What is the business scope of acid plugging removal in oil wells and pressure reduction and injection increase in water wells?

Acidification is the main technology to solve the plugging problem of oil and water wells in oil fields. Hydrochloric acid and hydrofluoric acid in acidizing solution have different toxicity and strong corrosiveness. The properties of waste acid liquid discharged from acidizing, acid fracturing or pickling pipelines are related to the types of acid liquid, the properties of crude oil and the properties of formation fluid, which are usually characterized by high COD and high salinity. Waste acid solution is highly corrosive, and it will acidify the soil if it is discharged into the soil. The scaling of acidic solution and sulfide will produce toxic gas hydrogen sulfide. The preparation of acetic acid will produce very irritating steam, which will cause serious burns if it comes into direct contact with animals and plants. It is harmful to the environment and biology and has a certain impact, so it must be properly handled in accordance with relevant regulations. For example, the acidizing stimulation construction of offshore oil wells has limitations, and domestic and foreign oilfield downhole operations all hope to have a clean acidizing stimulation technology without backflow.

In addition, conventional acidification has the following problems:

1, the oil well is easy to produce sand after acidification;

2. Highly corrosive;

3. The residual liquid after acidification must be recovered by reverse drainage, which is a complicated process, and sometimes it will cause gathering and transportation accidents if it is not cleaned;

4. The recycling cost is high, it is not easy to operate, and incomplete treatment is easy to cause environmental problems.

Cotton bio-acid is the first international patent technology owned by Shi Sheng Petroleum Technology, which successfully solved the above-mentioned problems in offshore oil fields. After acidizing construction, the construction fluid can enter the submarine pipeline flow without affecting the gathering and transportation system, with low corrosivity, and the treated reservoir does not destroy the rock skeleton, which has obvious reservoir protection characteristics. There is no need to recycle after construction, which saves the funds of offshore oil fields, avoids the danger of chemical transportation, stacking and storage, and meets the requirements of clean production, which is a blank in domestic oil field stimulation technology. If it is used in offshore oil fields, it can save 60 thousand yuan only by recovering transportation and treatment costs, which is a major breakthrough in environmental protection and production increase technology.

As a technology to increase production and plug removal in formation without flowback, it can not only greatly increase oil well production, but also reduce acid flowback, so it is a clean production technology worth advocating. Completely solve the problem of pollutant discharge.

Shi Sheng Petroleum Science and Technology adheres to the development strategy of specialization of petroleum service science and technology, constantly innovates, serves with leading technology, design and innovative ideas, and provides oilfield with new technologies for acidizing and increasing production required by complex environment.