2.- INTERMEDIO 1
This blog has exclusively academic content as an Ad Honorem contribution to the research center of the Faculty of Petroleum and Natural Gas, Drilling chapter of the National University of Engineering. I am a Petroleum Engineer graduated from the National University of Engineering of Peru. I work in an oil and gas company as Sr. Drilling Engineer with more than 14 years of experience and working in different countries as a Argentina, Angola, Colombia, Venezuela and Perú.
Some professional challenges:
1.-Drilling Extended Reach wells in Camisea Project, Block 88 and 56. Well type "J" Cat.5 with Offshore in Land operations in Ucayali Basin going Through Vivian, Nia, Noi and Copacabana Formations. 2. Drilling Unconventional wells HP-HT in la Calera Project. Horizontal wells Cat.5 in Neuquén Basin going through Quintuco, Vaca Muerta, Tordillo formations. 3. Drilling Wildcats Exploration Wells in Ene Basin. Vertical wells, Cat.5 going Through Chonta, Raya, Cushabatay, Ambo formations. 4. Drilling Tight gas wells in Centenario Field. Wells type "S". Cat.3 in Neuquén Basin. Quintuco, Molles and Lajas formations. 5.Drilling Exploratory well in Angola. Vertical Wells Cat.4 in Congo Basin going through Pinda, Loeme ( evaporite), Lucula, Bucomazi, Mayombe Formations. 6. Drilling wells campaigns in the Jungle, Yanayacu, Corrientes, Jibarito and Capahuari Sur Fields. Wells type horizontal Cat.3 with offshore in Land in Marañon Basin going through Pebas, Chambira, Yahuarango, Vivian, Chonta, Agua Caliente, Raya, cushabatay formations. 7. Drilling Reentry wells campaign in the jungle in Corrientes, Capahuari Sur and Pavayacu Fields in Marañon Basin. Wells Cat3. Going through Lower Red Beds, Cachiyacu, Vivian formations. 8. Drilling training in Talara Basin. Vertical Wells Cat2. Marginal field going through Verdum, Pariñas Sup, Mogollon, Basal Salinas formations. 9. Training in Production in the jungle as design engineer in electric sumergible pump , gas lift and then as a Battery operator in Corrientes, Pavayacu and Saramuro, trainning in CCTQ, some challenges with heavy oil production ( 15 API) water drive reservoirs. 10. Start-up Family Business about Energy ABV Ingenieros Consultores SAC, about rural Electrification projects. Co-Founder ( Not related to the hydrocarbon sector).
Wednesday, July 24, 2019
15.- GEOMECHANIC
2.- INTERMEDIO 1
16.- DIRECTIONAL
When drilling a well there is a risk of serious damage caused by drillstring vibrations. Shock and vibration are identified as a cause of premature failure on drill bit and components in the bottom hole assembly (BHA), resulting in lost time for operators and costing service companies several millions in repair each year. The expenditures incurred by drillstring vibrations include reduced rate of penetration (ROP), tripping and poor drilling performance. Currently, several tools and techniques are used in the attempt to minimize shock and vibration. For vibration mitigation to be more effective in the future, the most effective tools and techniques must be designated, implemented and improved.
Predicting
bottom hole assembly (BHA) vibrations is a complicated problem. Axial, lateral,
and torsional vibrations can be coupled and effects such as stick-slip and
whirl can magnify the loads. Fatigue, pipe bouncing, and tool joint washouts
demon e the complexity of the problem. One type of vibration that can be
isolated and analyzed is the rapid destruction of the BHA caused by operating
at or close to resonance. At rotating speeds that reinforce the natural
vibration of the BHA, the destructive harmonics generate high stresses resulting
in very short fatigue life. While other factors may cause BHA failure, a
significant percentage of field failures appear to be associated with harmonic
vibration, particularly lateral vibration. A simplified model based on harmonic
analysis using finite elements has been found to agree well with field
experience. The influence of stabilizer placement, drill string forces, and
mass of the drilling mud are included in the finite element vibration model. (SPE-16675-MS)
AXIAL VIBRATION : Can cause
bit bounce , which may damage bit cutter and bearing.
TORSIONAL VIBRATION : Can cause irregular down - hole rotation. Stick/Slip is often seen while drilling and is a severe form of drillstring torsional oscillation in which the bit becomes stationary for a period. Torsional fluctuations fatigue Drill collars connections and can damage bits. The use of the mud motor may help to address if the main source of excitation is from the bit but the presences of a motor does not prevent stick/slip . The drillstring and BHA above the motor can enter into a stick/Slip motion even when the motor is turning the bit a steady rate.
Figure5
shows diagram for each of the three BHA configurations. Note that there are two
stabilizers configured in BHA-2. The stabilizer is located at the far left to
the bit in BHA-3 compare with BHA-2. There is one stabilizer used in BHA-1 near
the bit. The detail descriptions are as following:
Figure6 provides state vectors display comparison for three of BHA surrogates operation at 100RPM and 80000N of bit weight. The lateral vibration potential simulation for BHA-1 is significantly lower than BHA 2 and BHA-3. Especially for the lateral displacement, the effect is most remarkably, which means that the contacts for BHA-1 with wellbore may be less than other BHA surrogates during drilling process. However, the yellow color curve shows the larger amplitudes of the states for BHA-2 than others, which represents the most severe vibration potential.
Update:24.07.19