Automatic blending control method of oil field fracturing fluid

Abstract

The invention relates to an automatic blending control method of oil field fracturing fluid, which is mainly used for automatic blending control of fracturing fluid during fracturing operation of the oil field. In the method, the powder blanking speed is controlled by adjusting the output rate of a feeder; the clear water suction flow is controlled by adjusting a clean water suction pump so as to control the liquid level of a mixing tank; the liquid level of a hydration tank is controlled by adjusting a conveying pump; the flow of the fluid feed pump is adjusted according to the actual discharge flow and the set fluid feed proportion; and a discharge pump is controlled according to the actual discharge flow and the set discharge flow. The method can not only realize accurate, continuous and even charging and high-quality continuous liquid preparation, effectively remove water bag powder, but also can realize automatic control of a computer, and ensures that the matching and mixing speed is adjusted in real time and the fluid matching parameter is stored and recycled.

Description

technical field [0001] The invention relates to an automatic mixing control method of oilfield fracturing fluid, which is mainly used for automatic mixing control of fracturing fluid during oilfield fracturing operation. Background technique [0002] In recent years, some large and medium-sized oil fields have entered the stage of secondary oil recovery, and the most effective measure to increase production is to adopt fracturing and acidizing operations. The success of fracturing and acidizing operations largely depends on the quality of fracturing fluid. The traditional preparation method of fracturing fluid is: add water and thickener according to the total amount and mixing ratio in a fixed liquid distribution station or well site, and place it for a period of time after forced circulation to fully swell the thickener and water. So that the viscosity meets the design requirements. At present, high-quality continuous mixing of fracturing fluids is still a difficult prob...

AI Technical Summary

Problems solved by technology

At present, high-quality continuous mixing of fracturing fluids is still a difficult problem. The difficulty is that the thickener (guanil powder, etc.) is not easy to quickly affinity with water, and it is easy to form a large amount of powder in water (fish eyes). It takes a long time, more than 40 minutes

The produced fracturing fluid also has the following problems: it contains a large amount of powder in water, which leads to a large waste of powder, poor mixing quality, and low hydration viscosity; uneven feeding and uneven viscosity; slow swelling speed, and must be pre-mixed before operation. When the fracturing conditions change, the pre-mixed fracturing fluid is difficult to meet the new working conditions, which is easy to cause waste

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