App Chap 4

AFPC Drilling Operations Manual Chapter 4 - Appendices

Chapter 4 - Rig Moves and Site Preparation Appendices

Topic

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See Page

Appendix A - New Drilling Location Handover Certificate

iii

Appendix B - Workover Rig Well Re-entry Notification Fax

iv

Appendix C - Well Handover Certificate

v

Appendix D - Well Integrity Status Diagram

vi

Appendix E - Example Completion Status Diagram

vii

Appendix F -Casing and Cementation Status Form

viii

Appendix G - Pits on Location

ix

Appendix H - Workover Rig Well Re-entry Location Handover Form

x

Appendix I - Drilling and Workover Location, Construction and Restoration Workscope

xi

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Appendix A - New Drilling Location Handover Certificate For new drilling location only. Location pits Flare pit Cement waste pit Seismic pit Septic pit Burning pit Waste pit

Location: ________________ 8x8x2m 3x3x1m 4 x 4 x 4 m (depth is critical) 3x3x3m 10 x 4 x 2 m 50 x 10 + 30 x 20 m,5 - 3 1/2 m deep Edge of waste pit 20 m from centre of well

yes/no yes/no yes/no yes/no yes/no yes/no yes/no

Additional Is there an area for chemical storage on the north side Is there an area for pipe bins on the south side Is there bund wall/ditch around location to stop traffic entering through desert Is the condition of the access roads acceptable. Is the surface condition acceptable to ODE staff

yes/no yes/no yes/no yes/no yes/no

Location dimensions North side 67 m West side 80 m South side 65 m East side 38 m Camp Location Dimensions 98x40 m Burning pit 3x8x2 m Sewage pit 3x10x2 m Access road acceptable Surface acceptable Min dist. to rig 400 m Rig location SE to NE.

yes/no yes/no yes/no

Environmental aspects 1) Is location in ecologically sensitive area? 2) Has aquifer been penetrated? 3) Is lining required in pits? 4) Was vegetation removed? 5) Is water drainage disrupted? 6) Are designated access roads sign posted? 7) Are dwellings or agricultural land nearby? 8) Has access to the above been disturbed? 9) Has damage been caused to agricultural land? Observations:

yes/no yes/no yes/no yes/no

Cellar Dimensions 3x4x2.75 m. Clean and structurally sound

yes/no yes/no yes/no yes/no

yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no

yes/no yes/no

Hazards Underground pipes lines Underground/overhead power lines Others:

yes/no yes/no

OCM confirms that the location has been constructed according to the relevant specifications of the Drilling Department Handed over for civil contractor by: Name: Ref. Ind.:

Signature: Date:

Accepted for ODE by:

Name: Ref. Ind.:

Signature: Date:

Accepted for drilling contractor :

Name: Ref. Ind.: Company :

Signature: Date:

`

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Appendix B - Workover Rig Well Re-entry Notification Fax TO:

FAX: IND:

AREA SUPERINTENDENT FIELD:

TO:

FAX: 158

CIVIL CONTRACTOR

CC: CC:

FAX: 139 FAX: 127

ODE/95 ODE/14(141)

FROM:

RIG:

DSV:

DATE: SUBJECT:

LOCATION PREPARATION FOR WORKOVER RIG WELL RE-ENTRY.

WELL ACCOUNT NUMBER LOCATION PRE-INSPECTION DATE LOCATION PRE-INSPECTED BY LOCATION TO BE READY BY

: : : : :

There is a workover re-entry planned on the above mentioned well. Please find below the preparations required on the well and camp locations to allow the workover rig to access the locations. Well location and well condition preparation requirements: Item

Description

Special requirements (e.g. LSA): Camp location preparation requirements: Camp site position ( m in direction from the well location) Item Description

REGARDS, SIGNED

:

ATTACHMENT 1

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:

WELL LOCATION MINIMUM DIMENSIONS.

