Computer Simulation of the Reverse Circulation Well Control Procedure for Gas Kicks

1992 ◽  
Vol 7 (04) ◽  
pp. 247-253
Author(s):  
S. Miska ◽  
F.E. Beck ◽  
B.S. Murugappan
Keyword(s):  
Computer Simulation ◽  
Control Procedure ◽  
Well Control ◽  
Reverse Circulation

A Well Control Procedure for Wells with High Rate Upward Crossflow

2018 ◽  
Author(s):  
Mohamed M. El-Nekhily ◽  
Nasser M. Al-Hajri ◽  
Ibraheem M. Al-Ageel ◽  
Ibrahim A. Al-Obaidi
Keyword(s):  
High Rate ◽  
Control Procedure ◽  
Well Control

Time Step Method of Computer Simulation Process Control

2014 ◽  
Vol 494-495 ◽  
pp. 1257-1261 ◽  
Author(s):  
Ming Hai Yao ◽  
Xiao Ji Chen ◽  
Lei Zuo
Keyword(s):  
Computer Simulation ◽  
Process Control ◽  
Control Procedure ◽  
Simulation Technology ◽  
Step Method ◽  
Time Step ◽  
Work Time ◽  
Wide Range ◽  
First Time ◽  
Time Step Method

With the development of information technology, computer simulation technology has become a necessary mean for many complex systems analysis, design, testing, evaluation and other work. Time step method to carry on the research is applied in this paper according to the situation of simulation on time process control complex for computer. First, time step method mechanism describes by graphics; Then, we can research on the simulation of process control procedure, including the system's entity scan, all kinds of events scan, entities and events to combine scan; Finally, we can study on the same time step method that usually used on the computer simulation of process control. Content of this study provide technical and methodological support for computer simulation. With the deepening understanding for computer simulation technology, computer simulation of process control based on the time step method is bound to get a wide range of applications.

Kick Management Study on Automated Well Control for Managed Pressure Drilling in Long Wells

2018 ◽  
Author(s):  
Amare Leulseged ◽  
Sima A. Nepal ◽  
Dan Sui ◽  
Suranga C. H. Geekiyanage
Keyword(s):  
Surface Pressure ◽  
Flow Model ◽  
Transient Flow ◽  
Pressure Profile ◽  
Pressure Control ◽  
Control Procedure ◽  
Well Control ◽  
Managed Pressure Drilling ◽  
Drilling Technology ◽  
Advanced Drilling

In drilling operations, the downhole pressure (BHP) requires to be closely monitored and precisely managed to avoid potential drilling events harmful to personnel and environment. If the BHP is lower than the pore pressure, kick (amount of influx) from formation will enter the wellbore, which might result in (underground) blowout. If not properly managed, this could be more costly than surface blowouts [1]. Well control aims to stop and remove the influx and re-establish primary barriers. Managed Pressure Drilling (MPD) is an advanced drilling technology capable of precisely controlling annular pressure profile throughout the wellbore. In this study, a high fidelity transient flow model is used for simulating dynamic well control procedure in MPD to properly manage annular pressure during kick circulation after the kick is detected. In this work, an automated well control in MPD is simulated, where PID control algorithm is implemented by manipulating choke valve opening to dynamically regulate the BHP during kick circulation. The main aim is to investigate dynamic kick management with the use of different type of muds, water based mud (WBM) and oil based mud (OBM). For different mud systems, the well control performances for long extended reach wells are evaluated and compared. From simulations, it shows that the OBM is able to hide the influx to a large extent, than the WBM due to the much higher gas solubility of the OBM. In HPHT wells, the OBM is superior to the WBM with proper automatic surface pressure control in MPD operations. Using complicated dynamic flow model can provide more precisely surface pressure control for realtime dynamic kick management.

Mud-Gas Separator Response to Well Control Procedure

1994 ◽  
Author(s):  
M.D. Williamson ◽  
R.A. Dawe
Keyword(s):  
Control Procedure ◽  
Well Control ◽  
Gas Separator

The Killing Method of Exceptional Operating Conditions Well

2012 ◽  
Vol 524-527 ◽  
pp. 1628-1633
Author(s):  
Qi Ji Yuan ◽  
Zheng Zheng
Keyword(s):  
Natural Gas ◽  
Operating Conditions ◽  
Liquid Column ◽  
Calculation Procedure ◽  
Control Mode ◽  
Control Procedure ◽  
Drilling Tool ◽  
Well Control ◽  
Control Equipment ◽  
Form Design

