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SAF-07 Wellsite Safety

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    KINGDOM OF S UDI R BI

    MINISTRY OF INTERIOR

    HIGH COMMISSION

    OR

    INDUSTRI L SECURITY

    S FETY ND FIRE PROTECTION DIRECTIVES

    OR

    INDUSTRI L F CILITIES

    SAF 07

    Wellsite Safety

    Issue Date I2I6 1431H 126 05 2010

    RESTRICTED

    All Rights reserved to HCIS Copying or distribution prohibited without written permission from HCIS

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    Kingdom of Saudi Arabia

    Ministry of Interior

    i \Y {:{ \ { ; ; : ~ l ~ { ~ \

    t - . / ~

    High Commission

    for

    Industrial Security

    Secretariat General

    SAF 07 Wellsite Safety

    Issue

    Date: 12 6 1431H 126 05 2010

    TABLE OF CONTENTS

    I Administration

    1 1 Scope

    1.2 Application

    3

    3

    1.3 Conflicts and Deviations 3

    2 Definitions 4

    3 References 7

    4 General Requirements 8

    4.1 Spacing - Occupied Buildings 8

    4.2 Rupture Exposure Radius 9

    4.3 Unoccupied Agricultural

    Developments 9

    4.4 Water and Gas Injection Wells 9

    4.5 Well Burn Pits 9

    4.6 Additional Safety

    Measures for Populated Areas

    4.7 Automatic Closure 12

    4.8 High-Pressure Gas Wells 12

    4.9 Wellhead Equipment 12

    4.10 Automated Safety Systems

    12

    4.11 Suspen ded

    We lIs 13

    4.12 Vehicle Barrier 13

    4.13 Fencing in Populated Areas 13

    4.14 Indication of Wind Direction 13

    4.15 Access to Wellsites 13

    Table I Minimum Spacing from

    Oil and Gas Wells 8

    Table 2 Minimum Spacing from

    Well Burn Pits 10

    Figure I - Example of Wellhead 14

    RESTRICTED

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    All

    Rights reserved

    to

    HCIS Copying

    or distribution prohibited

    without

    written permission from HCIS

    Page 2 of 14

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    Kingdom

    of

    Saudi Arabia

    Ministry

    ofInterior

    High Commission for Industrial Security

    Secretariat General

    SAF-07 Wellsite Safety

    1 Administration

    1 1 Scope

    I I ~ I

    Lr SU eW ,.,

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    This Directive provides the minImum requirements for companies and

    establishments that are subject to the supervision of the High Commission for

    Industrial Security HCIS), Ministry of Interior, for onshore wellsite layout,

    wellhead protection, access, and flow isolation for all wells including oil and gas

    production wells, hydrocarbon injection wells, observation wells, abandoned wells,

    suspended wells, and wellsite facilities located onshore. Water injection, disposal,

    and supply wells that are open to or pass through a geological zone and could

    produce hydrocarbons, are also covered by this directive.

    1 2 Application

    This Directive is applicable to all facilities, including new projects, the expansion

    of existing facilities, and upgrades. For application to existing facilities, the Owner

    shall assess his facilities against the requirements of these Directives and

    coordinate with the General Secretariat of the HCrS to comply with the security,

    safety, and fire protection requirements according to these Directives and add to or

    modifY the existing facilities as required. Where the General Secretariat

    of

    the

    HCIS has assessed deficiencies

    in

    existing facilities during a survey, comparing the

    current state of the facilities to the requirements of these Directives, those identified

    deficiencies shall be corrected by the Owner.

    1 3 Conflicts and Deviations

    Where implementation of a requirement is unsuitable or impractical, where other

    equivalent company or industry Standards and Codes are followed, or where any

    conflict exists between this Directive and other company standards and Codes, the

    deviations shall be resolved by the General Secretariat of the HCIS. Deviations

    lower than the requirements of this Directive shall be listed and submitted in a

    report

    of

    non-compliance, with justification and rationale for not following the

    requirement, and approval shall be received from the General Secretariat of the

    HCIS prior to implementation. The documents shall be retained by the company

    in

    its permanent engineering files.

    Issue Date:

    12 6I1431H 126 05 2010

    RESTRICTED

    All Rights reserved to HCIS. Copying or distribution prohibited

    without

    written pennission from HCIS

    Page 3 of 4

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    Kingdom of Saudi Arabia

    Ministry ofInterior

    High

    Commission for

    Industrial Security

    Secretariat General

    SAF-07 Wellsite Safety

    2.