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Appendix C - Well Handover Certificate General

Completion Details

Type of well Status of Well* Handover date H2S Present CO2

Completed by Rig Date Completed SC-SSSV Type Depth (m) Pres. Rating (psi)

Yes/No Yes/No

% %

* Enter completed or Suspended

Well Technical Details Drilled by Rig Date spudded Date suspended* TD HUD Max. deviation Depth. Max. deviation DFE

(psi)

∆L Driller / Schlumb. (m) DFE to THS (m) (m) (m)

AH AH

TVD TVD

(m) (m) * Enter only if applicable

Well Status Tubing / annulus Details “A” Annulus “B” Annulus “C” Annulus Tubing Remarks*

Tested to

Surf. Pressure Psi

MAASP Psi

Wireline Plug(s) Installed BPV Installed Xmas Tree complete** All wellheads valves closed All Xmas tree valves closed Gauges installed Valve handles supplied

Size Yes/No Yes/No Yes/No Yes/No Yes/No Yes/No Yes/No

Contents (from which the MAASP is derived)

Depth

PPG

Type

Remarks:

* e.g. observed casing wear, cement bond deficiencies, etc. ** e.g. blind flanges, Xmas tress cap, gauges installed, etc

Location Status Cellar clean, in good condition Site cleared

Tested to Psi

Yes/No Yes/No

Remarks:

Yes/No Yes/No Yes/No Yes/No

Remarks:

Attachments Drilling well status diagram* Completion status diagram* Wellhead/location diagram Wellsite restoration checklist Other attachments

General remarks

Drilling representative Name Ref ind

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* May be combined into one diagram

Sign Date

Prod’n representative Name Ref ind

Sign Date

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Appendix D - Example Well Integrity Status Diagram

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Appendix E - Example Completion Status Diagram RIG ELEV. THS

BDF

ISB 106 COMPLETED MAX. DEV. Deg. HUD. MBDF DESCRIPTION 11" x 5" TBG HGR

5" 15#/ft. 13 Cr. VAM TBG. PLASTIC COATED 5" x 4 1/2" X-OVER

3.81”

3.81" CMD SSD

PBR 80-45

7" SABL-3 PKR. 85-47-38 5" M.O.E

PERFS: 3.81" CMD SSD

3.81”

7" FB-1 PACKER 85-40 LE-22 LOCATOR SEAL 5" M.O.E 2.75" F NIPPLE PERF. PUPJOINT

2.75” PERFS:

2.75" R NIPPLE

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WEG

TBG. VOL. TO SSD:

HUD

ANN. VOL. TO SSD: BBL ANN. FLUID. IN: WATER LAST UPDATE:

BBL

2.69”

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Appendix F - Casing and Cementation Status Form Location : Rig : Spud Date : Release Date :

18 5/8" Casing : lb/ft Grade: Connection: 18 5/8" Casing Shoe :

DF-GL DF-THS DF-TBF TD

: : : :

Mud Type: Weight:

ppg

m

m m m m

13 3/8" Casing : lb/ft Grade: Connection: 13 3/8" Casing Shoe :

m

0m 9 5/8" Casing : lb/ft Grade: Connection:

Mud Type: Weight:

ppg

Cement: Lead: W eight : Tail: W eight :TTOC:

Class ppg Class ppg m

LOT: Mud Type: Weight:

Cement: Lead: W eight : Tail:

m - shoe 9 5/8" Casing : lb/ft Grade: Connection:

ppg OBM ppg

Class ppg Class

W eight : TTOC:

Top of Liner:

ppg m

m

9 5/8" Casing Shoe:

m

7" Liner :

LOT: Mud Type: Weight:

ppg OBM ppg

Cement: Class:

lb/ft Grade: Connection:

Weight :TTOC:

HUD: 7" Shoe:

m m

TD :

m

ppg m

All depths reference the original Drill Floor Elevation

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Abbrevations used

Well Name

Status

Status

Action

Trash

Mud Action

Status

Action

BKF = backfill in case of dry cuttings REM = remove wet cuttings to start dry process BRN = burn trash CLR = clear location of major rubbish other than burnable CLN = clean up

