Industry First Subsea Reentry Multilateral Wells: Case Study

2021 ◽  
Author(s):  
Simone Ragaglia ◽  
Antonio Carotenuto ◽  
Luca Napoleone ◽  
Guerino De Dominicis ◽  
Sergey Sakharov ◽  
...  
Keyword(s):  
Multidisciplinary Team ◽  
Petroleum Industry ◽  
Wellbore Stability ◽  
Weekly Basis ◽  
Engineering Team ◽  
Exploration And Production ◽  
Reservoir Geomechanics ◽  
Industry Professionals ◽  
Candidate Identification

Abstract To rapidly increase production from the Goliat Field without adding costly subsea equipment and infrastructure or mobilizing a high-end subsea construction vessel, an operator transformed two single-bore subsea wells into multilateral producers with independently controlled branches. A multidisciplinary team was assigned to perform a feasibility study for the introduction of multilateral wells. Work started with a reservoir geomechanics/wellbore stability review, based on which well construction/completion basis of design was made. The design and operations sequence were analyzed by a well engineering team. As a result, the main risks, uncertainties, and assumptions were clarified. Two candidate wells were identified, and then a multidisciplinary team was assigned to manage the project, finalize design, initiate procurement, and write procedures. Workshop preparation was closely monitored and reported on a weekly basis. The onshore team closely followed up and supported operational execution. The new laterals were added to the existing wells, and multilateral junctions were installed and tested. An intelligent completion was installed, and independent branch production started. In addition, the estimated reduction in generation of CO2 is estimated to be between 10 to 20 thousand metric tons per well as compared with drilling two new subsea wells and installing the associated infrastructure. The technology enables an exploration and production (E&P) company to introduce subsea reentry multilateral technology to increase production while minimizing costs. The process includes well candidate identification, planning, and execution. This practical example can be used for future reference by drilling and production-focused petroleum industry professionals to better understand the benefits and limitations of existing technologies.

Risk Due to Wellbore Instability

2014 ◽  
pp. 23-46
Author(s):  
Nediljka Gaurina-Medjimurec ◽  
Borivoje Pasic
Keyword(s):  
Risk Assessment ◽  
Early Recognition ◽  
Petroleum Industry ◽  
Wellbore Stability ◽  
Effective Solution ◽  
Wellbore Instability ◽  
Drilling Operation ◽  
General Overview ◽  
Well Design ◽  
Exploration And Production

Exploration and production as one of the most important parts of the petroleum industry encounters different problems, usually resulting in nonproductive time and additional expenses. The most common and most expensive of them are related to wellbore instability and associated problems. Wellbore instability problems are usually related to drilling operation, but they can also appear during completion, workover, or the production stage of a certain well. The traditional solution for wellbore instability problems is composed from the early recognition of specific wellbore instability problems, the main cause identification and swift response. For more effective solution it is necessary to incorporate wellbore stability and risk assessment in the early phase of well design. This chapter gives one general overview of wellbore instability problems and their causes as well as an overview of actual approaches and methods in wellbore stability and risk assessment.

Risk Due to Wellbore Instability

2015 ◽  
pp. 57-78
Author(s):  
Nediljka Gaurina-Medjimurec ◽  
Borivoje Pasic
Keyword(s):  
Risk Assessment ◽  
Early Recognition ◽  
Petroleum Industry ◽  
Wellbore Stability ◽  
Effective Solution ◽  
Wellbore Instability ◽  
Drilling Operation ◽  
General Overview ◽  
Well Design ◽  
Exploration And Production

Exploration and production as one of the most important parts of the petroleum industry encounters different problems, usually resulting in nonproductive time and additional expenses. The most common and most expensive of them are related to wellbore instability and associated problems. Wellbore instability problems are usually related to drilling operation, but they can also appear during completion, workover, or the production stage of a certain well. The traditional solution for wellbore instability problems is composed from the early recognition of specific wellbore instability problems, the main cause identification and swift response. For more effective solution it is necessary to incorporate wellbore stability and risk assessment in the early phase of well design. This chapter gives one general overview of wellbore instability problems and their causes as well as an overview of actual approaches and methods in wellbore stability and risk assessment.

Hepatitis C an Ayurvedic approach - A Case Study

2017 ◽  
Vol 2 (4) ◽  
Author(s):  
Vidyadhar Balikai ◽  
Prashanth A. S. ◽  
S. G. Chavan
Keyword(s):  
Hepatitis C ◽  
Clinical Features ◽  
Daily Basis ◽  
Diagnostic Tools ◽  
Weekly Basis ◽  
General Weakness ◽  
Loss Of Appetite

The effect of Gandharva Haritaki, Sudarshana Vati, Arogyavardhini Vati along with Punarnavadi Kashaya were studied clinically on a case of Hepatits - C by modern diagnostic tools with USG Abdomen and Hematological investigations. The review of the patient was done on daily basis in IPD and weekly basis after discharge, the clinical features like loss of appetite, heaviness of abdomen and general weakness were completely subsided during the 2nd month of treatment.

