Integrated skid-mounted continuous mixing device and technology for acid liquor

Abstract

The invention discloses an integrated skid-mounted continuous mixing device for acid liquor. The device is controlled by a PLC control system and integrates functions of a balance pumper and an acid mixing device. A liquor supply system comprises a liquor tank and a left centrifugal pump unit which are sequentially connected, a metering system comprises an electronic metering valve and a metering tank unit which are sequentially connected, a liquor preparing system comprises a powder fluidization metering device, an acid mixing tank and a PH meter unit which are sequentially connected, a pumping system comprises a right centrifugal pump and a three-cylinder plunger pump unit which are sequentially connected, a process manifold comprises pipelines or pipes and pneumatic valves, and the liquor supply system, the metering system, the liquor preparing system and the pumping system are connected through the manifold. The device has the benefits as follows: continuous mixing is realized; mixing of solid phase and liquid phase chemical materials, well washing, continuous acid injection, plug removal operation and the like are finished by the same vehicle; the device can be transported and used on field sites conveniently; the device can realize continuous and uniform liquor preparation and is high in speed; precise control and detection of preparation effect can be realized; liquor preparation can be finished automatically according to site requirements.

Description

technical field [0001] The invention relates to the technical field of petroleum development, in particular to an integrated skid-mounted acid liquid continuous mixing device and process. Background technique [0002] Acidizing technology is a process technology that uses the acid liquid pumped into the oil layer to react chemically with the minerals or cement in the oil layer to generate soluble substances to improve the seepage capacity of the oil layer or remove the clogging of the oil layer. At present, acidizing operation is widely used as an effective stimulation method for carbonate reservoirs. The conventional acidizing process usually has the following problems: [0003] 1. Before the acidizing operation, it is necessary to carry out manual acid preparation on site. This method cannot accurately prepare the acid solution of the required concentration; [0004] 2. Due to the lack of effective monitoring in the traditional liquid preparation process, the control ac...

AI Technical Summary

Problems solved by technology

[0003] 1. Before the acidification operation, it is necessary to carry out manual acid preparation on site

This method cannot accurately prepare the acid solution of the required concentration;

[0004] 2. Due to the lack of effective monitoring in the traditional liquid preparation process, the control accuracy of the acid liquid mixing and adding ratio is low, the mixing effect is poor, and the best acidizing effect cannot be achieved;

[0005] 3. For dragging acidification or acid fracturing for wells with large displacement and high pressure, the acid concentration is usually adjusted according to the construction requirements of different layers, and additional equipment that can control the flow of suction liquid and additional storage are required. Stir the mixing tank, which will increase the equipment footprint and equipment cost; and the two sets of equipment can only mix first and then inject, and cannot realize the function of injecting while mixing;

[0006] 4. During the acidizing operation, it is necessary to add auxiliary operations such as well washing and plugging removal according to the construction requirements, and additional special pump trucks are required;

[0007] 5. In addition, the above method is also easy to cause problems such as excess acid, which is easy to cause environmental pollution

Images