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Railroad Commission of Texas

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Railroad Commission of Texas Victor G. Carrillo - Chairman Elizabeth A. Jones Commissioner Michael L. Williams Commissioner Commercial Salt Water Disposal ... – PowerPoint PPT presentation

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Title: Railroad Commission of Texas


1
Railroad Commission of Texas
  • Victor G. Carrillo - Chairman
  • Elizabeth A. Jones Commissioner
  • Michael L. Williams Commissioner

2
Commercial Salt Water Disposal Well Permitting
  • Gil Bujano P.E. Assistant Director
  • Technical Permitting, Oil Gas Division

3
Regulatory Background
  • There are over 392,000 oil and gas industry wells
    in Texas
  • The first injection well in Texas was permitted
    in 1936
  • There are 100,270 injection and disposal wells
    on the books
  • There are 52,084 currently permitted injection
    and disposal wells as of 1/6/2010

4
Regulatory Background
  • The RRC administers the Class II UIC program in
    Texas under authority delegated by EPA
  • 20 of UIC funding comes from EPA
  • EPA oversight is ongoing to ensure that the RRC
    program is effective
  • RRC program must be equivalent to EPA, but not
    necessarily identical.

5
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6
Over 160 Commercial Disposal Wells in the General
Area
  • Clay 1
  • Comanche 1
  • Cooke 7
  • Denton 3
  • Erath 2
  • Grayson - 0
  • Hamilton 2
  • Hill 3
  • Hood - 16
  • Hamilton 1
  • Jack 15
  • Johnson 28
  • Montague 21
  • Palo Pinto 10
  • Parker 15
  • Somervell 5
  • Tarrant 4
  • Wise 31

7
Permitting Staff
  • 4 Engineer/Geologists review permit applications
  • 1 Engineer supervises workgroup
  • 1 Engineer supervises the Technical Permitting
    section and signs all permits

8
General Permitting Requirements
  • Base of Useable Quality Groundwater depth
  • Notice and Hearing Opportunity
  • Area of Review
  • Geologic Requirements
  • Surface Casing
  • Production Casing
  • Packer Requirements

9
BUQW
  • For new wells, surface casing must be set to the
    protection depth determined by the Texas
    Commission on Environmental Quality (TCEQ)
  • This is called the Base of Useable Quality Water
  • The surface casing is cemented to the surface.

10
Notice Hearing
  • surface owner
  • adjacent landowners (Commercial Disposal)
  • operators within ½ mile
  • city clerk if in city limits
  • published in general circulation paper
  • Protest affected person who has or will suffer
    actual injury or economic damages other than a
    member of the general publicincluding surface
    owners and adjoining offset operators

11
Area Of Review
  • Statewide rules require that an applicant for an
    injection or disposal well permit examine the
    data of record for wells that penetrate the
    proposed injection zone within a one quarter
    (1/4) mile radius of the proposed well
  • This is to determine if all abandoned wells have
    been plugged in a manner that will prevent the
    movement of fluids into strata other than the
    authorized injection or disposal zone.
  • A permit applicant must submit a map showing the
    location of all wells.

12
Geological Requirements
  • This part of the permit review verifies that the
    proposed injection zone is adequately isolated by
    relatively impermeable strata to confine injected
    fluids to the proposed zone.
  • The authorized injection or disposal strata must
    be isolated from overlying usable quality water
    by a sufficient thickness of relatively
    impermeable strata, which is generally considered
    to be an accumulative total of at least 250 feet
    of clay or shale.

13
Completion Requirements Three Layers of
Protection
  • 1st Layer Surface Casing
  • 2nd Layer Production casing
  • 3rd Layer Tubing and Packer

14
Surface Casing 1st layer of protection
  • SWR 13 applies to all RRC wells and requires that
    surface casing be set and cemented through the
    groundwater to protect it before drilling beyond
    that depth into deeper formations
  • Surface casing acts as a protective sleeve
    through which the deeper drilling occurs

15
Production Casing Completion Requirements 2nd
layer of protection
  • SWR 13 applies to all RRC wells
  • Requires production casing to be cemented
    with enough cement to fill 600 ft above shoe and
    any other productive intervals
  • SWR 9 applies to all RRC disposal wells
  • Specifically for injection wells

16
Production Casing Completion Requirements cont
  • After drilling (inside the surface casing) to the
    target formation, the production casing is set
    and cemented to isolate the target formation
  • SWR 9 Requires 400-600 ft. of cement at the top
    of the injection interval to ensure that injected
    fluids do not escape the permitted interval
  • By running bond logs, or temperature surveys to
    increase confidence in the effectiveness of the
    cement, less vertical cement may be permitted.

17
Tubing and Packer 3rd layer of protection
  • All newly drilled or converted disposal wells
    permitted under Rule 9 must be equipped with
    tubing set on a mechanical packer unless an
    exception is granted by the director for good
    cause. Pressure observation valves are required
    on the tubing and each annulus..
  • Tubing is slim pipe inserted into the center of
    the well bore inside the surface casing and
    production casing
  • A packer is a mechanical device that seals the
    open space (annulus) between the tubing and the
    packer
  • Disposal wells must have a packer set within 100
    feet of the permitted disposal interval

18
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19
Post-Permitting
  • Annual Monitoring reports must be filed on every
    injection/disposal well to report activity,
    status, and monitoring
  • 52,000 reports are received annualy and reviewed
    by staff and automated programs
  • Initial and periodic Mechanical Integrity Tests
    must be performed to check for leaks
  • RRC staff review 15,000 18,000 tests each year

20
Permitting of the Bosque Disposal Systems Sophia
3
  • The well application was filed under Statewide
    Rule 9 for disposal of oil and gas exploration
    and production (EP) waste into the interval
    between 8,700 and 12,750 feet below ground
    surface.
  • The well application is to dispose into the
    deeper Ellenburger formation, but would be
    carried in the shallower Barnet Shale for book
    keeping reasons.

21
Bosque Disposal Systems Sophia 3 Surface Casing
  • Deepest groundwater is at 1395 ft. at the well
    location
  • Rules require setting 1395 ft. of surface casing
  • Surface casing in the Sophia SWD well is to be
    set at 1,475 ft. and cemented back to ground
    surface

22
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24
Railroad Commission of Texas
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