Breakthrough in Tripping And Running Completion System Technique During Underbalanced Drilling Operation Changes the Horizon in West Java Field Future Development

2018 ◽  
Author(s):  
Andri M. Hidayat
Keyword(s):  
Future Development ◽  
West Java ◽  
Drilling Operation ◽  
Underbalanced Drilling ◽  
System Technique

Development and Application of Electronic Chart System in Ocean Navigation

2014 ◽  
Vol 875-877 ◽  
pp. 1972-1975
Author(s):  
Qing Liu ◽  
Yuan Liang Zhang
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Future Development ◽  
Rapid Development ◽  
Development Trend ◽  
Geographic Information ◽  
System Technique ◽  
Geographic Information System Technique ◽  
Electronic Chart ◽  
Ocean Environment

With rapid development of the geographic information system technique, the electronic chart has come into being and is more and more mature. The electronic chart can provide the accurate and detailed information about the ocean environment, including the depth of water, situation of the seabed, distance from the shore, position, orientation and velocity of the ship, and other useful information. This paper first gives some introduction about the electronic chart. After analyzing the characteristics of the electronic chart, the application of the electronic chart in ocean navigation is provided. Finally the existing problem of the electronic chart and its future development trend are also discussed.

Modeling the Pressure Transverse for Foam Drilling Operation in Vertical Well

2021 ◽  
Author(s):  
Adesina Fadairo ◽  
Gbadegesin Adeyemi ◽  
Kegang Ling ◽  
Vamegh Rasouli ◽  
Adedayo Iroko ◽  
...  
Keyword(s):  
Drill Pipe ◽  
Flow Region ◽  
Percentage Error ◽  
Drilling Operation ◽  
Underbalanced Drilling ◽  
Proposed Model ◽  
Hydraulic Design ◽  
Foam Drilling ◽  
Function Time

Abstract Pressure transverse in foam drilling operation is sensitive and difficult to predict particular at the start of flow that follows the unavoidable shut in due to inevitable procedure of stop and proceed arising from re-connection of additional drilling pipe to further drill depth. The practice in drilling may not enable the flow to attain steadiness flow region before running in the length of drill pipe. Most existing models in the literature for predicting pressure transverse in foam drilling operation only captured the steadiness flow region of the foam drilling operation by keeping out restriction terms induced by accumulation and kinetic for simplicity sake, hence unsteadiness flow region experienced during foam drilling operation was rarely modelled. It is highly expedient to derive a model that evident the unsteadiness region in order to accurately predict pressure transverse, hence sufficiently analyses the well stability during foam drilling operation. In this study, a model for forecasting pressure transverse in foam drilling operation was established considering restriction term caused by accumulation and kinetic that constitute for accurate formulation of hydraulic model that govern flow of foam during underbalanced drilling. By applying the proposed model to a case study reported in literature, pressure transverse at unsteadiness flow region for foam drilling operation can be quantitatively estimated and analyzed. The result obtained in a case study carried out indicates high variance in pressure as function time at the beginning of flow in foam drilling where unsteadiness is promoted before matching up closely with the results obtained from the existing Guo et al 2003 model at the steadiness flow region. The new model has a better accuracy with a percentage error of 0.74% and 6.4% as compared to previous models by Guo et al 2003. The proposed model make possible for drilling engineer to take decision with larger precision during hydraulic design of foam drilling operation and guaranteeing well stability in complex drilling system.

scholarly journals Simulation of Wellbore Stability during Underbalanced Drilling Operation

2017 ◽  
Vol 2017 ◽  
pp. 1-12
Author(s):  
Reda Abdel Azim
Keyword(s):  
Finite Element ◽  
Shear Strength ◽  
Finite Element Modelling ◽  
Wellbore Stability ◽  
Time Dependent ◽  
Shear Stresses ◽  
Element Modelling ◽  
Drilling Operation ◽  
Underbalanced Drilling ◽  
Anisotropic Rocks

The wellbore stability analysis during underbalance drilling operation leads to avoiding risky problems. These problems include (1) rock failure due to stresses changes (concentration) as a result of losing the original support of removed rocks and (2) wellbore collapse due to lack of support of hydrostatic fluid column. Therefore, this paper presents an approach to simulate the wellbore stability by incorporating finite element modelling and thermoporoelastic environment to predict the instability conditions. Analytical solutions for stress distribution for isotropic and anisotropic rocks are presented to validate the presented model. Moreover, distribution of time dependent shear stresses around the wellbore is presented to be compared with rock shear strength to select appropriate weight of mud for safe underbalance drilling.

Modeling of an Underbalanced-Drilling Operation Using Supercritical Carbon Dioxide

2009 ◽  
Vol 24 (04) ◽  
pp. 599-610 ◽  
Author(s):  
Faisal A. Al-Adwani ◽  
Julius Langlinais ◽  
Richard G. Hughes
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Drilling Operation ◽  
Underbalanced Drilling ◽  
Supercritical Carbon

Continuous Circulation while Drilling: A New Approach to Maintain Hole Cleaning and Improve Drilling Performance in Swamp Drilling Operation

2021 ◽  
Author(s):  
B. K. Yuda
Keyword(s):  
Future Development ◽  
New Technology ◽  
Drill Pipe ◽  
Good Condition ◽  
Circulation System ◽  
Drilling Fluids ◽  
Hole Cleaning ◽  
Drilling Operation ◽  
Drilling Performance ◽  
Safety Incident

Swamp drilling operation in Mahakam has entered the industrialization period in which fast drilling is a common practice. However, fast drilling Rate of Penetration (ROP) causes hole cleaning issues to arise and induce a high Equivalent Circulating Density (ECD) trend. In some wells, this potentially leads to loss problems because of weak formation in shallow sections or depleted formation with relatively low fracture gradient. As a result, drilling parameter reduction was performed that causing lower ROP and additional circulation to reduce ECD. A new technology called Continuous Circulation Device (CCD) can help to tackle the problems mentioned above. It is a sub-based constant circulation system that enables the continuous circulation of drilling fluids downhole while making or breaking drill pipe connections. This system helps to maintain ECD and improve drilling performance as the cuttings are continuously carried out of the hole. This paper is introduced to analyze the benefits of CCD and opportunities for future development in the swamp drilling operation. The device was applied during drilling in the 12-1/4” and 8-1/2” sections. The challenge during drilling in these sections was to improve ROP without inducing bad hole cleaning that could lead to a high ECD trend. The result of CCD utilization shows that ECD during drilling could be reduced up to 2 points and become more stable compared to the previous trend. Since there was a reduction of ECD, the ROP could be improved up to 10%. Furthermore, only 1 cycle for circulation at well TD was performed as the minimum cuttings appeared. Pulling out the string and running the casing string was managed smoothly as the hole was already in a good condition. This utilization has been successfully implemented without any safety incident nor related Non-Productive Time (NPT). This positive result leads us to open the opportunity for future development in swamp fields asset.

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