Risk Analysis Application for Drilling Operations

2004 ◽  
Author(s):  
J.C. Cunha
Keyword(s):  
Risk Analysis ◽  
Drilling Operations ◽  
Analysis Application

scholarly journals Risk Analysis of DP Incidents During Drilling Operations

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Zaloa Sanchez-Varela ◽  
David Boullosa-Falces ◽  
Juan Luis Larrabe-Barrena ◽  
Miguel Angel Gomez-Solaeche
Keyword(s):  
Risk Analysis ◽  
Significant Risk ◽  
Dynamic Positioning ◽  
Traditional Classification ◽  
Drilling Operations ◽  
Type Of Failure ◽  
Financial Losses

This paper aims to present a method to determine the type of dynamic positioning (DP) incidents that have a more significant risk during drilling operations in the period 2007-2015, according to the element or the type of failure that causes the DP system to fail. Two different classifications are made: 1) according to the element that produces the incident (which has been the traditional classification in the industry) and 2) according to the type of error that arises, the latter being an alternative classification proposed in this paper. The predictable financial losses for each level of severity are used to define the resulting consequences for each case. A risk analysis is performed with the data obtained, showing the potentially more dangerous incidents, either because of their higher number of occurrences or because their consequences are remarkable. According to the classification proposed, the main causes with the higher risk results were power and environmental, according to the traditional classification, and fault/failure. Thus, the power segment’s combination of failures is the riskiest cause during the DP drilling operations.

Valuable Cuttings-Based Petrophysic Analysis Successfully Reduces Drilling Risk in HPHT Formations

2021 ◽  
Author(s):  
Jianlin Chen ◽  
Yanhua Yao ◽  
Yingbiao Liu ◽  
Zhaofei Wang ◽  
Craig Collier ◽  
...  
Keyword(s):  
Real Time ◽  
Fluid Loss ◽  
Bottom Line ◽  
Rock Density ◽  
Drilling Parameters ◽  
Drilling Operations ◽  
Analysis Application ◽  
Time Basis ◽  
Compressional Strength ◽  
Drilling Conditions

Abstract Cuttings data has always been neglected or forgotten as a source of information by many operators. In some areas, it is even common practice to throw away cuttings in order to reduce cost. However, cuttings data can yield a great amout of information to provide great value and support to drilling operations, as well as reduce potential downhole risks. This was evident in wells drilled in remote Western regions of China, where wells typically have high temperature high pressure (HTHP) formations with a true vertical depth ranging between 4000-7000 meters and target formation temperature between 150-160 degrees Celcius. Due to severe drilling conditions, the measurement tools of Logging While Drilling (LWD) and Measured While Drilling (MWD) are at high risk of running into holes. Even due to the high formations’ temperatures is over the bottom line of LWD and MWD tools, the sensors of LWD and MWD cannot work efficiently in such circumstances, increasing the drilling risk and expense. Thus, "blind" drilling is the most reasonable economical choice for local operators. Without sufficient real-time formations’ information, the drilling uncertainties dramatically increase. The fluid loss, pipe stuck, as well as drilling bit damages frequently occur. Currently, there is no successful well that accesses to the target reservoir. The data from the wireline logs and cores cannot be available, as the well is the first exploration well in the block; however, during drilling, only drill cuttings are available for peoples. The creative cutting-based petrophysics models are built for the formation analysis that is able to provide rock density, cuttings gamma, Delta Time of Compressional Acoustic (DTC), Unconfined Compressional Strength (UCS) Index, Caliper Index, Brittleness Index, and Hydrocarbon Index from the cuttings samples at the wellsite on a near-real-time basis. This data can help people quantitatively and qualitatively evaluate the downhole formations on a near-real-time basis and can help people to make a more reasonable decision, and therefore, reduce the drilling risk within a controlled level. The authors provide the several cases to study the cutting models into drilling events, and proves the models are consistent with log and core data, and match the drilling parameters and like ROP, and pumping pressure, as well as torque, and bit performance. LWD and MWD are unable to run into the hole due to high formation pressure and extreme risky hole. The field portable XRF instrument is applied, and the mineralogy and elements input into the models. The cuttings petrophysics analysis application can provide the valuable information for drilling engineers to drill the wells to TD.

Resilience engineering for socio-technical risk analysis: Application in neuro-surgery

2018 ◽  
Vol 180 ◽  
pp. 321-335 ◽  
Author(s):  
Riccardo Patriarca ◽  
Andrea Falegnami ◽  
Francesco Costantino ◽  
Federico Bilotta
Keyword(s):  
Risk Analysis ◽  
Resilience Engineering ◽  
Technical Risk ◽  
Analysis Application

A New Method for Well-Specific-Risk Analysis in Drilling Operations

1998 ◽  
Author(s):  
Lasse Berg Andersen ◽  
Gunnar Veire ◽  
Borgar Rokke
Keyword(s):  
Risk Analysis ◽  
New Method ◽  
Specific Risk ◽  
Drilling Operations

scholarly journals Dynamic simulation for risk analysis: Application to an exothermic reaction

2018 ◽  
Vol 113 ◽  
pp. 149-163 ◽  
Author(s):  
Fatine Berdouzi ◽  
Claire Villemur ◽  
Nelly Olivier-Maget ◽  
Nadine Gabas
Keyword(s):  
Risk Analysis ◽  
Dynamic Simulation ◽  
Exothermic Reaction ◽  
Analysis Application
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