    Definitions

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    Absolute Opeu Flow AOF): In general tenus, the rate of flow that would be

    produced by a gas well or oil well if the only back-pressure at the surface is

    atmospheric pressure, e.g. the complete unrestricted maximum produced fluid flow

    rate.

    API: American Petroleum Institute, Website: http://api-ec.apLorg/

    Blow-Out Preveuter BOP): A blowout preventer is a large valve that can seal off

    an oil or natural gas well during drilling operations.

    If

    a kick see definition below)

    is

    experienced, operators can close the valve t forestall a blowout and regain

    control of the wellbore.

    Choke: An adjustable pressure control valve that

    is

    used to control backpressure

    on the well. Controlling the backpressure adjusts the production rate of the well.

    Drilling Pad A compacted area ofmarl located at the well site. The drilling pad is

    required to be level for use by drilling and workover rigs.

    Fail-safe: Describes a device which,

    in

    the event of failure, it will respond in a

    way that will cause no hanu or minimize hanu to equipment or personnel.

    GOSP: A gas oil separation plant GOSP)

    is

    a plant area where water and gas are

    separated from the produced crude oil so that the oil

    is of

    suitable quality for

    shipping through a pipeline to an oil terminal or to a refinery. The gas is sent to gas

    plants for further processing.

    HCIS: High Commission for Industrial Security, Ministry ofInterior.

    High Pressure HP) Well: Wells where the shut in wellhead pressure

    is

    expected

    to exceed 20,700 kPll(gauge) 3000 psig).

    kV: Kilovolts 1000 volts)

    kPa: Kilopascals

    Listed: Equipment, materials, or services that meet an appropriate designated

    Standard or Code or that have been tested and found suitable for a specified

    purpose. FM and

    U

    are two internationally recognized organizations with listings

    of equipment, materials, and services.

    ssue

    Date:

    12I6/143 H 126 0512010

    RESTRICTED

    All

    Rights

    reserved to

    HCIS. Copying or distribution prohibited without written pennission from erS

    Page 4 of 14

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    Kingdom

    of

    Saudi Arabia

    Ministry

    of Interior

    High Commission for Industrial Security

    Secretariat General

    SAF-07

    Wellsite Safety

    ~ \ . . l J I ~ \ j

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    Kingdom

    o

    Saudi Arabia

    Ministry ofInterior

    High

    Commission for Industrial

    Security

    Secretariat General

    SAF-07

    Wellsite Safety

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    Ppm: Concentration o gas or vapor in air, e.g. concentration o hydrogen sulfide

    gas in air

    in

    parts o gas or vapor per million parts o air by volume at 25 degrees C

    and 1 atmosphere o pressure.

    Psig: A common unit o pressure in pounds per square inch gauge.

    Rupture Exposure Radius RER):

    1 For toxic effects, the rupture exposure radius refers to the horizontal distance

    from a leak source to a specified level o hydrogen sulfide (H,S)

    concentration in parts per million (ppm).

    2) For a flammable gas or vapor hazard, the rupture exposure radius refers to

    the horizontal distance from a leak source to the

    z

    lower flammable limit

    LFL).

    Shall: Indicates a mandatory requirement.

    Should: Indicates a recommendation or that which is advised but not required.

    Surface Safety Valve SSV):

    An automated spring-assisted fail-safe valve

    installed on a wellhead to automatically shut in flow during an abnormal condition

    such as high or low pressure

    o

    the flowline. The SSV can be the upper master

    valve, a wing valve (upstream o choke), or a production valve (downstream o the

    choke).

    Suspeusiou Procedure:

    Wireline or workover rig procedures for securing a

    standing well from production

    on

    a long-term basis.

    Subsurface Safety Valve SSSV): An automated valve installed below ground

    level in the tubing string o an oil or gas well. The SSSV is used to shut in flow

    during an abnormal condition. SSSVs, when required, are installed 60 meters or

    more below ground level per API RP 14B.

    Wellhead: The valve manifold directly at the top o the well bore. The wellhead

    consists o several specialized valves including the following (see Figure

    1 :

    a)

    Crowu Valve:

    Topmost valve o the wellhead. This valve

    is

    used for

    wire line and coil tubing access to the well.

