Study Of Water-based Polymer Film Drilling Fluid

The film-forming theory and controlling technology of the water-based polymer drilling fluids is a new type of drilling fluids technology and theory, which is researched comparatively much and developed quickly at home and abroad in recent years. It' s mostly design to formation damage prevention acting as non-acid soluble shielded temporary plug in completion fluids and stabilizing wellface in the form of film-forming in the drilling fluids of guarding against collapsing.At first, on the base of the semi-permeable membrane theoretical investigation of the oil-based drilling fluids and the part water-based drilling fluids at home and abroad, we researched and summed up the film-forming mechanism of the water-based polymer drilling fluids and tidied up the mussy water-based polymer drilling fluids film-forming theory, and definitely came up with film-forming condition and critical technology, which designate the direction for selecting polymer film agent. The research on the film-forming finishing agent in the water-based polymer drilling fluids and the drilling fluids dispensation possessing film-forming function was a key link of the wholly film-forming technology. We obtained a type of polymer possessing well film-forming function, and formed a suit of water-based polymer drilling fluids dispensation possessing film-forming functionin according to the film-forming theory via a lot of experimental investigations in the text. The fact on the base of the system study and evaluation of the film-forming drilling fluids Proclaim that the membrane densify and tenacity is very good, and we can effectively clean out the membrane with the action of the eliminating agent, so it have the property of shielding the reservoir. At the same time the film-forming drilling fluids possessing the property of low filter loss, innocuity and biodegradable.In the course of the research in the text, we came up with and adapt the new water-based film-forming drilling fluids experimental evaluation mechanism such as the bearing test, water permeability test, the scanning electron microscopy (SEM) test, the semi-permeability test and others. The established and application of the new experimental investigation method provided experimental method for unfolding the evaluation and research of the water based polymer drilling fluids film-forming usefulness, and pioneered the new avenue for keeping on researching.