Loss of mud is one of the most challenging issues in drilling operations. This is frequently
referred to as lost circulation. The lost circulation can arise in naturally fractured formations …

One of the most challenging issues during drilling operations is lost circulation, which can
cause several problems that could lead to increasing the non-productive time (NPT) and …

Lost circulation will inevitably increase non-productive time (NPT) and well cost. The
application of high-efficiency lost circulation materials (LCMs) plays an indispensable role in …

Cross-linked polymer gel has been broadly used to plug severe lost circulation and to
improve the strength of the near-wellbore in natural fracture or carbonate cave strata …

For years, drilling engineers have been faced with the challenge of drilling wells through
naturally fractured reservoirs that are present around the world. During drilling, the pressure …

In order to mitigate the loss circulation of oil-based drilling fluids (OBDFs), an oil-absorbent
polymer (OAP) composed by methylmethacrylate (MMA), butyl acrylate (BA), and hexadecyl …

Lost circulation is a common problem during drilling and completion, and it contributes much
to the nonproductive time of the operation. The Brazilian pre-salt is composed of highly …

Considerable lost circulation of oil-based drilling fluid often occurs because of pores and
fractures that develop in formations, which can significantly increase drilling costs. In this …

Lost circulation is a complicated problem to be predicted with conventional statistical tools.
As the drilling environment is getting more complicated nowadays, more advanced …

Nanoparticles have been widely investigated for their mechanisms in enhanced oil recovery,
such as rock wettability alternation, oil displacement by disjoining pressure, and the …