ACTION

MT = empty OIL = oil SND = sand RUB = rubbish OBM = oil base mud WBM = water base mud WAT = water OWC = oil wet cuttings WWC = water wet cuttings DRY = dry cuttings

STATUS

Cellar

Burn Action

Action

Status

Nowsco VSP

Oil Test Action

Location

Flair

Sceptic

Action

Action

Status

Status

PITS ON LOCATION

AFPC Drilling Operations Manual Chapter 4 - Appendices

Appendix G - Pits on Location

ix

Status

Action

Status

Status

Action

Status

AFPC Drilling Operations Manual Chapter 4 - Appendices

Appendix H - Workover Rig Well Re-entry Location Handover Form Location/pits Waste pit

10 x 20x 2 m

yes/no

Additional Is there an area for chemical storage on the north side Is there an area for pipe bins on the south side Is there a bund wall/ditch around location to stop traffic entering through desert Is edge of waste pit a min. of 14 m away from centre of well. Is the condition of the access roads acceptable. Is flow line removed. Are flow line supports removed. Is area around cellar level with top cellar. Is area of 50 x 30 m as indicated on request levelled and compacted Is the surface condition acceptable to ODE staff Location dimensions North side 60 m West side 50 m South side 50 m East side 38 m

yes/no yes/no yes/no yes/no

Camp Location Dimensions 98x40 m Access road acceptable Surface acceptable Min dist. to rig 400 m Rig location SE to NE.

yes/no yes/no yes/no yes/no yes/no

HSE aspects 1) Is lining required in pits? 2) Is water drainage disrupted? 3) Are designated access roads sign posted? 4) Are dwellings or agricultural land nearby? 5) Are NORM levels measured in flow line. 6) Is radiation survey report completed. 7) Is NORM contaminated flow line capped and removed to 100 m away from the location. 8) Are buried pipelines/power cables marked 9) Are there overhead power lines present Cellar Dimensions 3x4x2.75 m. Clean and structurally sound

yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no yes/no

Remarks Hand-over form is only valid when well-over certificate is attached.

OCM confirms that the location has been constructed according to the relevant specifications of the Drilling Department Handed over for civil contractor by: Name: Ref. Ind.:

Signature: Date:

Accepted for ODE by:

Name: Ref. Ind.:

Signature: Date:

Accepted for drilling contractor :

Name: Ref. Ind.: Company :

Signature: Date:

`

Appendix I Revision 0 June 1998

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Drilling Workover Location construction and Restoration Workscope - 053/NORM/INST/GEN/ODE/1

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HSE Considerations OCM should ensure, before any work on any location is carried out, that they and their contractors are fully informed of the circumstances of the respective activity (e.g.): • Presence of LSA • High pressure pipe lines or control lines • H2S • Underground cables/pipe lines • Special environmental aspects.

The Area Superintendent should be approached for the necessary permits to work in all cases (new locations re-entry/workover locations location restoration).

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Drilling Location Construction Definitions

Platform The levelled area where the rig and all associated equipment are located and generally measures 125 x 98 m. Cellar Concrete pit 4 x 3 x 2.75 m inside containing a conductor (24in or 30in). Waste Pit Pit required to accumulate drill cuttings and waste mud. Cement Pit Pit required to receive spilled and left over mixed cement and cement wash water. Septic Pits These pits are used to receive the rig and campsite kitchen and caravan ablution drains. Trash Pit A small pit used to burn domestic and industrial refuge. V.S.P. Pit Pit of 4 x 4 x 4 m. is to be filled with mud or water and is used for seismic survey logs. Flare Pit Located at the end of the horizontal flare in and is used to receive oil and oil/gas contaminated mud during well killing operations. Note: Oil Test Pit: This pit was used in the past to receive oil produced during a production test. No longer constructed since '92. Burner Pit: This pit was used in the past to locate the flare or burner and contain spills/carry over. No longer constructed since '92. Continued on next page

