Technology and system for producing multi-component thermal fluid in ocean platform

Abstract

The invention discloses a technology for producing multi-component thermal fluid in an ocean platform. The technology comprises steps as follows: air and crude oil are supercharged and injected into afuel oil steam boiler; the supercharged crude oil is burnt in the fuel oil steam boiler, exhaust gas is produced, heat is released, and steam is produced; the produced exhaust gas is subjected to dust removing, desulfuration and denitration treatment; the treated exhaust gas is dehydrated, filtered and supercharged, and a corrosion inhibitor is injected into the supercharged exhaust gas; the produced steam is mixed with the supercharged exhaust gas, and the multi-component thermal fluid with an adjustable gas-liquid ratio is obtained. The invention further discloses a system for implementingthe technology. The system comprises an air compression device, a crude oil supply device, a water supply device, the fuel oil steam boiler, an exhaust gas purification device, an exhaust gas supercharging device and a chemical injection device. The multi-component thermal fluid with the adjustable gas-liquid ratio meets demands of different types of oil reservoirs; the problems that an existing system occupies a large area and is higher in energy consumption are solved.

Description

technical field [0001] The present application relates to but not limited to the petroleum field, and particularly relates to but not limited to a process and a system for producing an environment-friendly mixed multi-component thermal fluid in an offshore platform. Background technique [0002] Multivariate thermal fluid is a kind of water vapor, N 2 , CO 2 And other components, high temperature fluid used for enhanced recovery in heavy oil fields. Since 2008, the multiple thermal fluid thermal recovery technology has been successfully implemented on offshore platforms for more than 30 well times, and the production capacity of single well thermal recovery is 2 to 3 times higher than that of cold recovery, providing technical support for the efficient development of offshore heavy oil fields. [0003] Existing multi-element thermal fluid production process (referring to Chinese patent CN1804366A) utilizes the combustion injection mechanism of aerospace rocket engine, fuel...

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Problems solved by technology

[0004] Due to the small space of the offshore platform and the shortage of fresh water and power resources, the above multi-element thermal fluid generation processes cannot solve the problems of large footprint, high energy consumption, and high heat enthalpy of air, oxygen-enriched air or nitrogen high-pressure supply systems. The low water vapor injection rate seriously restricts the large-scale thermal recovery development process of offshore heavy oil fields

In addition, the existing multi-component thermal fluid generation process cannot avoid the problem of air pollution caused by the exhaust gas containing sulfur dioxide, nitrogen oxides, dust and other components generated by the combustion of small steam boilers. If the conventional flue gas desulfurization and denitrification process is adopted, it is inevitable To generate waste water containing a large amount of soot, oil, heavy metals, etc., it is necessary to increase the waste water treatment system, the cost and energy consumption will increase, and the volume is large, so it is not suitable to be installed on the offshore platform

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