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Beckwith Creek Oil Development Project
Three Trees ProspectsCalcasieu Parish, LA
Hackberry Sand Map, by Larry D. Gerken
HACKBERRY EMBAYMENT
Introduction:
The Beckwith Creek Oil Development Project is located in Calcasieu Parish, LA, in the heart of the non‐ pressured, oil‐rich Hackberry Embayment, which extends from Southeast Texas to Southwest Louisiana. Enormous cums made the Hackberry Formation an exciting play early on, but the incredible complexity made the play very difficult to drill prior to 3D seismic. It was often remarked that the worst thing you could do in the Hackberry was make a well because you’ll go broke trying to offset it. 3D seismic changed all that by revealing the complex structures as well as delineate the reservoirs directly through Direct Hydrocarbon Indicators (amplitude anomalies). Post 3D seismic, the success rate jumped tremendously.
BECKWITH CRK
JEFFERSON
ORANGE
CAMERON
CALCASIEU JEFFERSON DAVIS
BEAUREGARD`ALLEN`
TEXAS
LOUISIANA
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The “Hackberry Embayment” was created through complex geological processes. The Hackberry, Nonion Struma & Nodosaria age formations of the Middle Frio were initially laid down as fairly “blanket” shelf sands. During a subsequent low stand, the sediments became unstable causing the shelf to collapse (1). The Middle Frio slumped off the shelf along decollement faults in the underlying Vicksburg into a jumble of rotated, graben, and horst blocks. Erosion continued for some time, causing “rounding off” at the high edges of some fault blocks and some fill in the low areas (2). Then, during a subsequent highstand the embayment was filled with the overlying Hackberry Shale (3), which provides an excellent seal for hydrocarbons (4).
3.
Hackberry Shale
4.
Hackberry Shale
Erosion
Erosion
Fill
3
Nearby Hackberry fields within 3 miles include Beckwith Creek and Southeast Lunita, which have numerous single well reservoirs with oil cums from 150 MBO to 2.2 MMBO. Reservoirs occur both at the interface of the sands with the unconformity as well as in structural traps (anticlines & fault traps) below the unconformity. Trap types include angular unconformity traps, horst blocks (which may or may not involve the unconformity), sub‐unconformity traps such as fault traps and anticlines, and an occasional stratigraphic trap.
These reservoirs are typically small in areal extent (5‐100 acres) but often have thick columns of hydrocarbons a very short distance from wet wells due to the often extreme dip of the Hackberry Sands, often over 25°, in the rotated blocks under the Hackberry unconformity. The thickness of the pays and excellent porosities allow excellent oil recoveries of over 500 BO/ACFT in many cases.
Angular unconformity traps consisting of thinly separated sands often have a gas cap in whichever sands intersect the unconformity structure at the highest position. Lower sands on the Unconformity tend to not have the gas cap. If completely separated, one would expect a small gas cap at the top of each reservoir. This leads to the conclusion that some migration of the gas along the unconformity surface has occurred over geologic time (millions of years), though the reservoirs act separately throughout the life of the production.
THREE TREESPROSPECT
TEX‐PACPROSPECT
Graphic of Hackberry Trap Types 4
Production Map & Data
The Hackberry/Ns/Nod Sands have produced 7.3 MMBO & 18.8 BCFG in the area of the Beckwith Oil Development Project. To the northeast near the project, oil reservoirs dominate. To the southwest, gas reservoirs are more dominant.
