, sand accumulation and filling degree, and drilling and production strategy, the influencing factors of horizontal well water control effect in buried hill fractured gas reservoir are discussed and summarized. The research results are aimed at establishing a development model of water control for buried hill gas reservoirs and providing good technical support for rational and scientific water control of horizontal Wells in offshore condensate gas fields. The findings of this study can help for a better understanding of water control of horizontal wells in offshore condensate gas fields.

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Increasing Oil Recovery from Long Horizontal Wells Using Advanced Lower Completion Systems

Joseph

Galimzyanov

Nazarenko

2014

SPE Annual Technical Conference and Exhibition

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Horizontal openhole wells are becoming common in current field developments. The main advantage of horizontal wells is that they increase drainage area, resulting in improved recovery. However, horizontal wells produce some challenges. Frictional pressure drop from toe to heel and breakthrough anywhere in the well due to permeability variation along the horizontal section lead to water or gas coning toward the heel of the well. To manage and overcome these challenges in horizontal wells, the industry developed advanced lower completion systems.Existing completion technologies used in these long wells are typically passive systems. These systems, which include inflow control devices (ICD) designed with torturous paths or orifices, have limited ability to manage water breakthrough that leads to lower ultimate recovery. Hydraulic systems use inflow control valves (ICV) that can be actuated from the surface. The number of available wellhead penetrations limits the number of ICVs that can be deployed within the completion string. Electric systems with multiple active flow control devices (AFCD) on a single tubing encased conductor (TEC) can address the water breakthrough issue economically in extended-reach wells. The single TEC line requires only one penetration at the tubing hanger.This paper evaluates and compares the cumulative oil production for ICD, ICV and AFCD devices. Input data from multiple wells was used to compare the oil production of systems incorporating these devices over a period of a few years. Near-wellbore simulations and data analysis clearly show the increased oil recovery potential of using completion systems with AFCDs. This system on a single TEC can be installed to compartmentalize a long horizontal well into more than 20 isolation zones. The compartment is created by an openhole packer, and each zone typically has at least one AFCD. Each AFCD can achieve ON and OFF positions and various intermediate choking positions. Choke settings can be customized to specifications. Each AFCD can be selectively actuated to a choke position remotely from the surface to control water-producing zones.Completion systems with AFCDs are poised to give the industry the ability to remotely control water breakthrough and optimize production in long horizontal wells. This paper shows how different types of completion technologies can help accomplish real-time wellbore equalization that leads to increased oil recovery. An intelligent completion system with these active flow control devices provides our industry complete control of a field through proactive and reactive reservoir management, increasing the ultimate recovery rates.

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Multinode Intelligent-Well Technology for Active Inflow Control in Horizontal Wells

Cited by 5 publications

References 11 publications

A New Completion Methodology to Improve Oil Recovery for Horizontal Wells Completed in Highly Heterogeneous Reservoirs

A New Completion Methodology to Improve Oil Recovery for Horizontal Wells Completed in Highly Heterogeneous Reservoirs

Experimental Evaluation of Water Control for Continuous Packer in Buried Hill Fractured Gas Reservoir: A Case Study of HZ 26-6 Condensate Gas Field

Increasing Oil Recovery from Long Horizontal Wells Using Advanced Lower Completion Systems

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