Brief description of technical capabilities and service scope:
Microbial reinforced oil flooding is a technology that allows functional microbial bacterial species with strong environmental adaptability screened from the oil layer to amplify the microbial fermentation broth on the ground to dilute it with the nutritional system to a certain concentration, and inject it into the target oil layer from the wellhead of the injection well with water flooding. The driving force of injected water is transported to the production well, thereby achieving the purpose of increasing single well production capacity and improving recovery.

Technical advantages & main indicators:

Input-output ratio: 1:3~1:4

Well washing cycle: extend the well washing cycle for at least 30 days, effectively reducing the problem of shutdown caused by well washing

Adaptive environment: Stratigraphic temperature: 30℃~93℃, total mineralization degree: 104627–256752mg/L Rock layer permeability: 5–50×10-3µm2

Efficiency period for increasing production: average of more than 1 year

Oil displacement rate: Increased by more than 21.6%

Oil increase: Daily oil output increased from 0.5t/d to 1.44t/d, with a maximum of 4t/d

A cumulative single-year oil output increased by one well: more than 500m³ Maximum increase by 1400m³

Brief description of technical capabilities and service scope:
Microbial clearing and wax prevention technology uses microorganisms to degrade components such as paraffin in crude oil, and the products of microbial metabolism can form emulsifiers and other surfactants, assisting the nano-scale bubbles generated by microbial metabolism to change the flow performance of crude oil and improve the production capacity of oil wells. It has a long validity period and simple process, and does not require other equipment support. It avoids pollution and damage to the oil layer caused by hot washing of the oil well and meets the quality standards of green and environmentally friendly construction.

Input-output ratio: 1:7

Well washing cycle: extends the well washing cycle for at least 47 days, effectively reducing the problem of shutdown caused by well washing

Wax dissolution rate: >93%

Effective efficiency: 100%

Adaptive environment: Stratigraphic temperature: 30℃~93℃, total mineralization degree: 104627–256752mg/L Rock layer permeability: 5–50×10-3µm2

The effective period for increasing production: average is about 6 months

Brief description of technical capabilities and service scope:
Use the composite transformation technology of liquid carrying solid unblocking particles + temporary impedance and steering + permeability reduction; solid particle transformation liquid: solid unblocking particles → dissolve formation blockages and cements, etch formations, improve seams, and provide higher flow diversion capabilities. Infiltration and viscosity reduction → Add supporting permeability and viscosity reduction agents to the system to improve the flow state of crude oil, replace the crude oil in the micropore channels, and increase the yield rate of difficult-to-use reserves.
Temporarily block the steering → Temporarily block the high-permeability flow channel, open the lower-permeability flow channel, step steering, and establish a full-dimensional crack system and channel communication for the full-perforation stage formation.

Temporary plugging steering material properties:

Applicable temperature: 25-200℃

Shape specifications: 4-8mm fiber/1-5mm irregular particles/5-13mm block particles/6-26mm balls

Appearance: white fibrous, light yellow granular, spherical

Material type: Water-based temperature-controlled degradation type to avoid the disadvantage of oil-soluble materials not degrading without oil.

Applicable temperature: 25-200℃

Compressive strength: temporary ball blocking≧40Mpa

1. Technology introduction
The one-step acid online acidification process technology is an online acidification process technology that only uses a single low-corrosion acid solution to allow the water injection well to acidify and resolve blockage and reduce pressure while continuously injecting water. One-step acid is mixed into the wellbore through the water injection pipeline. After reaching the formation, acid is used to resolve the blockage and reduce the water injection pressure and improve the water injection oil discharging efficiency. Residual acid does not need to be discharged. It is operated in a continuous water injection. The operation is simple/safe, low operating cost, and no water injection is required. The well is stopped and the acidification operation can be widely used for water injection development well networks and water injection single well deblocking and increasing injection operations.

2. Technical characteristics
● Only one acid liquid system is used, no need for liquid dispensing/mixing, etc., no complex systems such as pre-acid, main acid, substitution liquid, and treatment liquid are used;
● The acid reaction rate is slow, and the degree of dissolution of rock particles is lower than that of soil acid, but the inhibition rate of CaF2 and MgF2 reaches more than 70%; the corrosion rate of online acid on steel sheets at 90℃ is ● Suitable for the base temperature between 60 and 140℃, the water injection in acid oil field has good compatibility.

3. Supporting technical achievements
● Select wells and layer selection, conduct acidification design of water injection wells, determine the acid liquid quantity/water injection ratio, total acid liquid quantity, injection displacement, pump injection displacement, etc.;
● Test evaluation and analysis of acid solution selection, acid solution blockage, on-site acidification materials and equipment preparation, on-site construction and technical services;
● Online monitoring of acid liquid and analysis of water injection well effect.

4. Application effect
Before acidification of the water injection well, the filling required water injection oil pressure is 30.9MPa, and the initial daily injection is 15m3, and the daily injection volume is 1m3/d, which does not meet the filling requirements; after the online acidification process is used to acidify and resolve the blockage, the water injection oil pressure is 21.4MPa, the water injection pressure drops by 9.5MPa, the daily injection volume reaches 20m3/d, and the increase in injection is 19m3/d, meeting the filling requirements.