This document provides calculations for a subsea kill operation on a drilling project. It includes details of the well geometry like total vertical depth, shoe depth, drill pipe and drill collar lengths. It calculates volumes from surface to bit, bit to surface, and total well system volume. It also determines equivalent mud weight, injection control pressure, kill mud weight, and number of pump strokes needed to displace the kill mud.

1. Subsea kill
Calculations
(Drilling Project)
Ali Nasser Ruba Alsoheil
May Khamis Mhmd Noureddine
Ranin Mazloum Eva Gandour
Presented to: Dr. Hasan Hamieh
Date: 5-24-2021

2. Table Of Contents
01 Given
02 Surface to
bit volume
03
Bit to
surface
volume
04
05
Additional
Calculations
Pump
strokes and
duration

3. Well depth (TVD) 13680
Well depth (MD) 13765
Shoe depth (TVD) 9750
Shoe depth (MD) 9750
Drill Collars length 785
HW DP length 645
Chokeline length 930
Riserlength 800
AirGap 75
Well Data
Drill pipe closed end displacement 0.0255
Drill collars 0.0077
HWDP 0.0088
Chokeline 0.0087
5" DP 0.01776
Riser 0.388
Capacities (bbls/ft)
Depth (ft) and Capacities (bbls/ft)
DC-OH 0.0292
DP/HW-OH 0.0459
DP-Casing 0.0489
AnnularVolumes (bbls/ft)

4. Surface to bit
volume
Drillstringcapacity Capacity(bbls/ft) Length(ft) Volume (bbls)
DrillPipe 0.01776 12335 219.0696
HW/DP 0.0088 645 5.676
DrillCollars 0.0077 785 6.0445
Total 13765 230.7901
Surface toBitVolume
Well depth (MD) – Length
of HW/DP and DC
Volume = Length * Capacity

5. Bit to Surface Volume
Volume = Length * Capacity
Values bolded in blue are
given
Annular Capacities Capacity (bbls/ft) Length (ft) Volume (bbls)
DP*Riser 0.3625 800 290
Chokeline 0.0087 930 8.091
DP*Casing 0.0489 8950 437.655
DP*Hole 0.0459 2585 118.6515
HW/DP*Hole 0.0459 645 29.6055
DC*Hole 0.0292 785 22.922
Total 13765 616.925
Bit to Surface Volume
Riser Capacity – Drill pipe
closed end displacement

6. Bit to shoe = DC/Hole + DP/hole+ HWDP/ hole
Total well system volume = Surface to bit volume + Bit to
surface volume
Total Active volume = Total well system volume +Surface
active volume
230.7901
616.925
171.179
847.7151
1177.7151
TotalWellSystemVolume (bbls)
TotalActive FluidSystem(bbls)
TotalDrillStringVolume (bbls)
TotalAnnularVolume (bbls)
BittoShoe Volume (bbls)
Surface Active Volume (bbls) 330

7. SIDPP(psi) 890
SICP(psi) 1050
Kick size (bbls) 29
Shut indata
Output (bbls/stk) 0.103
Current Mud Weight (ppg) 11.6
Test Mud (ppg) 10
Surface leak off pressure (psi) 2115
Sea Water Density (ppg) 8.6
Triplex Pumps (1&2)
Given

8. • Pressure = 0.052*shoe depth* mud
• Formation breakdown gradient = (Surface leak off
pressure+ Hydrostatic head of mud to shoe)/ shoe
depth
• Maximum equivalent mud weight= Formation
breakdown gradient/0.052
5070
0.736923077
14.17159763
Hydrostaticheadofmudtoshoe(psi)
FormationBreakdowngradient(psi/ft)
Maximumequivalentmudweight(ppg)

9. 𝐊𝐢𝐥𝐥 𝐦𝐮𝐝 𝐰𝐞𝐢𝐠𝐡𝐭 =
𝑺𝑰𝑫𝑷𝑷
𝑩𝒊𝒕 𝒅𝒆𝒑𝒕𝒉 (𝑻𝑽𝑫)
𝟎. 𝟎𝟓𝟐
+ 𝑷𝒓𝒆𝒔𝒆𝒏𝒕 𝒎𝒖𝒅
MAASP= (Maximum equivalent mud weight – Present Mud)* 0.052 * shoe depth
ICP = SIDPP + SCR
FCP = SCR *
𝑲𝒊𝒍𝒍 𝒎𝒖𝒅
𝑷𝒓𝒆𝒔𝒆𝒏𝒕 𝒎𝒖𝒅

10. Strokes= Volume*Pump Output for strokes
Minutes = strokes/ SPM
Riser 695
Chokeline 885
SPM 35
SlowPump Rate (SCR) (psi)
strokes to minutes
Surface line Strokes (stk) 3203.883495 91.53952843
Surface To Bit Strokes (stk) 2240.680583 64.01944521
Bit to Shoe Strokes (stk) 1661.932039 47.48377254
Bit to BOP Strokes (stk) 5911.009709 168.8859917
Chokeline Strokes (stk) 78.55339806 2.244382802
Pump Strokes
Surface Active Volume (bbls) 330
Total Drill String Volume (bbls) 230.79
Bit to Shoe Volume (bbls) 171.179
Chokeline 8.091
Bit to Shoe Volume (bbls) 171.179
DP*casing 437.655

11. (ICP-FCP)/10 =81.5
Surface to bit strokes/10
0
200
400
600
800
1000
1200
1400
1600
1800
0 500 1000 1500 2000 2500
Pressure
(psi)
Strokes (min)
Surface to bit Pressure drop

12. Thanks!