Oil field individual well tank oil transportation and heating method

Abstract

The invention provides an oil filling and heating method for oil field single-well tank. To address the problem that all the heat exchanger are arranged at the bottom of the oil tank to cause heat waste and low heating efficiency, the invention determines the oil / water interface of the single-well tank according to the water ratio of the crude oil, and the area of the heat exchangers above the oil / water interface is arranged as follows: the ratio of the area of the heat exchangers above the oil / water interface in the total area of the heat exchangers is equal to 100 percent subtracted water ratio of the crude oil added or subtracted 10 percent. According to the weight of the crude oil, the invention reasonably arranges the area of the heat exchangers, thus capable of fully heating the crude oil and avoiding excessive heat loss in the heating process due to that the temperature is much higher than that of the crude oil; thereby the energy-saving effect is very significant.

Description

technical field [0001] The invention relates to a method for heating crude oil in a single well tank in an oil field. Background technique [0002] The lower limit temperature of the freezing point of crude oil is basically above 33°C, and the freezing point of crude oil in some blocks is as high as 48°C. Therefore, the single well tank must be heated before oil transportation throughout the year to raise the temperature of the crude oil in the tank above the freezing point to ensure that the crude oil is in a liquid state, so that on output. The current advanced heating method is to install a circulating medium heat exchanger in the single well tank, which has many advantages compared with external heating and built-in electric heating rod heating, but the setting of the heat exchanger in the single well tank is unscientific, and it is simply based on the heat rise Principle The heat exchanger is installed at the bottom of the tank. Since the water content of the crude oil...

AI Technical Summary

Problems solved by technology

The current advanced heating method is to install a circulating medium heat exchanger in the single well tank, which has many advantages compared with external heating and built-in electric heating rod heating, but the setting of the heat exchanger in the single well tank is unscientific, and it is simply based on the heat rise Principle The heat exchanger is installed at the bottom of the tank. Since the water content of the crude oil of each oil well is different, it is generally between 10-80%, and most of it is above 30%. As a result, most of the heat exchangers are in water, and a large amount of heat is used for heating. Water and crude oil only get a small amount of heat, and water can only be vaporized when it reaches above 80°C, and the heat can be sent to the oil surface. Before vaporization, the water is scalding. Therefore, this heating method has low thermal efficiency and wastes a lot of energy.