Non-fluorescent anti-collapse fluid loss agent for drilling fluid and production process

Abstract

The invention discloses a non-fluorescent anti-slump fluid loss agent for drilling fluid, which comprises the following components in parts by weight: 100 parts of natural asphalt; 40-60 parts of white oil; 40-60 parts of diesel oil; NP-9 alkyl 1~3 parts of phenol polyoxyethylene (9) ether; 1~3 parts of dodecylbenzenesulfonic acid; 50~70 parts of sulfonated phenolic resin; 10~30 parts of polyacrylamide, 1 part of ultraviolet absorber. The anti-slump and fluid loss reducing agent prepared by the invention is applied in drilling fluid, and has the characteristics of high temperature resistance, high oil solubility, and good plugging and fluid loss reducing effects.

Description

technical field [0001] The invention relates to an anti-slump agent for drilling fluid and a production process of the anti-slump agent. Background technique [0002] Wellbore instability during drilling has always been the main factor affecting the smooth progress of drilling, especially in the case of increasing number of deep wells, ultra-deep wells, directional wells and highly deviated wells, the above problems are more prominent. During the drilling construction process, People often add anti-slump agent and fluid loss reducer to solve the above problems. At present, the commonly used anti-slumping agents include polyols, natural asphalt and inorganic salts. Among them, the cost of anti-slumping agents of polyols is relatively high, and some products have a great impact on the performance of drilling fluids, causing foaming; inorganic salts The cost of anti-slumping agent is low, but it increases the annual and filtration loss of drilling fluid, which seriously affect...

AI Technical Summary

Problems solved by technology

At present, the commonly used anti-slumping agents include polyols, natural asphalt and inorganic salts. Among them, the cost of anti-slumping agents of polyols is relatively high, and some products have a great impact on the performance of drilling fluids, causing foaming; inorganic salts The cost of anti-slumping agent is low, but it increases the annual and filtration loss of drilling fluid, which seriously affects the performance of drilling fluid; natural asphalt anti-slumping agent has better plugging performance, but it has fluorescence, so it is not suitable for exploration wells and pre-exploration wells used in

FT-342, a representative of natural asphalt anti-slump agent, consists of vegetable oil, mineral oil, natural asphalt sulfonate, coating inhibitor and surfactant; this anti-slump agent not only has fluorescence, but also has relatively high temperature resistance. Low, usually only 150°C~180°C, and the anti-slump performance and filter reduction effect are not outstanding, and the compatibility with other drilling fluids is poor, which is easy to cause pollution to the environment