    Issue Date:

    12 6 1431H 26105 2010

    RESTRICTED

    All Rights

    reserved to

    HCIS. Copying

    or

    distribution prohibited without

    written

    pennission from HCIS

    Page 6 o 14

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    Kingdom of Saudi Arabia

    Ministry of Interior

    High

    Commission

    for

    Industrial Security

    Secretariat

    General

    SAF 07 Wellsite Safety

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    Kingdom o Saudi Arabia

    Ministry ofInterior

    High

    Commission

    for

    Industrial

    Security

    Secretariat General

    SAF-07 Wellsite Safety

    4. General Requirements

    4.1

    Spacing - Occupied Buildings

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    4.1.1 Wellsites shall be located away from population such that no occupied building,

    compound, shopping complex, office building, major plant facility, factory, or

    similar occupied development, whether permanent or temporary, is within the

    well s 100 parts per miIlion hydrogen sulfide rupture exposure radius (ppm

    H2S

    RER) or

    y

    lower flammable limit (LFL) RER i well control is lost during driIling

    or well maintenance workovers.

    Exception: Facilities incidental to operating and producing the wells (such as

    collection pipelines, distribution headers, separation or storage facilities, test

    separators) may be within the

    100 ppm

    H2S

    RER

    o

    the well

    as

    required.

    4.1.2

    Spacing from a well shall be measured from the nearest fence or other land mark.

    4.1.3 For industrial, military, and other larger non-residential land claims, determine the

    spacing based on the nearest anticipated development within the confines o the

    fence during the anticipated period o driIling.

    Table Minimnm Spacing from Oil and Gas Wells

    Divided

    Railroads

    Major electrical distribution centers·

    buildings·, major facilities·

    flares and

    burn

    similar facilities·

    Issue Date: 12 6 1431H 126 0512010

    RESTRICTED

    450

    450

    450

    1000

    All

    Rights

    reserved to

    HCIS. Copying

    or

    distribution prohibited without written pennission from BeIS

    Page 8 o 14

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    Kingdom of Saudi Arabia

    Ministry ofinterior

    High Comm ission for

    Industrial Security

    Secretariat General

    SAF-07 WeJlsite Safety

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    ' I f the H,S RER is greater than the distance stated in this table, use the 100 ppm H,S RER for

    spacing, Section

    4 1

    shall be used for well spacing from occupied buildings, major facilities,

    hospitals and schools and similar occupied facilities.

    Use

    the minimum spacing table only if the 100

    ppm

    H,S

    RER is

    less

    4.2 Rupture Exposure Radius

    4.2.1 The basis for RER calculations shall include all hydrocarbon zones to be penetrated

    during drilling

    of

    the new well. Flow rates used for the calculation shall be absolute

    open flow (AOF)

    of

    the well while being drilled.

    4.2.2 RER calculations shall be done with best available computer models available for

    dispersion modeling of natural gas and oil releases in air.

    4.2.3 The RER calculations shall be done by personnel having experience with drilling

    and its potential hazards and having experience

    in

    computer dispersion modeling.

    All studies and resulting RERs shall be kept

    as

    part ofthe Owner s permanent well

    records.

    4.3 Unoccupied Agricultural Developments

    Unoccupied buildings and other structures of agricultural developments and

    unoccupied farms are allowed to be within the 100 parts per million (ppm) H

    2

    S

    RER but not within the

    Y

    LFL RER. The minimum spacing shall be

    no

    less than

    100m.

    4.4 Water and Gas Injection Wells

    4.4.1 Water gravity injector, power injector, and supply wells that penetrate hydrocarbon

    fonnations shall be located the same

    as

    hydrocarbon producing wells.

    4.4.2 Water injection and supply wells that

    do

    not penetrate hydrocarbon bearing

    fonuations shall have a basic 60 meters minimum spacing requirement from plant

    equipment, buildings, etc. Gas injection wells shall use the same location criteria

    as

    producing gas wells.

    4.5 Well Burn Pits

    Well burn pits shall be subject to the same spacing from population and major

    facilities

    as

    well spacing. Minimum spacing shall meet Table 2 below.

    Issue Date 12 6 1431H 126 05 2010

    RESTRICTED

    All Rights reserved to HCIS Copying

    or distribution

    prohibited without

    written pennission

    from

    HCIS

    Page 9

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    Kingdom

    o Saudi Arabia

    Ministry

    ofInterior

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    Kingdom

    of

    Saudi Arabia

    Ministry

    ofInterior

    High Commission for Industrial Security

    Secretariat General

    SAF 07

    Wellsite Safety

    4.6 Additional Safety Measures

    for

    Populated Areas

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    4.6.1 Wells

    in

    a populated area shall implement the following additional precautionary

    measures in addition to the normal drilling safety program during drilling of

    hydrocarbon zones or during well maintenance.

