Supercritical multisource multielement thermal fluid injection-production system and injection-production method

Abstract

The invention discloses a supercritical multisource multielement thermal fluid injection-production system and injection-production method. The system comprises a supercritical multisource multielement thermal fluid generating system and an oil tube. The oil tube is arranged in an exploiting shaft; the supercritical multisource multielement thermal fluid generating system comprises a supercritical gasification reactor and a supercritical mixed combustion reactor; in the presence of supercritical water, a gasification reaction is performed on fuel slurry in the supercritical gasification reactor, and the gasification product of the reaction and oxygen-containing gas dissolved in the supercritical water combust in the supercritical mixed combustion reactor to form a supercritical multisource multielement thermal fluid containing supercritical water and carbon dioxide; the supercritical mixed combustion reactor is connected to the oil tube. The supercritical multisource multielement thermal fluid injection-production system provided by the invention has the effects that thermal efficiency is high, the viscosity of thickened oil is reduced, the flowability of the thickened oil is improved and the recovery efficiency is increased.

Description

technical field [0001] The invention relates to the field of energy exploitation, in particular to a supercritical multi-source multivariate thermal fluid injection-production system and an injection-production method for exploiting heavy oil reservoirs. Background technique [0002] Heavy oil resources are extremely rich in the world, and its geological reserves far exceed conventional crude oil. According to statistics, the proven geological reserves of conventional crude oil in the world are about 420 billion tons, while the geological reserves of heavy oil (including bitumen) reservoirs are as high as 1.55 trillion tons. Taking my country's Bohai Oilfield as an example, the proven reserves of heavy oil in the Bohai Sea by the end of December 2009 were 20.5*108m 3 . Reducing costs and maximizing the extraction of heavy oil and super heavy oil are common issues facing the oil industry in the world today. [0003] Thermal oil recovery technology is a commonly used method...

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Problems solved by technology

[0006] In addition, a large amount of oil production wastewater / high-concentration oily wastewater will be generated during heavy oil injection and production, which will have a negative impact on the environment

In particular, the supercritical multi-source multi-element thermal fluid technology used in the development of heavy oil on offshore platforms relies heavily on diesel as fuel, and the cost of diesel is high, and the transportation costs are high; Meeting discharge standards requires the use of complex water treatment equipment

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