1、 Technical mechanism: The single well huff and puff treatment of microorganism is to introduce selective microorganism into the formation through production wells, grow and breed in the formation, degrade paraffin in crude oil; produce various biosurfactants such as fatty acid, glycolipid and lipoid, prevent crystal growth, reduce deposition of heavy components such as wax, asphalt and gum; form protective film on the surface of metal or clay mineral by microorganism, shield crystal core , prevent crystallization, produce organic solvents such as alcohol, aldehyde and acid, enhance the dissolution of heavy components, and improve the oil-water seepage channel. It is one of the effective means to solve the problem of low production and low efficiency in the process of production of thin oil, heavy oil or high gum asphaltene oil reservoir.   2、 Core agents: The single well microbial huff and puff agent is a yellow to brown liquid, which can be mutually soluble with water in any proportion, with a pH of 7.0-9.0. The main component is composed of microorganisms and the bioactive substances produced by their metabolism, such as biosurfactants, enzymes, organic acids, emulsifiers and other components.   3、 Technical advantages: The operation of dispensing is simple and convenient. No new equipment needs to be added on site. Green environmental protection and meet HSE requirements. People and animals are non-toxic and environmentally sound. No flammability and explosion.

1、 Technical mechanism: Based on the research and development of oil recovery functional microorganisms, through the combination of internal and external microorganisms, the microbial ecosystem in the reservoir is regulated, and the propagation and metabolites of microorganisms are utilized to realize the directional regulation of microbial community structure and the deep profile control of the reservoir. At the same time, the oil displacement mechanism of microorganisms is used to improve the oil displacement efficiency, reduce the water cut, increase the liquid production and finally improve the oil recovery Recovery rate of Plateau oil.   2、 Success stories: In many domestic oilfields, field tests have been carried out in different geological conditions, including low permeability, high temperature, high water cut and high salinity blocks, which have solved the formation problems to varying degrees and enhanced oil recovery by more than 5%. This technology can be used as an effective production technology to enhance oil recovery after waterflooding or polymer flooding, with simple construction, low investment cost and good economic benefits.   3、 Technical advantages: The combination technology of internal drive and external drive is used for field application. High throughput sequencing and microarray were used as tools to screen the strains and construct the bacterial library. According to the characteristics of different blocks, different functional strains and activator systems are selected, different slugs are designed, and microbial oil recovery technology suitable for specific blocks is formed. Green environmental protection, no damage to the formation, simple injection process, no special treatment of the produced fluid.

1、 Technical mechanism: By reducing the interfacial tension of oil and water, changing the wettability, the contact angle becomes larger, the adhesion work is reduced, the oil is easily pulled away from the rock, and the oil recovery is enhanced; It is the activator that can reduce the capillary resistance of oil-bearing reservoir and make the active water enter the original capillary, so as to improve the sweep efficiency and oil recovery; It is the oil drop washed from the rock that is emulsified into O / W emulsion by the active agent. The emulsion produces the superimposed liquid resistance effect through the capillary, increases the resistance of the high-permeability section, injects water into the low-permeability section, and improves the sweep efficiency.   2、 Technical features: The surfactant flooding technology with biosurfactant as the main body. High efficiency, environmental protection, continuous stability, effective reduction of water injection pressure. Low cost, good effect, in line with the "cost reduction and efficiency". It has good solubility, can be prepared by using the existing equipment in the oil field, and has simple on-site construction.   3、 Technology application: