RE: New and exclusive18 Nov 2022 21:15
OK let me help you then. The company is aware of the problem of loss of circulation material into fractures and seems to have adopted the following method to deal with it (courtesy of petrowiki.spe.org):
“ Use of loss of circulation materials
Rock mechanics and hydraulic-fracture theory indicate that it is easier to prevent fracture propagation than it is to plug the fracture later to prevent fluid from re-entering.[1] Because of the high cost of most weighted, treated drilling-fluid systems, LCM routinely is carried in the active system on many operations in which probable lost-circulation zones exist, such as:
“Rubble” zones beneath salt or in a known depleted zone
Natural and induced fractures
Formations with high permeability and/or high porosity
Vugular formations (e.g., limestone and chalk)
Using an LCM that can be carried in the drilling fluid without significantly affecting its rheology or fluid-loss characteristics facilitates the preventive pretreatment. Pretreatment can mitigate wellbore breathing (ballooning), seepage losses, and/or potential lost circulation when drilling depleted zones.
When a loss zone is encountered, the top priority is keeping the hole full so the hydrostatic pressure does not fall below formation pressure and allow a kick to occur. The hydrostatic pressure may be purposely reduced to stop the loss, as long as sufficient density is maintained to prevent well-control problems. Loss zones also pose a high risk of differential sticking. Rotating and reciprocating the drillstring helps reduce this risk while an LCM treatment is prepared. If the location of the loss zone is known, it might be advisable to pull the drillstring to a location above the affected area.
A variety of LCM is available, and combining several types and particle sizes for treatment purposes is common practice. Conventional—and relatively inexpensive—materials include:
Sized calcium carbonate
Paper
Cottonseed hulls
Nutshells
Mica
Cellophane
Because lost circulation always has been one of the most costly issues facing the industry, a focus on healing the loss zone quickly and safely encouraged the development of proprietary materials that conform to the fracture to seal off pores, regardless of changes in annular pressure. In some cases, such deformable, expanding LCM is pumped ahead of cement jobs in which losses are expected. This type of material has a comparatively high success rate for the prevention and remediation of severe losses.”
This seems to be consistent with the recent RNS and now that a pump has been doing its stuff since last Sunday we should not have too long to wait for news.