The Study of Induced Action and Its Action Me chanism to the Delayed Gelling of Complex Profile Control Agent
Wei Xiao · Chemical Researches · 2001
This paper introduces the basic concept of induced ac tion and judgement pattern of its existence. The complex profile control agent is composed of hydropolyacrylamide (HPAM), lignosulphonate (LSS), sodium bichro mate, thiourea, etc. It possesses the features of adjustable gel_forming time (5～30 hours) and higher gel strength [(10～40)×104 mPa·s]. And it h as achieved notable economic benefit, and input output ratio is 1∶6.33. Room co ntrast evaluation experiments show that neither taking sodium bichromate/lignosu lphonate nor sodium bichromate/thiourea as crosslinker can satisfy the needs of gel_forming properties of profile control agent, because crosslinking too quickl y or too slowly and lower gel strength are present in profile control agent. On the contrary, taking sodium bichromate/lignosulphonate/thiourea as complex cross linker, profile control agent can meet the needs of properties, because it posse sses the features of adjustable gel_forming time and higher gel strength, etc. U pon experimental judgement pattern and mechanism judgement pattern, it proves th at the induced action is the key to delayed crosslinked action in the complex profile control agent.