Non-fluorescence lubricant for water-base drilling fluid

Abstract

The invention discloses a non-fluorescence lubricant for water-base drilling fluid, which relates to the technical field of lubricants for water-base drilling fluid. The lubri cant is prepared from the following raw materials in percentage by weight: 30 to 50 percent of industrial castor oil, rapeseed oil residue and industrial soybean oil, 0.6 to 1.0 percent of sodium pyrosulfite, 2 to 3 percentof nonyl phenol polyoxyethylene ether, 0.02 to 0.04 percent of antioxidant 501, 1.0 to 1.2 percent of caustic soda NaOH, and the balance of water. The lubricant has no adverse effects on geological logging, cannot cause no real cuttings to be got in the logging process, and cannot affect the discovery of new hydrocarbon reservoirs.

Description

technical field [0001] The invention relates to a lubricant for water-based drilling fluid, in particular to a non-fluorescent lubricant for water-based drilling fluid. Background technique [0002] Although a lot of research has been done on lubricants for drilling fluids at home and abroad, various solid, liquid, and nano lubricants have been developed, and a large number of application results have been achieved in drilling in different oil and gas fields. However, due to the different working environments, each lubricant is applied in different oilfields and different geological blocks, and used in different drilling fluid systems. The effects of lubrication, friction and torque reduction are very different, and the influencing factors are many and complex. Therefore, Each lubricant has its limitations and scope of use. It is very necessary for us to study the drilling fluid and completion fluid series based on the geological conditions and formation characteristics of t...

AI Technical Summary

Problems solved by technology

However, due to the different working environments, each lubricant is applied in different oilfields and different geological blocks, and used in different drilling fluid systems. The effects of lubrication, friction and torque reduction are very different, and the influencing factors are many and complex. Therefore, Each lubricant has its limitations and scope of use. It is very necessary for us to study the drilling fluid and completion fluid series based on the geological conditions and formation characteristics of the oilfield and the characteristics of the oilfield's self-contained drilling fluid and completion fluid series. The matching lubricant with its own characteristics and independent intellectual property rights meets the needs of drilling in Changqing area

[0003] Moreover, in the drilling process of exploration wells, deep wells, and horizontal wells in Changqing Oilfield, Ordos Basin, there are many kinds of lubricants currently used, which are expensive (generally above 20,000 yuan / ton) and extremely unstable in quality; especially as Changqing The development scale of horizontal wells in the region continues to expand, and the amount of drilling fluid lubricants is also increasing. However, the current lubricants cannot effectively solve the problem of drilling fluid lubrication and drag reduction in long horizontal well sections. Some lubricants have poor stability and stratification. Well meet the needs of drilling fluid lubricants in drilling engineering; moreover, some of the lubricants used have a negative impact on geological logging due to fluorescence problems, resulting in no real cuttings being caught on mud logging, which affects the unfavorable discovery of new oil and gas layers result