Presentation on theme: "Railroad Commission of Texas SWR 36: HYDROGEN SULFIDE (H2S) Travis Baer, EIT Engineering Specialist San Antonio District Office - Oil and Gas Division."— Presentation transcript:
1 Railroad Commission of Texas SWR 36: HYDROGEN SULFIDE (H2S) Travis Baer, EIT Engineering Specialist San Antonio District Office - Oil and Gas Division
2 Oil, Gas, or Geothermal Resource Operation in Hydrogen Sulfide Areas Statewide Rule 36Texas Administrative Code (TAC)Title 16, Part 1, Chapter 3§3.36Oil, Gas, or Geothermal Resource Operation in Hydrogen Sulfide Areas
3 Statewide Rule 36 Introduction Designed to protect public from hazards of hydrogen sulfide gas (H2S)Education and training are the best defensesIndustry must protect themselves, publicDenver City H2S tragedy, Sept. 2010
4 WHY STATE WIDE RULE 36 EXISTS TODAY Denver City remembers H2S tragedyPosted: September 15, :27amAVALANCHE-JOURNALDENVER CITY — Thirty-five years ago on the morning of Feb. 2, 1975, a city of about 4,100 people awoke to the biggest oil field-related tragedy it had ever experienced.A very small leak of hydrogen sulfide (H2S) — a poisonous, pungent gas — took the lives of nine people when an experimental gas injection-well pipe connection ruptured.
5 Outline General Provisions and compliance Radius of Exposure (ROE) and levels of complianceOperational requirements in H2S areasH-9 form and other legal matters
6 Statewide Rule 36 Compliance requirements Exploration, production and transportation of hydrocarbon fluids that contain hydrogen sulfide gas100 ppm or greater concentrationExceptions:gathering, storing and transporting stabilized liquid hydrocarbonsrefining, petrochemical and chemical plantsoperations where concentration of H2S is less than 100 ppm
7 Statewide Rule 36 General Provisions Testing to determine H2S concentration in operation/systemcolorimetric tubesTutweiler (titration method)gas chromatograph (gas analyzer utilized by gatherer)
8 Statewide Rule 36 General Provisions Done at random sites/wells Must be performed onsiteMay include:well tubing or casingportable well testertreater or other vessel with fluid/gasgas sales meterproduction tank
9 Statewide Rule 36 Form H-9 Certificate of Compliance required: H2S concentration is 100 ppm or greater in system/operationProducing/injection in designated H2S fieldDrilling into known H2S field near a public areaDrilling into a wildcat field (H2S)NOTE: A field is designated as sour when an operator files a Production H-9 indicating 100 ppm or greater H2S concentration.
10 Statewide Rule 36 Radius of Exposure (ROE) SWR 36 identifies two ROEs that identify potential danger, may require additional compliance.100 ppm ROE – distance from release to where H2S concentration in air will dilute to 100 ppm.100 ppm radius of exposure: x = [(1.589) (mole fraction H2 S)(Q)] to the power of (.6258)*Identifies public areas within the ROE*Where x = radius of exposure in feet; Q = maximum volume determined to be available for escape in cubic feet per day; H 2 S = mole fraction of hydrogen sulfide in the gaseous mixture available for escape
11 Statewide Rule 36 Radius of Exposure (ROE) 500 ppm ROE – distance from release to where H2S concentration in air will dilute to 500 ppm500 ppm radius of exposure: x = [(0.4546) (mole fraction H2 S)(Q)] to the power of (.6258)*Identifies public roads within the ROEpublic roads are tax supported or any road used for public access/use*Where x = radius of exposure in feet; Q = maximum volume determined to be available for escape in cubic feet per day; H 2 S = mole fraction of hydrogen sulfide in the gaseous mixture available for escape
12 Compliance Requirements Based on ROE Case 1: 100 ppm ROEis < 50’Case 2: 100 ppm ROE ≥ 50’ but < 3,000’& No Public AreaCase 3:100 ppm ROE ≥ 50’ & Public Area; or500 ppm ROE contains Public Road; or100 ppm ROE ≥ 3,000’
13 Warning & Marker Provision All new signs shall state“Caution” and “Poison Gas” with yellow and black contrast
14 Statewide Rule 36 Warning & marker provision Signs must be of sufficient sizeSigns must be posted:at well or facility within city limits or close proximity to publicat public road crossingsalong a line when located within public areaalong a road at frequent intervals to avoid accidental excavation
16 Statewide Rule 36 Security Facilities shall be fenced and locked when located within ¼ mile of a public areaFencing within city limits/close proximity to public shall be chain link, locked, deterrentSpecific fencing requirements required on case-by-case basisDistrict Office makes this determination
17 Statewide Rule 36 Materials & Equipment Manufactured to satisfy NACE MR and API RP-14E requirementsMaterials not susceptible to H2S stress cracking may be usedfiberglass, plasticswhen used for applicable industry standard, specifications or recommended practicesOther materials may be usedCommission must approve case-by-case
18 Statewide Rule 36 Materials & Equipment Existing facilities shall be in compliance providing there has been no H2S stress related failureRRC shall be notified of a failure resulting from H2S stress crackingnotified in writingcompliance of system will be determined
19 Statewide Rule 36 Control and safety equipment Operators subject to this provision include:100 ppm ROE is in excess of 50 ft., includes any public area500 ppm ROE is greater than 50 ft., includes any public road100 ppm ROE is 3,000 ft. or greaterOperators subject to this provision shall:install and maintain devices and safety procedures to prevent the undetected release of H2S gas
20 Statewide Rule 36 Contingency plan Plan of action for alerting, responding and protecting the public following release of potentially hazardous volume of H2S gasRequired for any operations where:100 ppm ROE is in excess of 50 ft., includes any public area500 ppm ROE is greater than 50 ft., includes any public road100 ppm ROE is 3,000 ft. or greater
21 Statewide Rule 36 Contingency plan Instructions/procedures for alerting public/safety personnel of emergencyProcedures for requesting assistance to remove publicCall listsupervisory personnel, sheriff, DPS, ambulance, fire department, doctors, RRC District Office, etc.
