Well Control Procedures in Deep Water

1994 ◽  
Author(s):  
A.C.V. Martins Lage ◽  
E.Y. Nakagawa ◽  
A.G.D.P. Cordovil
Keyword(s):  
Deep Water ◽  
Well Control ◽  
Control Procedures

MANAGEMENT OF THE UNIACKE G-72 INCIDENT

1985 ◽  
Vol 1985 (1) ◽  
pp. 311-313 ◽  
Author(s):  
S. D. Gill ◽  
C. A. Bonke ◽  
J. Carter
Keyword(s):  
Monitoring Program ◽  
Chemical Properties ◽  
Well Being ◽  
Gas Well ◽  
Well Control ◽  
Drilling Rig ◽  
Sampling Program ◽  
Control Procedures ◽  
Physical And Chemical ◽  
And Chemical Properties

ABSTRACT During the evening of February 22, 1984, the Uniacke G-72 gas well being drilled 150 nautical miles off Halifax, Nova Scotia, by the semisubmersible drilling rig, Vinland, under contract to Shell Canada Resources, blew out of control, emitting gas and condensate at an estimated rate of 300 bbl per day. During the following 10 days while Shell was assembling personnel, vessels, and equipment for reboarding the rig and initiating well control procedures, a comprehensive environmental monitoring program was put in place. An air, slick, and water column sampling program was initiated to provide information on the physical and chemical properties of the condensate. This paper describes the primary findings of the program that involved the coordination of government, area petroleum operators, and consultants.

Well Control Procedures for Dual Gradient Drilling as Compared to Conventional Riser Drilling

2006 ◽  
Vol 21 (04) ◽  
pp. 287-295 ◽  
Author(s):  
Jerome J. Schubert ◽  
Hans C. Juvkam-Wold ◽  
Jonggeun Choe
Keyword(s):  
Well Control ◽  
Control Procedures ◽  
Dual Gradient

Study on Safety Operation Period Model of Deep Water Typhoon Avoidance Well Control Considering Rheological Characteristics of Drilling Fluid

2020 ◽  
Author(s):  
Wenqiang Lou ◽  
Zhiyuan Wang ◽  
Kai Du ◽  
Jianbo Zhang ◽  
Youqiang Liao ◽  
...  
Keyword(s):  
Prediction Model ◽  
Yield Stress ◽  
Deep Water ◽  
Bubble Size ◽  
Drilling Fluid ◽  
Great Influence ◽  
High Yield ◽  
Initial Size ◽  
Pore Characteristics ◽  
Well Control

Abstract During the period of avoiding typhoon in deep-water drilling, the gas intrusion in the wellbore brings higher risk to the well opening operation. It is very important to improve the accuracy of typhoon avoidance cycle prediction to improve the efficiency of drilling operation and reduce the risk of well control. According to the yield stress characteristics of drilling fluid, the gas migration experiment in the yield stress fluid is carried out in this paper. Based on the experimental results and stress analysis, a prediction model of bubble rising velocity suitable for the yield drilling fluid is established. Considering the rheological properties of drilling fluid and pore characteristics of formation, a prediction model of initial bubble size is established. Combined with the velocity prediction model and bubble size prediction model, the calculation method of typhoon avoidance period is proposed. Through the calculation and analysis, it is found that under the condition of low invasion rate, the formation porosity has little influence on the initial size of bubbles, and the yield stress value of drilling fluid has great influence on the initial size of bubbles. At the same time, the model in this paper makes up for the problem that the prediction value of safe typhoon avoidance period calculated by the previous model is large, and reduces the risk of well opening operation. According to our calculation results, the measures of injecting drilling fluid with low yield stress at the bottom of the well and injecting drilling fluid with high yield stress at the top are put forward, which can effectively increase the safe typhoon avoidance period.

Sign in / Sign up

Export Citation Format

Share Document