Research of the Lost Circulation Curing

wells, as well as the use of an economically profitable and effective
method of lost circulation curing, is an urgent problem. In order to
opt for the optimal method for lost circulation curing, it is necessary
to investigate the causes of losses and methods of studying the
absorbing formation, analyze the experience of lost circulation
control in the regions, and take up an economically profitable and
effective method of lost circulation curing. The work identifies the
factors impacting the occurrence of the drilling mud losses.
Geophysical research methods are considered to study thief
formations. The peculiarities of the considered methods and their
economic analysis are given. The identified Selection Method for the
measures to prevent and control fluid loss is based on quantitative
criteria allowing for the geological structure and hydrodynamic
characteristics of formations. The lost circulation curing based on
placing cement plugs, the QUICK-STONE™ technology, the lost
circulation curing based on insulating compound chromium acetate
are considered. The economic analysis of the considered methods is
given. It has been found that the use of an insulating compound based
on chromium acetate is 3.2 times more economical than QUICKSTONE™ technology, as well as 1.4 times more than placing the
cement plug.