Dynamic Volumetric Method on Deepwater

You can use our simulators for iPhone and iPad to practice this Well Control Method:
– Drilling Simulator 3
– Well Control Simulator 2
– Well Control Simulator HD

dmv_blog_01
dmv_blog_02
dmv_blog_03
dmv_blog_04
dmv_blog_05
dmv_blog_06
dmv_blog_07
dmv_blog_08
dmv_blog_09
dmv_blog_10
wws_blog_10
Advertisements

Ton Miles Calculator

App for iPhone and iPad

tmc_20_01
tmc_20_01
tmc_20_01
tmc_20_01
tmc_20_01
tmc_20_01
tmc_20_01
tmc_20_01
tmc_20_01
tmc_20_01
wws_blog_10

The Driller’s Method Simulator

A Well Control Simulator
Kick Game based
App for iPhone and iPad

dms_blog_01
dms_blog_04
dms_blog_05
dms_blog_06
dms_blog_07
dms_blog_08
dms_blog_02
dms_blog_03
dms_blog_11
dms_blog_12
dms_blog_10

Wait and Weight Method Simulator

A Well Control Simulator
Kick Game based
App for iPhone and iPad

wws_blog_01
wws_blog_14
wws_blog_15
wws_blog_16
wws_blog_17
wws_blog_18
wws_blog_12
wws_blog_13
wws_blog_19
wws_blog_10

Kick Game 2

A Well Control Simulator
with Score like a game
App for iPhone and iPad

Challenge your friends in Oil & Gas schools or in Oilfield !!

kg2_20_01

kg2_20_02

kg2_20_03

kg2_20_04

kg2_20_05

kg2_20_06

kg2_20_07

kg2_20_08

kg2_20_09

Visit our Portfolio on the App Store

for more Oil & Gas apps for iPhone, iPod Touch, iPad and Mac OS X.

wellcontrol_portfolio

Visit our website for more Oil & Gas apps for iPhone, iPod Touch, iPad and Mac OS X.

oilgasapps_website_640

or http://www.oilgasware.com

contact@wellcontrol.com.br

Wait and Weight method on Directional Wells

 Wait and Weight method on Directional Wells

ww_on_directional_top01

During drilling operations on oil wells, there may to occur the inflow of formation fluids into the well, which is an undesirable condition. The driller should detect such events and shut-in the well immediately and to record informations corresponding to stabilization of pressures SIDPP (Shut-in Drillpipe Pressure) and SICP (Shut-in Casing Pressure) and the volume gain.

There are two methods more used to well control when the drill string (drill bit) is in the bottom of borehole (normally on drilling when reaches a formation with pressure bigger relative to the bottom hole pressure): The Driller’s Method and the Wait and Weight Method (also named Engineer ‘s Method).

The Driller’s Method is performed with two circulations. The first circulation with the original fluid to circulate the influx out of well and the second circulation to fill the borehole with a new fluid. This method can be started immediately after shut-in the well.

The Wait and Weight Method is performed just with a single circulation with the new fluid, but is necessary to wait a lag time until to prepare the new fluid to start the method.

The choice of the method

The choice between these two methods is a controversial question among professionals of oil & gas, but if the rig has already the new fluid available to control the well (the hydrostatic pressure of the new fluid is equivalent to the formation pressure), the Wait and Weight method is aplied and the control will be just with a single circulation in two steps:

Wait and Weight Method

Step 1

Replacing the original fluid in the drill string with the new fluid circulating until the drill bit. Start pump and bring the pump speed until the slow circulation rate, keeping the circulating pressure according the table “Pressure versus Pumped Strokes”, starting with the Initial Circulating Pressure (ICP) and ending with the Final Circulating Pressure (FCP).

ICP = SIDPP + Circulating Pressure @ Slow Circulating Rate (recorded previously).