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WARNOCK
GRIGGS/LWR. GRIGGS
TEMPLE 7
TEMPLE 5
HACKBERRY 3
NONION STRUMA 1
NONION STRUMA 2
NODOSARIA BLANPIEI
HACKBERRY TYPE LOGHackberry Production by SandEvery sand in the Middle Frio has been found productive somewhere in the area. The sands ranked by number of reservoirs is as follows: UPPER HACKBERRY
Hackberry 3 Sd. 9 reservoirs Warnock Sd. 8 reservoirsGriggs/Lwr. Griggs Sd. 7 reservoirsTemple 7 Sd. 3 reservoirsNonion Struma 2 Sd. 3 reservoirsNodosaria Sd. 3 reservoirsTemple 5 Sd. 2 reservoirs Nonion Struma 1 Sd. 2 reservoirsUpper Hackberry Sds. 2 reservoirs
VICKSBURG
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Three Trees ProspectExecutive Summary
Multiple Hackberry & Nonion Struma Sands as objectives
Non‐Pressured, Straight hole to 8200’
3D Seismically Controlled anticlinal structure below the Hackberry Unconformity with conforming amplitude anomalies.
Multiple E‐log shows in highest downdip well.
Location anticipated to be 35’ high to show well.
Excellent OIL production nearby.
Reserve Potential:Show in Area Avg Pay Thickness Recovery = Reserve
Primary Objectives: DHI Downdip Well (ac.) across Res. (ft.) (BO/acft) Potential (BO)
Temple 7/United Sd. Subtle 15.0 X 8.0 X 400 = 48,000H3 Stringer None E‐Log 18.4 X 2.0 X 225 = 8,280 Hackberry 3 Sd. Strong E‐Log 18.4 X 15.7 X 400 = 115,552Nonion Struma 2 Sd. Subtle E‐Log 22.4 X 12.4 X 400 = 111,104
Total 282,936
Secondary Objectives: These include the other sands that will be encountered on‐structure. Specifically these include the shallower Hackberry Sands that will terminate against the Unconformity including the Lower Griggs, which had an E‐Log/SWC show in the downdip well, and the Lower United Sand. Thedeeper Lower Hackberry 3 Sand and Nonion Struma 1 Sand are also secondary objectives.
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O:\John-Geology\Digital Logs-ARCHIVE\Calcasieu LA Wells\Three Trees & TexPac Prospects\Coonass Model (1).jpg
The Three Trees Prospect is located within a graben block of the Hackberry Embayment. The prospect is an anticline at the Hackberry & Nonion Struma sands below the unconformity. This setup can achieve stacked pays.
Production has already been established on the northwest flank of the anticline where the Hackberry angular unconformity terminates several of the younger Hackberry Sands, though they were not thick accumulations due to the geometry at those levels. The Neumin #1 Miller, an early post‐3D well not ideally located, encountered a single pay zone with a thin column of gas on oil in the thin upper member of the Griggs Sd. and produced 4,125 BO & 232,922 MCF. A larger, brighter amp corresponding to the thicker Lower Griggs Sd. lies immediately east of the Miller well. A second well MAY be drilled on the Three Trees Prospect targeting this thicker Lower Griggs Sd. which exhibits a seismic amplitude, subject to post‐drill mapping of the first Three Trees well.
On the north flank of the anticline, the Sun #1 Welsh, drilled in 1964, encountered 3 shows: at 7452’ in the 2nd lobe of the Lower Griggs Sd just below the unconformity; at 7682’ in the Hackberry 3 Sd.; and at 8047.5’ in the Nonion Struma 2 Sd. The lower two shows (Hackberry 3, Nonion Struma 2) are the primary objectives of the prospect. The Hackberry 3 also exhibits a high quality DHI on 3D seismic. The Welsh well is slightly high structurally to the Miller well. The proposed location should be 35’ high to the Welsh well, allowing for thick hydrocarbon accumulation at the show levels and potentially thick accumulations at other sands that are wet in the downdip Welsh well. The uppermost sand at the proposed location is anticipated to be the Temple 7 Sd. and is likely to be prospective.