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Drilling Location Construction, Continued Location Site

Clearing and Stripping Platform is to be cleared of all the debris, bushes and trees. However, note that trees with a trunk diameter in excess of 10 cm may only be removed after written permission from ODE/HSE. The platform is to be stripped of unsuitable materials, removing soft spots as required. Where fill is required the material shall be spread in even layers and compacted by a vibration roller Levelling Drill site platform shall be levelled to the required dimension as indicated on Figure (4.i). Fill area should be back filled at layers no more than 20 cm evenly spread, watered and compacted. Finishing is to be done by fine grading the compacted materials, watering and steel wheel rolling to seal the surface and provide an all weather access. An area called 0.0 (where the rig foundation is located) should be levelled +/-1 cm from the top of the cellar. The remainder of the platform should be levelled 10 cm (see Figure (4.i)).. Surface materials shall conform to standard sieve grading specification (see table in Road Construction, Standards). Along the excavated edge of the location a 0.3 m deep drain is to be provided. Cellar A cellar with conductor hole shall be excavated as per Figure (4.ii). The conductor pipe has to be installed as plumb as possible (max. deviation <2 cm per 5 m). The conductor pipe is to be free of dents and drifted as follows: • 30in conductor • 24in conductor

28in drift 23in drift

Cellar walls and bottoms should be constructed from re-enforced concrete. Cellar walls should have a minimum thickness of 30 cm. No back fill of other materials between the cellar wells, bottom and the ground. Continued on next page

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Drilling Location Construction, Continued Location Site, continued

Cellar, continued Concrete fill around the conductor pipe and the cellar floor has to be poured in one phase. The concrete surface shall be free of honey-combs or exposed aggregate. Cement ratio 300 kgs/m3 class B range of aggregate no.4 (see following table).

Class of Concrete Size

Minimum Cement Concrete

Range of Coarse Aggregate

A (1.1/2)

330 Kgs/m3

1.1/2in - No. 4

Min. Site 28 Day Compressive Strength on 15 cm cubes 270 Kgf/cm2

A (3/4)

330 Kgs/m3

3/4in - No.4

270 Kgf/cm2

B (1.1/2)

300 Kgs/m3

1.1/2in - No. 4

210 Kgf/cm2

B (3/4)

300 Kgs/m3

3/4in - No.4

210 Kgf/cm2

C

-

-

180 Kgf/cm2

Special (A)

400 Kgs/m3

3/4in - No.4

420 Kgf/cm2

Special (B)

400 Kgs/m3

3/4in - No.4

360 Kgf/cm2

Pits Pits are to be excavated as per Figure (4.i) and the waste pit as per Figure (4.iii). The volume of the waste pit is designed for 4 000-4 500 m3. In those cases where the terrain of the location shows that the waste pit is located in a low laying area or on a down ward slope and the location higher, bund walls can be constructed to contain the waste mud and cuttings. Note:

Road Construction

The waste pit has always to be accessible for vacuum trucks. It has to be constructed in such a way that restoration is feasible.

See Figure (4.iv) and (4.v) Road Bed After staking the road, construction should be done as follows: • Strip an 11 m sub-base (minimum 10 cm deep). • Water and compact the sub-base before adding a base layer. • Soft spots should be excavated and back filled with gravel in layers not exceeding

20 cm.

• Longitude sub-base levels to be kept with in 10 %. Cuts and fills are to be made to

stay within this parameters.

