مشروع البحث: Drilling optimizattion Techniques and Improves Drilling Efficiencies in Hard -Abrasive and Salt Formation , SE sirt basin ,Libya
تحميل...
المساهمين
الممولين
رقم التعريف
7058
الباحث
مهند الصادق غنية
الوصف
As the industrialization of the world is growing, both energy consumption
and demand are steadily increasing. Hydrocarbons have been an important
energy provider for several decades, but the production from oil and gas producers
is now declining. In order to meet this rise in energy demand, new hydrocarbon
deposits must be found and produced. When drilling towards these oil and gas
reservoirs, the first problems may occur already in the formations above the salt
structures and salt beds. The density of salt does not increase with burial depth. When
its density becomes lower than of the surrounding formations, salt will start to migrate
and push through the overlying rocks. Due to the combined effect of compaction
disequilibrium and salt tectonics, complex stress patterns can be created in the
formations surrounding the salt structures. This may lead to many hazardous scenarios,
created by rubble zones and recumbent beds. When drilling inside salt formations, it is
salt’s ability to creep and flow that may cause problems. Salt flow may cause borehole
deformation.
Because large oil and gas reservoirs are associated with salt and hard
formations, this may be an important energy source for the future. Therefor, optimisze
drilling parameters, increse drilling efficiency, reduce non productive time (NPT) and
reduce cost is important and will increase drilling and consequntly the hydrocarbon
production.
Drilling data from offset wells from Sirte Basin in SE Libya were analyzed and
simulated in order to optimize drilling parameters. The results were compared with
actual wells drilling data. The parameters used in the data analysis include weight on
bit (WOB), rotation per minute (RPM), borehole assembly design BHA), hydraulic.
This project went through challanges associted with drilling salt formation and
optimimum drilling parameters that are used to overcome these challenges. Drilling
bit technology has great impact on drilling efficency, and in this study the drill bits type
and their applications are discussed in order to select suitable drilling bit for different
rock types. , selecting a proper bit is important to increase drilling efficiency and
minimize drilling time.
As part of investigating the drilling challenges in salt and hard formations, two new
drill-bit technologies have been evaluated. These bits may be beneficial in order to
overcome many of the problems related to salt drilling. Based on the results obtained
in previous studies, these bits are capable of reducing the shock and vibration levels
while drilling. This is because these bits are able to drill smoother than conventional
PDC bits. Further, the reduced shock and vibration levels will allow an increase in
WOB and rotary speed. Based on previous studies, these are the two of the most
important parameters to ROP. Thus, these two new drill-bit technologies might be able
to increase ROP when drilling in salt and hard formations.
الكلمات الدالة
Drilling optimizattion Techniques and Improves Drilling Efficiencies in Hard -Abrasive and Salt Formation , SE sirt basin ,Libya