Iranian researchers at Organization for Industrial and Scientific Research of Iran have for the first time obtained a new mud engineering formulation in drilling business
Iranian researchers at Organization for Industrial and Scientific Research of Iran have for the first time obtained a new mud engineering formulation in drilling business, the Persian service of ISNA reported on Monday.
The research was initially offered in the form of a study project by the National Iranian South Oilfields Company (NISOC) and eventually ended with a unique â€˜solid stateâ€™ mixture formulation to optimize the density of mud mixed with water and other porous materials which may even include cork. An optimal required mud mixture or fluid with the density of 45-52 pcf (psi cubic feet) was the result, offering suitable engineering features such as mechanical, chemical and temperature stabilities.
Furthermore, mud engineering plays a crucial role in controlling pressure caused by the upper layers in over-balanced drilling method. In many of the layers, the pressure is even lower than hydrostatic column (pressure) of a fluid like water, 4/62 pcf, thus mud loss and lower fracture parameter, if composed of rock layers, come to play in drilling operation, causing great financial loss to the extent that the whole operation stops i.e. collapse of well.
It is noteworthy to know that the above process necessitates many trials to achieve pcf 40. Moreover, density stability within the range naturally suggests a balance between â€˜highâ€™ pressure and temperature which is normally at 80-120 centigrade Celsius and 80 atmospheric bars. Using xanthan amphiphilic organic polymer and CMC (carboxy methyl cellulose) do not make the mud mixture made by the researchers prone to such PVT (pressure, volume, temperature) parameters thus any increase in viscosity index could easily be dealt with by adding deflocculant composites like lignite, a significant accomplishment in tedious and costly drilling business.
Source : www.mehrnews.ir