Continued on next page

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Drilling Location Construction, Continued Road Construction, continued

Road Design • Curves between 2 striates R=1000 m. • Out side curve is to be raised 20 cm above the inside curve. • Road curves at junctions for inter-section shall have a minimum radius of 50 m. • Road surface shall be visible for a distance of 350 m at a height of 1.5 m in the road centre. • The “crown” of the curves, 1 m. should be added to the width, (so 8 m. instead of 7 m). Culverts Culverts will be placed taking advantage of the natural drainage. Culverts shall be installed with the bottom below the ditch line but not more than 8 cm below ground level and shall be installed with a minimum of 30 cm of cover.

Camp Area

See Figure (4.vi). Camp Location 98 x 40 x 0.25 m. The camp has 2 pits: • Septic pit • Trash pit

3x3x3 10x4x3

The camp should be located up wind from the well site and at a safe distance to assure that in case of hydrocarbon or H2S release this does not reach the camp The prevailing wind in the Deir Ez Zor area is westerly to north westerly. The rig and camp should be separated 400 m minimum and 500 m maximum. It should be avoided to have road crossings between rig and camp (see ODE alert 96/004). Continued on next page

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Drilling Location Construction, Continued Standards

Table Of Course Materials Percentage Passing Sieves By Weight Grading

Sieve A

B

C

5 cm

100

100

-

2.5 cm

-

75-95

100

1 cm

30-65

40-75

50-85

No-10=2 mm

15-40

20-45

25-50

No-40=4 mm

8-20

15-30

15-30

No-200=0.07 mm

2-8

5-20

5-15

The passing for sieve No-200 = < 2/3 of passing sieve No-40 Liquid Limit LL = <35 Plastic Index PI = <11 Minimum CBR = 60 Proctor Test = 95 % The compression strength at the platform should be at least 120 psi. All surfaces should always be able to sustain all-weather activity, including the usual amount of vehicle movement. Quality of material and of work execution should be such as to guarantee this. In this respect, consideration should be given to special seasonal geographic aspects in the choice of materials for such locations (e.g. winter period, Sabkha, proximity to River etc. ). References

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• ASSHD

M145-731 • AFPC Schedule B-cp/c-cp • Report EP 94-1 401

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Workover Location Construction Note:

As the workover location construction requirements may vary considerably from well to well due to the nature of work over or size of rig, a well specific requirement note will be initiated by the Drilling Supervisor. This request will include a drawing with minimum dimensions for the platform, the zero - zero area and the waste pit size (see Figure (4.vii)). Levelling, Clearing and Stripping These activities are to be executed as per specifications indicated on the work over location construction request and up to the standards as indicated in Drilling Location Construction, Clearing and Stripping and Levelling. Cellar The cellar is to be emptied and checked for cracks or damage. Damaged or collapsed cellars are to be repaired as per specifications (see Drilling Location Construction, Cellar).

Pits Pits are to be excavated as per Drilling Supervisor instruction, (see Figure 4.vii). Note:

The waste pit has always to be accessible for vacuum trucks.

Roads Access roads are to be surveyed and restored to the original condition. Camp Location The camp location is to be constructed as per Drilling Location Construction, Camp Area. Note that the need for a septic and trash pit will be requested on the notification fax to OCM as the work over rigs normally dig these pits themselves. Standards The standards as specified in Drilling Location Construction, Standards.

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Wellsite Restoration Note

• This scope covers the Civil Engineering aspects of the restoration of drilling and

work over locations of wells handed over to Production Department.

• When the well completion is finished, ODE/95 will raise a job order for the

restoration, and OCM should ensure that he has this job order before beginning work. The well site status at that time may be different from when it was handed over from ODE/5 to Production Department. OCM is requested to record and report any differences to ODE/95 (by observing actual well site status compared with status recorded in the handover form from ODE to Production Department).

• The instructions below apply to restoration after both initial completion and later

workovers.

• OCM should ensure, before any work on any location is carried out, that they are

fully informed of the circumstances of the respective Production Department asset (e.g. presence of LSA, high pressure in pipe lines or control lines, H2S, hot lines, underground cables or pipe lines, etc.). The Area Superintendent should be approached for the necessary Permit to Work.

