Overall optimization method for energy consumption of water-flooding oilfield injection-production system

Abstract

The invention provides an overall optimization method for energy consumption of a water-flooding oilfield injection-production system. The overall optimization method for energy consumption of the water-flooding oilfield injection-production system comprises the steps that 1, determining optimization model decision variables 2, determining an optimization model objective function; 3, determining constraint conditions of the optimization model; and 4, solving the optimization model by adopting a particle swarm algorithm in combination with numerical simulation. An oil reservoir system is used as a hub; energy consumption of water injection, oil deposit and lifting systems is comprehensively considered; related parameters are obtained by means of numerical simulation, an injection-productionsystem overall optimization model is established, an oil reservoir injection-production scheme is optimized, the total energy consumption of the injection-production system is optimized on the wholeunder the condition that the oil reservoir scheme is met, further energy conservation and consumption reduction under the condition that the oil reservoir scheme is met are achieved, and a new methodis provided for energy conservation and consumption reduction of an oil field.

Description

technical field [0001] The invention relates to the field of energy saving and consumption reduction in oil and gas field development, in particular to an overall optimization method for energy consumption of injection and production systems in water injection development oil fields. Background technique [0002] Water injection development refers to the process of artificially injecting water into the water injection well to replenish formation energy, driving oil to the bottom of the production well through water, and lifting the oil-water mixture to the surface through the oil well lifting system. A large amount of energy is consumed in the process of water injection development, and the cost directly affects the benefit of oilfield development. Improving the energy utilization level of oilfields plays a vital role in reducing oilfield operating costs and improving economic benefits. [0003] The oilfield injection and production system includes three subsystems: water i...

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Problems solved by technology

The method involved in this patent application is also an internal optimization of the lift system under known reservoir system conditions, and cannot be optimized overall considering the influence of the reservoir system and water injection system

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