22 Statewide Rule 36 Contingency plan* Plat detailing area of exposure Names & telephone numbers of responsible partiesProvisions for advance briefing of the publicRRC District Office phone number*Refer to SWR 36 “Contingency Plan Provisions”for a complete list of requirements.
23 Statewide Rule 36 Training Operations with 100 ppm or greater H2S shall train employees working in potentially affected areas in H2S safetyOperators shall require service companies in H2S affected areas to utilize only personnel trained in H2S safety
24 Statewide Rule 36 Training Training shall include: hazards and characteristics of H2S safety precautionsoperations of safety and life support equipmentAdditional training for on-site supervisory personnel:effects of H2S on metal componentscorrective action and shutdown proceduresfull knowledge of contingency plan
25 Statewide Rule 36 Accident notification Operator is responsible for notifying RRC District Office:accidental release of H2S gas that may present a hazardactivation of contingency planincident/accident involving H2S gasA written report shall be furnished to the RRC District Office within 10 days of these conditions.
26 Statewide Rule 36 Drilling and workover provisions Wildcat drilling Infield drilling and workoversDrilling into known H2S zoneWildcat drillingDrilling or workover operations where:100 ppm ROE is in excess of 50 ft., includes any public area500 ppm ROE is greater than 50 ft., includes any public road
27 Statewide Rule 36 Infield drilling and workovers Requirements for drilling or workovers on leases with Production Form H-9 filed:protective breathing equipment (SCBA)maintained at two or more locationswind indicators and H2S signs on siteautomatic H2S sensors/alarmspersonnel trained in H2S and safety equipment
28 Statewide Rule 36 Infield drilling and workovers Minimum compliance depth for drilling: 1,000 feet above known H2S zoneCompliance for workovers is when a rig moves in to rig up
29 Statewide Rule 36 Drilling into known H2S zone File Form H-9 with District Officeat least 30 days prior to drillingwaiver may be requested in writing to DOProtective breathing equipment (SCBA) shall be maintained at two or more locations
30 Statewide Rule 36 Drilling into known H2S zone Visible wind indicators H2S signs posted at entranceAutomatic, audible H2S sensors/alarmsPersonnel trained in H2S and safety equipmentCompliance depth for drilling: 1,000 ft. above known H2S zone
31 Statewide Rule 36 Wildcat drilling “Wildcat” designation may require operator to comply if District Office determines conditions warrant compliance.Call District Office for specific requirementsRequirements vary by District Office.
32 Statewide Rule 36 Wildcat drilling “Full compliance” requires: infield drilling and workover requirementssufficient breathing equipmentminimum 3 audible H2S sensorsmethod of igniting gas in event of emergencychoke manifold, mud-gas separator, flare line and method for lighting the flare
33 Statewide Rule 36 Wildcat drilling “Full compliance” requires: secondary remote control of blowout prevention and choke equipment located a safe distance from wellDrill Stem Test of H2S zoneduring daylight hoursRRC DO notified before testBOP and well control systems pressure testedat or near compliance depthRRC DO notified 4 hours prior
34 Statewide Rule 36 Drilling or workover operations When 100 ppm ROE includes public area or 500 ROE includes a road:call RRC District Officefile Form H-9 for Drilling with the RRC DO 30 days priorfile Contingency Plan with RRC DOFull compliance/same requirements as Wildcat drilling
35 Statewide Rule 36 Injection of H2S Gas Injection of fluids containing H2S is not allowed unless:approved by Commission after public hearingapproved by District OfficeContingency plan and control and safety equipment requiredInjection of sour produced water is not H2S injection
36 Statewide Rule 36 Form H-9 Certificate of Compliance Certified operator has or will comply with the provisionsH-9’s are not transferable, each operator must test each lease/gas well or system and file H-9file in triplicate with the District Officefile 30 days prior to commencement of drilling;file within 30 days after P-4 certificate of transfer;New/amended H-9 filed if change in public exposureSigned by a person trained, experienced and qualified to make the certification
37 Statewide Rule 36 Completion report required Shall report on the initial completion report for oil well and gas well gas the H2S concentration when completed either in a designated H2S field or the H2S is 100 ppm or greaterShall file a Drilling Form H-9 or provide a copy of a certified copy of a Production Form H-9 when submitting a drilling application that requires one to be filed
38 RRC District Office H2S Coordinators San Antonio (01/02), Wesley Dresch (SW-S) (210)Houston (03), VACANT (713)Corpus Christi (04), Rick Silguero (361)Kilgore (05/06), Ronny Russell (903)Abilene (7B), Sam Birdwell (SW-N) (325)San Angelo (7C), Bill Spraggins (325)Midland (08/8A), Tom Fouts (432)Wichita Falls (09), Kim Peterson (940)Pampa (10), Alan Leach (806)
39 Additional Information H2S Information on Our Website:H2S Field Data:Hydrogen Sulfide Safety Manual:
40 Ramon Fernandez, Jr., P.E. Travis Baer Oil & Gas Division Deputy DirectorPhone: (512)Travis BaerOil & Gas Division – San Antonio District OfficePhone: (210) (ext.23)