Research And Application Of One Non-fluorescence And Environmental Water Base Drilling Fluid Lubricant

According to the lubrication of drilling fluid lubricant for reducing resistance mechanism to be recycled vegetable oil as raw material, by sulfonating agent and emulsifier as auxiliary materials synthesized drilling fluid with non fluorescence lubricant(WBL). DLA- type II drilling fluid dynamic lubrication analyzer was used to simulate the drilling fluid circulation flow in normal drilling process, and the friction resistance between the drilling fluid and the wall was simulated, and the torque reduction rate was tested. The field test the application effect of gas well drilling fluid, vegetable oil lubricant WBL in peach 2-7-3H wells horizontal wells 30 wells. Experimental test and field test results show that, after a certain chemical modification, the stability of vegetable oil can be recovered(easy to be decomposed, decomposed, or high temperature degradation, etc.) of the properties are improved. Obtain the following main results:(1) the quality of the waste vegetable oil is very poor, very poor health, peroxide value, acid, water seriously overweight, a smell of non edible oil. The purification of the industry must be preceded by the modification of the industry. The recycled vegetable oil separation, purification and modification, and developed the drilling fluid with bio oil lubricant WBL and its lubrication coefficient decrease rate reached 92.2%, foaming rate: less than or equal to 5%, the fluorescence level: less than or equal to 3, anti temperature of 150 DEG C, and with a variety of water-based drilling fluid has good compatibility.(2) through a series of indoor experiments, when the oil content of oil in the lubricant is over 50%, the lubricating coefficient is no longer significantly increased, and tends to be stable to reach 92.2%, while the lubricating coefficient of crude oil is only 47.3%, which is not up to standard. It has no fluorescence or low fluorescence level to find the reservoir more flexible, reduce the drilling mud logging error, also, for the current level of lubrication and friction reduction of the oil is also a good lubrication, and the optimal amount of lubricant is about 2%, its economy has a big advantage.(3) vegetable oil lubricant test site over 30 wells, site lubrication reduction resistance performance excellent, all in the process of drilling torque is reduced by an average rate reached 37.5%, friction is reduced by an average rate reached 49.4%, slider friction coefficient reduced the average rate was 65.8%, glide torque friction reduction effect is obvious and favorable to the drilling speed. The control of the complicated situation of the underground has obvious effect, the friction coefficient of the slider is between 0.0262 and 0.0524. The average cost of all the wells using WBL was 184.3 yuan /m~3, an average of 29.64% compared with the previous cost.(4) the recycling of waste vegetable oil, reducing the amount of waste edible oil, which is used in the society, is used in the drilling operation. More types of waste oils and fats are suggested to be used in the drilling industry.