Log from Sun #1 Welsh used for Three Trees proposed well
Hack 3 Sd
Lwr Hack 3 Sd
Nonion Struma 1 Sd
Nonion Struma 2 Sd
Lwr United/Temple 5 Sd
United/Temple 7 Sd
Lwr Griggs‐ Sd2nd lobe
Lwr Griggs‐ SdHackberry Unconformity
Hackberry Shale
8
Neumin #1 MillerThis more modern well, drilled in 1997, is slightly downdip and wet at the show levels in the nearby Sun #1 Welsh. It was productive from a younger Hackberry Sand that is eroded out of the Welsh well and is not an objective of the Three Trees Prospect. This log shows the porosity and resistivity of the wet sands.
Sun #1 WelshThis well, drilled in 1964, is the show well on the edge of the prospect. Several E‐log shows are present, including the primary objectives of the prospect. These are the Hackberry 3 Sd at 7682’ in the Welsh well which exhibits an excellent seismic amplitude anomaly that conforms to the top of the structure, the Hackberry 3 Stringer at 7655’, and the Nonion Struma 2 Sd at 8047½’ in the Welsh well. The upper show at 7454’ is the lower lobe of the Lower Griggs Sd. which is not anticipated to be encountered in the first well but an additional well MAY be drilled for the upper member of the sand pending post‐drill mapping.
Hackberry 3
Lower Hackberry 3
Nonion Struma 1
Nonion Struma 2
Amplified Short Normal(0‐2 OHMMS)
40” Ind. Res.(0‐10 OHMMS)
Short Normal‐AMP 16”(0 – 10 OHMMS)
Neumin #2 Temple Inland
Hackberry 3 Sand produced 2.2 MMBO & 1.1 BCFG to date – 100 ac amp on horst block (NPC #4 Temple Inland also in reservoir)
2.58 miles west of Three Trees Prospect
‐1500
‐1000
‐500
0
500
1000
‐
5,000
10,000
15,000
20,000
25,000
30,000
1/1/1996
7/2/1996
1/1/1997
7/2/1997
1/1/1998
7/2/1998
1/1/1999
7/3/1999
1/1/2000
7/2/2000
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7/3/2011
1/1/2012
7/2/2012
1/1/2013
7/2/2013
OIL PROD(BBL)
GAS PROD(MCF)
GOR
Multiple Shows DowndipExcellent Porosity (30%+)
Added upper zone, Placed downhole choke over lower zone
Hackberry 3
“SHOW” DETAILS
Temple 5
Temple 7
Lwr. Griggs
Hackberry 3 Stringer
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Log from Sun #1 Welsh used for Three Trees proposed well
Nonion Struma 2 Sd
O:\John-Geology\Digital Logs-ARCHIVE\Calcasieu LA Wells\Three Trees & TexPac Prospects\Coonass Model (1).jpg
Hack 3 Sd
Lwr Hack 3 Sd
Nonion Struma 1 Sd
Nonion Struma 2 Sd
Lwr United/Temple 5 Sd
United/Temple 7 Sd
Lwr Griggs‐ Sd2nd lobe
Lwr Griggs‐ SdHackberry Unconformity
Hackberry Shale
Hackberry 3 Sd
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Nonion Struma 2 Sd
Hackberry 3 SdShale above Hackberry 3
12° WNW dip21.3’ of rise in 100’ of run
Hackberry Shale above Unconformity2° ESE dip
3.5’ of rise in 100’ of run
Neumin #1 MillerDiplog
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Surface, Roads, & Pipelines
Access to the wells will be along a 4 ½ mile road easement from the Campbell Group along their logging road off Camp Edgewood (Boy Scout) Rd. Zachry is also utilizing the road for their Phillips well. Aspect Mgmt. and possibly Duncan Oil are also utilizing the northern part of the road for producing wells.
Nearby, both Duncan and Zachry have gas gathering lines. Zachry and Duncan appear to be selling to Texas Eastern to the north through Aspect’s gathering system. The Zachry Goldsmith well appears to be selling to Tennessee Gas through the southern portion of the old Neumin #1 Miller flowline to the south.
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