During the process of drilling, overflow happens when the waterhole blocks, drilling tool breaks off and drops into the well, or empty hole occurs after hoisting completed. In course of the workover operation, overflow happens while oil tube fracturing, blocking up, and occurring empty well or can’t flow. As it is difficult to establish effective fluid cycling for such type of well when overflow occurs, conventional killing well method cannot handle the problem of overflow for the well in special operating conditions. The so-called special operating conditions well have intact well head control equipment, but unable establish cycling after the overflow well shut in. The paper is aimed at finding out the non-routine well control procedure to deal with the overflow of the well in special operating conditions. Study the well killing technology in four situations. The situation included the well is full of natural gas, lower of the well is liquid column and upper of the well is natural gas, the wellbore blocks and unable establish cycling for containing liquid column, besides the wellbore holds fish where the fish is intact and doesn’t block the wellbore, the fish blocks the wellbore or the fish is breakup and blocks the wellbore. Discuss the principles, steps, calculation procedure and formulas of killing well in volumetric control mode. The result is applied in one of the non-conventional wells’ workover operation in the eastern of Sichuan. This paper simulates the calculation of killing well and reveals the killing well curves and form design.

Characterization of Modulated Structure Through Structure Images and their Computer Simulation

1990 ◽  
Vol 48 (1) ◽  
pp. 70-71
Author(s):  
Kiyomichi Nakai ◽  
Yusuke Isobe ◽  
Chiken Kinoshita ◽  
Kazutoshi Shinohara
Keyword(s):  
Computer Simulation ◽  
High Resolution ◽  
Spherical Aberration ◽  
High Resolution Electron Microscopy ◽  
Basic Mechanism ◽  
Objective Lens ◽  
Specimen Thickness ◽  
Transmitted Beam ◽  
Modulated Structure ◽  
Resolution Electron

Induced spinodal decomposition under electron irradiation in a Ni-Au alloy has been investigated with respect to its basic mechanism and confirmed to be caused by the relaxation of coherent strain associated with modulated structure. Modulation of white-dots on structure images of modulated structure due to high-resolution electron microscopy is reduced with irradiation. In this paper the atom arrangement of the modulated structure is confirmed with computer simulation on the structure images, and the relaxation of the coherent strain is concluded to be due to the reduction of phase-modulation.Structure images of three-dimensional modulated structure along <100> were taken with the JEM-4000EX high-resolution electron microscope at the HVEM Laboratory, Kyushu University. The transmitted beam and four 200 reflections with their satellites from the modulated structure in an fee Ni-30.0at%Au alloy under illumination of 400keV electrons were used for the structure images under a condition of the spherical aberration constant of the objective lens, Cs = 1mm, the divergence of the beam, α = 3 × 10-4 rad, underfocus, Δf ≃ -50nm and specimen thickness, t ≃ 15nm. The CIHRTEM code was used for the simulation of the structure image.

Computer simulation of a dental practice using therapists

1972 ◽  
Vol 36 (6) ◽  
pp. 35-39
Author(s):  
JB Dilworth ◽  
WJ Pelton
Keyword(s):  
Computer Simulation ◽  
Dental Practice

Averting robo-bees: why free-flying robotic bees are a bad idea

2019 ◽  
Vol 3 (6) ◽  
pp. 723-729
Author(s):  
Roslyn Gleadow ◽  
Jim Hanan ◽  
Alan Dorin
Keyword(s):  
Climate Change ◽  
Computer Simulation ◽  
Food Security ◽  
European Countries ◽  
Plant Interactions ◽  
Plant Insect Interactions ◽  
Native Habitat ◽  
Insect Pollinators ◽  
Insect Interactions

Food security and the sustainability of native ecosystems depends on plant-insect interactions in countless ways. Recently reported rapid and immense declines in insect numbers due to climate change, the use of pesticides and herbicides, the introduction of agricultural monocultures, and the destruction of insect native habitat, are all potential contributors to this grave situation. Some researchers are working towards a future where natural insect pollinators might be replaced with free-flying robotic bees, an ecologically problematic proposal. We argue instead that creating environments that are friendly to bees and exploring the use of other species for pollination and bio-control, particularly in non-European countries, are more ecologically sound approaches. The computer simulation of insect-plant interactions is a far more measured application of technology that may assist in managing, or averting, ‘Insect Armageddon' from both practical and ethical viewpoints.

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