    4.6.2

    An emergency response plan shall be

    in

    place to meet SAF-20, Pre-Incident

    Planning and Management of Emergencies. The emergency response plan for all

    wellsite related operations

    in

    populated areas shall include identification

    of

    occupied buildings, compounds, shopping complexes, office buildings, manned

    plant facilities, factories, or similar occupied developments, whether permanent or

    temporary, within 5 kilometers

    of

    a drilling location. The wellsite Owner shall

    acquire the emergency contact phone numbers for each and create a protocol and

    means to communicate with public agencies, to summon offsite assistance, and, if

    need be, to warn the occupants

    of

    potentially impacted developments. Refer to

    SAF-20 for details.

    4.6.3 Rig-site

    H2S

    continuous gas detection monitoring systems, making certain the rig

    site and remote H2S monitoring systems are installed

    in

    adequate numbers and

    locations and that they work correctly and measure accurately

    (if

    H2S

    is in

    the

    formation being drilled). The gas detection systems shall be listed.

    4.6.4 Additional kill-weight drilling fluid mud) available near the drillsite for immediate

    use in an emergency.

    4.6.5 A Blow-Out Preventer BOP) stack with pipe rams or blind rams and shear rams

    with capability

    of

    cutting the drill pipe shall be in place and operational on the rig.

    4.6.6 On-site coverage 24 hours-a-day by on-site foremen with authority and the means

    for immediate ignition

    of

    the well without prior management approval

    in

    the event

    of

    loss

    of

    well control.

    4.6.7 Capability

    of

    safely incinerating natural gas and handling other fluids

    in

    a

    controlled way by using equipment designed for such service during a kick.

    4.6.8 Under no circumstances shall population or manned facilities be exposed to over 30

    parts per million H

    2

    S gas concentration for more than I hour.

    4.6.9 For existing wells in populated areas, the special precautions in Section 4.6 shall

    also be used for well maintenance workovers. Stimulation and wireline work

    on

    Issue

    Date: 12i6/1431H

    126 05 2010

    RESTRICTED

    AI Rights reserved to

    HCIS,

    Copying or distribution prohibited

    without

    written pennission from HCIS

    Pagellofl4

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    Kingdom o Saudi Arabia

    Ministry

    ofinterior

    High Commission for Industrial Security

    Secretariat General

    SAF 07

    Wellsite Safety

    ~ L U \ ; ; \ J

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    Kingdom o Saudi Arabia

    Ministry

    ofInterior

    High Commission for

    Industrial

    Security

    Secretariat General

    SAF 07 Wellsite afety

    4.11

    Suspended Wells

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    Suspended wells shall be suspended

    in

    accordance with established procedures

    documented by the Owner. Suspension procedures, equipment in the well and other

    related records shall be kept as part o the Owner s permanent well records.

    4.12 Vehicle Barrier

    All wellheads shall be protected with a barrier to prevent work vehicle impact.

    4.13 Fencing

    in

    Populated Areas

    Wellsites

    in

    populated areas shall be enclosed by a fence that meets Security

    Directive SEC-02, Security Fencing. For other producing related facilities, the

    Owners shall ensure that they provide an adequate level

    o

    security measures to

    protect their facilities by applying the requirements o

    SEC O

    I, Application o

    Security Directives, and other security directives issued by the HCIS.

    4.14 Indication o Wind Direction

    A wind sock pole shall be permanently installed at each hydrocarbon production or

    injection wellsite in populated areas.

    4.15 Access to Wellsites

    Two accessways shall be available to each wellsite. Each access shall be wide and

    high enough to allow unobstructed rig and heavy vehicle access and oriented 90 to

    270 degrees from each other.

    Issue Date: 12 6 1431H 12610512010

    RESTRICTED

    All

    Rights

    reserved to

    HCIS. Copying

    or

    distribution prohibited without written

    pennission from

    HCIS

    Page 13

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    Kingdom

    of

    Saudi Arabia

    Ministry ofinterior

    High Commission for Industrial Security

    Secretariat General

    SAF 07

    Wellsite Safety

    QUICK UNION TREE CAP

    SWAB OR CROWN

    VALVE _

    WING VALVE

    ::::::= F:::

    UPPER MASTER VALVE AS

    HYDR ULIC CTU TED SSV

    LOWER MASTER VALVE too

    Figure Example

    of Wellhead

    Issue Date:

    lUG 143m 126 05 2010

    RESTRICTED

    ~ L U \ ; ~ \ ) J

    JI 0 )U .,WI .. .'

    a WI

    ;;";L.) l

    ll Rights

    reserved to

    HeIs Copying

    or distribution

    prohibited without written permission from HClS

    Page

    14

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