Biological plugging releasing oil displacement detergent and production method thereof

Abstract

The invention relates to a biological plugging, oil and scale removal agent by taking advantage of micro bio-fermentation method and a preparation method thereof. The invention is extruded into stratum so as to lower surface tension of reservoir rock, lead the hydrocarbon of rock surface to peel off and spread away and can increase oil phase penetrance rate and reduce oil increment and realize the purpose of oil removal and improving recovery efficiency.

Description

technical field [0001] The invention relates to a production method and application of a biological plug-removing oil displacement and scale remover, belonging to the field of oil exploitation industry. technical background [0002] During the production process of drilling, well completion, well workover, well killing, well washing, sand flushing, acidizing, subfracturing and oil recovery, oilfields often cause various oilfield damages, such as emulsification plugging, water lock, suspended particle plugging , paraffin, colloid, asphaltene and other deposits, scale, etc., especially the composite plugging of inorganic scale and organic matter such as crude oil and wax, and the reversal of wettability of oil layer rocks have seriously affected oilfield production. [0003] At present, the plugging removal and oil displacement methods commonly used in oilfields include: ①Acidification (basically using strong acid such as dilute hydrochloric acid)—acidification has an obvious ...

AI Technical Summary

Problems solved by technology

[0003] At present, the plugging removal and oil displacement methods commonly used in oilfields include: ①Acidification (basically using strong acid such as dilute hydrochloric acid)—acidification has an obvious effect on inorganic scaling blockage removal, but it does great damage to reservoirs, oil layers, groundwater, and oil production equipment; ②Fracking——Fracking is a necessary measure to artificially create fractures in tight reservoirs, change seepage, and increase production, but it changes the reservoir structure and pressure balance; ③Hot water injection (steam)——Water injection development It is necessary for the secondary development of oilfields and the development of heavy oil. At present, circulating water is used, but this method is also the biggest problem of oilfield water resources and power consumption; , currently in the experimental application stage, the effect is slower than other methods

[0004] In general: chemical flooding, such as polymer flooding, factors such as salinity and shear affect its viscosity, block the oil layer, make it difficult to treat the produced fluid, and high operating costs; chemical plugging will seriously damage the formation and damage the oil The casing corrodes, causing secondary pollution; the physical plugging removal process is complex and costly; microbial flooding and plugging removal are slow and long-term, and are greatly affected by formation pressure, temperature, and pH, and will produce new derivatives clogged oil reservoir etc.