FCP = Pressure(@ scr) x New Fluid Density / Original Fluid Density

Vertical Wells

On vertical section, the rate “pressure drop / stroke” is constant and the calculations can be made in 10 steps.

ww_table

ww_graph_vert

Directional Wells

On deviated section, starting on Kick-Off Point (KOP), the rate “pressure drop / stroke” is not constant. The calculations will consider the steps by 100 strokes each.

ww_direc_calcs

ww_dir_table_calcs

ww_graph_dir2

Step 2

Continue the circulation with the new fluid to fill the all annular until the surface keeping the circulating pressure constant equal to FCP – Final Circulating Pressure.

Operational Limits

It is very important to monitor operational limits during the circulation to avoid fracture of the formation, usually at the shoe depth of the last casing.

The advantage of the “Wait and Weight” method is to provide a lower resultant pressure at the shoe depth before the gas reaches the shoe depth, that is, when the new fluid passes through the drill bit, increasing the hydrostatic pressure in the annulus before of the gas to reach the shoe depth.

ww_limits

Conclusion

The Wait and Weight method is advantageous when the rig has already the new fluid available to immediate circulation. Normally the new fluid need a lag time to be prepared. (1) On well closed, an influx of gas is moving up continuously and pressurizing the borehole all the time. (2) The calculations to control directional wells are relatively complex.

If it is not possible for the new fluid to reach the annulus before the gas reaches the shoe depth, due to (1) the lag time to prepare the new fluid or (2) the volume of the drill string is greater than the volume of the annulus above the gas until the shoe depth or (3) the difficulty to calculations on directional wells or (4) formations with low fracture pressure on deepwater for example, it is recommended choose the “Driller’s Method” to start immediately after the shut-in the well, holding the circulation pressure equal to Initial Circulating Pressure until the circulation of the total volume of the annulus and to replace the fluid only in the second circulation of this method.

I hope that this simple explanation about the Wait and Wait method on directional wells helps on choicing the method most efficient.

 

Well Control Methods apps: 


iOS and Mac

iOS ( FREE! )

iOS and Mac

iOS and Mac

iOS and Mac

Well Control Worksheets apps:


iPad ( FREE! ) Mac

iPad and Mac

iPad and Mac

iPad and Mac

 

Visit our Portfolio on the App Store

for more Oil & Gas apps for iPhone, iPod Touch, iPad and Mac OS X.

Portfolio_2107_4x5

Visit our website for more Oil & Gas apps for iPhone, iPod Touch, iPad and Mac OS X.

oilgasapps_website_640

http://www.oilgasware.com

contact@wellcontrol.com.br

Drilling Simulator 3 – Update for the new iPhone X

Drilling Simulator 3

 designed for both iPhone and iPad

Drilling Simulator 1:

– Drilling on vertical well, kick detection, shut-in, stabilisation of pressures (sidpp, sicp, kick volume), save to iCloud to import from other app “Well Control Simulator”.

Drilling Simulator 2:

all of drilling simulator 1 PLUS Direcional and horizontal wells, well control using 01 choke and 01 single kick bubble on borehole and graphical analysis.

Drilling Simulator 3 (This App)

all of drilling simulator 2 PLUS:

1 – until 03 single kick bubbles on the borehole simultaneously

2 – standpipe manifold and choke manifold with 02 chokes and straight through

3 – Complications: failures schedule with Random option:

– Mud Pumps 1 and 2 “power end failure” or “fluid end failure”,

– Chokes 1 and 2 “plugged” or “washed”,

– One Drill Bit Nozzle “plugged” or “washed”

New in the next update (version 1.2 – Coming soon):

– Added interface for the new iPhone X

 

ds3_iPhoneX_mainv

ds3_iPhoneX_h

 

Available_on_the_App_Store_Badge_US_UK_135x40_0824

User Guide for iPad Download PDF (51 MB)

 

Visit our Portfolio on the App Store

for more Oil & Gas apps for iPhone, iPod Touch, iPad and Mac OS X.

wellcontrol_portfolio

Visit our website for more Oil & Gas apps for iPhone, iPod Touch, iPad and Mac OS X.

oilgasapps_website_640

or http://www.oilgasware.com

contact@wellcontrol.com.br