Technical manual of SDKX-0198 system for oil and gas wells (resistant to high temperature, high salt, high mineralization)
1. Overview of product system research and development
According to the needs of the oil field's three oil production needs, the joint research team of Shandong Kexing Chemical Co., Ltd. has faced similar problems in the middle and late stage water blocking, blocking and blocking layers after heavy oil multi-wheel steam drives in oil field compound active agent adjustment, and similar problems in foam gas drives such as carbon dioxide. A new product of SDKX-0198 for dual-liquid dissection and water blocking for oil and gas wells (hereinafter referred to as SDKX-0198) has been developed to successfully explore a supporting process system and method for micropore adjustment and drive in heterogeneous reservoirs with "inorganic compound-Titanium oxalate and composite whisker precursors" materials. The SDKX-0198 system consists of two liquid systems, referred to as the SDKX-0198-A and SDKX-0198-B system, and the product is made of two liquid packaging.
1. Introduction to the SDKX-0198 system:
in the system; SDKX-0198-A agent: a colorless transparent liquid; mainly consists of a transparent aqueous solution composed of nitrogen-containing inorganic compounds, ammonium oxalate, etc., emulsifying active agent, and deionized water as the main components;

2. SDKX-0198-B agent: It is a colorless or light milky white aqueous solution, with the main components being two inorganic ammonium salts, as well as emulsifying active agents and deionized water. Among them, the active agent accounts for only 5% of the volume in the whole.

 2. SDKX-0198 product physical and chemical indicators

3. The purpose and recommended scope of use of the SDKX-0198 system.
1. The SDKX-0198 system can be widely used in three oil production, water regulation and water regulation, micro-crack sealing during chemical drive, and three high-speed and water regulation after heavy oil multi-wheel drive can flow, and the three high-level and low-permeability oil field water regulation and water regulation. It is especially suitable for horizontal wells to block water in sections, oil and water wells and gas wells to block water and seal and conventional measures.
2. SDKX-0198 system injection process; dilute the segment plug of agent
A--
4. SDKX-0198 system working fluid configuration injection method
When designing agents A and B (at the mass ratio of the total solute content of solid content 1; 1), the conventional commodity concentration is injected in a proportion of 1:1 volume. When designing the total number of cubes according to the on-site effect, component A can be diluted with water to 1:1-1:5 as needed, and the total solute remains unchanged. The volume of agent A:B is according to the design needs and the solid content of agent A is the same, so that the volume injection amount reaches the desired layer effect requirements. Before injection, please note that agent A and agent B must be stored independently. Both are transparent liquid substances. Under normal temperature and pressure, mixing component A and component B will produce a white precipitate.
5. The mechanism of action of SDKX-0198 system;
1. The principle of water blocking action of SDKX-0198 combined system:
In micropores at a certain pressure and temperature, the reactions of the SDKX-0198-A and SDKX-0198-B systems are different from those without "seed" or "model" at normal temperature and pressure. That is, the component SDKX-0198-A is slowly injected into the micropores, and first form the "nitrogen phosphorus compound-titanium oxalate ammonium oxalate composite whisker precursor" at 40℃-270℃ and a pressure stronger than 1 atmosphere. They will further react, and use the mesh in the micropore cavity as the "model" and "seed" to gradually form a whisker-like solid overall mesh substance. Since the whisker is a single crystal, its pressure resistance is high, and the test data is greater than 20Ma.s to withstand the water injection pressure.
2. System features:
In the micropores of heterogeneous oil reservoirs, due to the differences in permeability, when component SDKX-0198A is added, it will enter the micropores with high permeability, and then use water to drive away the excess and residual component A in the channel. At this time, no solid blockage is formed in the micropores, and then component SDKX-0198-B is slowly injected. In this process, component A and component B in the micropores slowly meet to form a solid precursor, which provides sufficient time for operations such as adjusting the pressure of blocking water. With the action of pressure and formation temperature, the solid precursor is converted into barium potassium-sulfur-titanium sulfide composite whiskers, blocking the water and adjusting the precursor Naturally completed, the advantages of this method are: 1. The final water plugging agent is an inorganic whisker material, the whisker is a single crystal, and has high pressure resistance. 2. A reactant of the SDKX-0198A-SDKX-0198B system that adapts to the target micropore size naturally adjusts the particle size. The reactants of the SDKX-0198A-SDKX-0198B system are liquid, not pre-prepared solid particles, and the final fill particle size is modeled on the target pore size. It is a method to naturally adjust the particle size of the target micropore size. 3. Since the conversion from solid precursor to the final whisker plug water adjustment requires a certain temperature, pressure and time, which provides an operable time for the growth and adjustment of the whiskers.
6. SDKX-0198 Indoor Evaluation
 SDKX-0198 must be used before application. First, select the on-site water and use 1:2 or 1; 3 dilute (Agent A, low limit 1:1, upper limit 1:5) and 100ml of liquid B to conduct core test or sand filling pipe replacement pressure test. After the compatibility test meets the standards, you can enter the site.
7. Product safety
ingredients A are mainly: inorganic salts, deionized water, acid-base neutral, non-toxic and harmless, and flammable and explosive and environmentally polluting ingredients.
The ingredients of B are mainly: inorganic ammonium salts, deionized water, slightly alkaline, non-toxic and harmless, non-flammable and explosive and environmentally polluted ingredients, and even food-grade raw materials are purchased. 8. Precautions for use
A and B cannot be mixed at the same time before construction. They are materials with opposite charge properties and cannot be confused. When using, A agent can be diluted or not; B agent cannot be diluted on site, otherwise it will turn into a white liquid and cause misunderstandings. If you want to dilute and keep it transparent, you can only use equipment before leaving the factory. Users do not need to dilute the product physically. ,
9. Packaging and storage;
1. SDKX-0198 The product is an environmentally friendly product. Non-flammable products.
2. Packaging; method is; 1000kg square polyester plastic bucket; or 240kg; 200kg; 50kg; blue polyester plastic bucket;  
3. Store indoors to prevent sunlight from exploding. When the operator contacts the skin and eyes, use pure water to clean it. Or wash with detergent.