Method for quantitatively evaluating offshore oil pool water injection development effect through tracer agent technology

Abstract

The invention provides a method for quantitatively evaluating an offshore oil pool water injection development effect through the tracer agent technology. The method comprises the steps that different tracer agents are added into different water wells in corresponding research well sets or corresponding research units in an oil pool numerical simulation model; the types of tracer agents produced by adjacent oil wells on the peripheries of all the water wells and the magnitude of the output quantity of the tracer agents are counted; the sources of the oil well tracer agents are determined according to the water injection wells; the communication effect situation of planes among oil-water wells is judged according to the magnitude of the output quantity of the tracer agents of all the oil wells and the types of the tracer agents, and whether equilibrium displacement of the planes is achieved or not is judged; the output types of tracer agents among oil well layers and the magnitude of the output quantity of the tracer agents are counted so that the corresponding displacement situations among longitudinal layers of the oil-water wells can be reflected; and whether equilibrium displacement of oil pool water injection development is achieved or not is evaluated. According to the method for quantitatively evaluating the offshore oil pool water injection development effect through the tracer agent technology, the problems that offshore oil pools are large in investment, difficult to operate and the like are achieved; the spot actual application cost of the tracer agents is greatly reduced; the offshore oil pool water injection development effect is rapidly evaluated; and the purpose of providing a dynamic allocation basis for a mine is achieved.

Description

technical field [0001] The invention relates to the field of high-speed and high-efficiency development of offshore oil reservoirs to enhance oil recovery, in particular to a method for quantitatively evaluating the water injection development effect of offshore oil reservoirs by using the reservoir numerical simulation tracer technology. Background technique [0002] my country's offshore oil reservoirs play an important role in oil development. Shengli Offshore Chengdao Oilfield is the first oilfield with an annual output of one million tons put into development and construction in my country's extremely shallow sea area. The oilfield is located in the extremely shallow sea area in the southern part of Bohai Bay. The conditions are complex, the environment is harsh, and it belongs to the offshore marginal oil field. The development of this oil field is directly related to the success or failure of the development of Shengli Offshore. Offshore oilfields have the characterist...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for quantitatively analyzing the effect of offshore waterflood development reservoir plane and interlayer balanced displacement waterflood development by using the reservoir numerical simulation tracer technology, so as to solve the problems of large investment and difficult operation of offshore oil reservoirs, and greatly Reduce the cost of actual tracer application on site, realize rapid evaluation of water injection development effect in offshore reservoirs, and achieve the purpose of providing dynamic allocation basis for mines

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