• When site restoration is finished, OCM should formally hand back the location to

the Area Superintendent and should inform ODE/95 in writing that the restoration is finished.

Location Restoration in Desert Areas

Waste Pit • Recover mud and cuttings. • Spread all mud and cuttings evenly near or on the location. To accelerate the drying process the layer should be limited to 20 cm. Verify that cuttings are dried. • When the drying process is complete back fill the waste pit with the dried mud and cuttings. • Compact the waste materials every 50 cm, with a bulldozer. • Cover the dried mud with excess materials left from excavation operations. Note:

Ensure on completion that the waste pit blends in with the surrounding landscape and is dome-shaped to avoid forming of pools during the rainy seasons.

Flare Pit and VSP Pit • Heavy oil residue usually mixed with sand is to be recovered and dried with the recovered mud and cuttings. • Flare pit to be back filled with the original soil and blended with the surrounding landscape. • V.S.P. pit to be back filled in the same fashion as the Flare pit. Continued on next page

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Wellsite Restoration, Continued Location Restoration in Desert Areas, continued

Septic Pits The septic pits on both rig and camp site are to be closed with the original soil and blended with the surrounding landscape. Trash Pits • Collect all combustible material and rubbish from within a 200 m radius of the well head. • Burn the waste. • Back fill Trash Pits and compact the fill material. Platform / Location The drilling platform is to be graded, all bund walls created by previous excavation are to be levelled and blended with the surrounding landscape. As the camp site is considered part of the location, it must be restored to the same standard as the drilling platform.

Location Restoration in Agricultural Areas

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The programme for locations in agricultural or close to build up areas is the same as for the desert locations. In addition, the gravel used for the drilling platform has to be removed and replaced by agricultural soil.

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Pit Location / Dimension Drawing

38

80

2

Rig 3 5 11 19 28 65

41

38

Distance A 19 14.6 12.5 18 14 21

20 8

A 57

67

0-0 Area 114

4

30

20 7.5

1

10

3

10

10

32

7 65

5 10

18

6 6

Access Road 45

35

38

6

Pit Pit No. Vol. m3 Septic 1 27 Trash 2 80 Cellar 3 33 Waste/Mud 4 4500 Cement 5 9 VSP 6 64 Flare 7 128

Figure (4.i) Pit Location/Dimensions

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Cellar Drawing Slot 0.20 x 0.20 for surface drain water

Conductor pipe 30' - 18' 0.6m Ground 1.5m

Drainage pipe 5" 1.5m 1.5m

2.5m

3.0m

3.6m

2.5m

2.75m

A

0.3m

A 0.2m

4.6m

Concrete around the conductor 6.0m

Sump for cellar pump 0.30 x 0.30 x 0.15

A-A Both sumps are connected

Figure (4.ii) Cellar Drawing

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Waste Pit

20 m

30 m

30 m

Volume 4500 m

3

50 m

5m

Figure (4.iii) Cross Section of Waste Pit

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Road Cross Section

5.5 m 3.5 m

3.5 m

Slope

0.25 m

0.7 m

0.3 m

Figure (4.iv) Road Cross Section

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Cross Section at Culvert

Gravel Materials Road Surface Min Layer 30 Max Layer 15 Max Layer 15

Dia Varies

Sub-Base (Graded-Watered-Compacted)

Figure (4.v) Cross Section at Culvert

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Camp Site 12 m

32 m

Septic Pit 3x3x3m

N

Trash Pit 10 x 4 x 3 m

50 m

80 m

10 m

Carvan Area

40 m

Figure (4.vi) Camp Site

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Location Dimensions Drawing

20 m

Waste Pit 10m x 20m x2m 40 m 20 m

60 m

40 m 10 m

90 m

40 m This area need to be compacted and level especially around the cellar

This area to be graded and rolled

50 m

Zero-Zero area 1m around the cellar and same level a cement of cellar

100 m

Figure (4.vii) Location Dimensions

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