Childhood trauma, attachment style, and a couple's experience of terminal cancer: Case study

2010 ◽  
Vol 8 (2) ◽  
pp. 227-233 ◽  
Author(s):  
Linda M. McLean ◽  
Sarah Hales
Keyword(s):  
End Of Life ◽  
Childhood Trauma ◽  
Attachment Style ◽  
Multidisciplinary Team ◽  
Marital Distress ◽  
Empirical Literature ◽  
Cancer Case ◽  
Terminal Cancer ◽  
Team Approach

AbstractObjective:The primary objective of this article is to elucidate the significance of psychosocial distress and risk in a sub-population of end-stage cancer patients and their spouse caregivers who present with an especially challenging attachment style and histories of childhood trauma. The case study presented highlights the need to both identify and offer an empirically validated couple–based intervention, along with a multi-disciplinary team approach over the trajectory of the illness and at end of life.Method:A validated marital protocol (emotionally focused couple therapy [EFT]) is modified for this population and conducted by an EFT-trained psychologist as part of a pilot investigation as to the feasibility and effectiveness of EFT for the terminal cancer population. Measures of marital distress, depression, hopelessness, and attachment security are completed at baseline and subsequent intervals, as reported in another publication. Attachment insecurity and the exquisitely intimate relationship with caregiving and care receiving are underscored, given the couple's traumatic childhood history.Results:The couple described herein, followed from diagnosis of metastatic disease to end of life illuminates the potential effectiveness of a modified EFT protocol, and underscores the need to both identify and intervene with a population potentially at significantly high risk for marital distress, suicidality, depression, and hopelessness.Significance of Results:The benefits of a multidisciplinary team is evident as the patient's symptoms of physical distress increased toward end of life and she returned to earlier behaviors, namely suicidal ideation and an attempt to alleviate her experience of suffering. The strength of the marital bond, possibly as a result of the intervention, and the efforts of the multidisciplinary team approach, demonstrate potential to mitigate a catastrophic end of life and a complicated spousal bereavement. This case study adds to the current empirical literature in an area that is currently under-studied and under-reported.

Application of Computational Intelligence in Generating Synthetic Reservoir Rock Mechanical Parameters for Building Geo-Models.

2015 ◽  
Author(s):  
L. C. Akubue ◽  
A.. Dosunmu ◽  
F. T. Beka
Keyword(s):  
Neural Network ◽  
Statistical Analysis ◽  
Numerical Models ◽  
Petroleum Industry ◽  
Oil Field ◽  
Wellbore Stability ◽  
Reservoir Rock ◽  
Rock Properties ◽  
Earth Model ◽  
Sonic Log

Abstract Oil field Operations such as wellbore stability Management and variety of other activities in the upstream petroleum industry require geo-mechanical models for their analysis. Sometimes, the required subsurface measurements used to estimate rock parameters for building such models are unavailable. On this premise, past studies have offered variety of methods and investigative techniques such as empirical correlations, statistical analysis and numerical models to generate these data from available information. However, the complexity of the relationships that exists between the natural occurring variables make the aforementioned techniques limited. This work involves the application of Artificial Neural Networks (ANNs) to generating rock properties. A three-layer back-propagation neural network model was applied predicting pseudo-sonic data using conventional wireline log data as input. Four well data from a Niger-Delta field were used in this study, one for training, one for validating and the two others for generating and testing results. The network was trained with different sets of initial random weights and biases using various learning algorithms. Root mean square error (RMSE) and correlation coefficient (CC) were used as key performance indicators. This Neural-Network-Generated-Sonic-log was compared with those generated with existing correlations and statistical analysis. The results showed that the most influential input vectors with various configurations for predicting sonic log were Depth-Resistivity-Gamma ray-Density (with correlating coefficient between 0.7 and 0.9). The generated sonic was subsequently used to compute for other elastic properties needed to build mechanical earth model for evaluating the strength properties of drilled formations, hence optimise drilling performance. The models are useful in Minimizing well cost, as well as reducing Non Productive Time (NPT) caused by wellbore instability. This technique is particularly useful for mature fields, especially in situations where obtaining this well logs are usually not practicable.

Integration of Geophysical Technologies in the Petroleum Industry

2021 ◽  
Keyword(s):  
Co2 Storage ◽  
Petroleum Industry ◽  
Petroleum Exploration ◽  
Reflection Seismology ◽  
Seismic Reflection Data ◽  
Reflection Data ◽  
Advanced Students ◽  
Storage Reservoirs ◽  
Magnetic Resistivity ◽  
Exploration And Production

The most utilized technique for exploring the Earth's subsurface for petroleum is reflection seismology. However, a sole focus on reflection seismology often misses opportunities to integrate other geophysical techniques such as gravity, magnetic, resistivity, and other seismicity techniques, which have tended to be used in isolation and by specialist teams. There is now growing appreciation that these technologies used in combination with reflection seismology can produce more accurate images of the subsurface. This book describes how these different field techniques can be used individually and in combination with each other and with seismic reflection data. World leading experts present chapters covering different techniques and describe when, where, and how to apply them to improve petroleum exploration and production. It also explores the use of such techniques in monitoring CO2 storage reservoirs. Including case studies throughout, it will be an invaluable resource for petroleum industry professionals, advanced students, and researchers.

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