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2 wells, subsea datum

West to east, 0.7 miles end to end. Depths are elevation minus measured depth, so tops line up regardless of surface terrain; a value above zero sits above sea level. Each formation filed in more than one well has its own color, joined between neighboring wells and shaded down to the next formation both filed; nothing is interpolated. Where tops come from →

ASimpson #13 tops×BSimpson #15 tops×
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-0-1,000-2,000-3,000-4,000SUBSEA FTA1,362 FT ELB1,226 FT EL

shaded: a formation down to the next one filed in both wellsfiled in one well onlyhover a top or a name to pick out one formation

Tops by well

Subsea feet, with measured depth beneath; a dash where the well has no top filed for the formation.

FormationASimpsonBSimpson
Bryson-1,720MD 3,082—
Strawn-2,816MD 4,178—
Caddo-3,164MD 4,526—
Conglomerate—-3,667MD 4,893
Marble Falls—-3,771MD 4,997
Barnett Shale—-4,153MD 5,379
Lower Barnett Shale—-4,154MD 5,380
Ellenburger—-4,368MD 5,594

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Only wells with a location on file can be found by distance; a well with tops but no location can still be added by name or API number.

The tops, as filed

ASimpson #1 42-237-40544

Atoka Operating, Inc. · Jack · 1,362 ft elevation · 9,000 ft TD

FormationMD ftSubsea
Bryson3,082-1,720
Strawn4,178-2,816
Caddo4,526-3,164

BSimpson #1 42-237-39636

Oakridge Oil and Gas, LP · Jack · 1,226 ft elevation · 6,500 ft TD

FormationMD ftSubsea
Conglomerate4,893-3,667
Marble Falls4,997-3,771
BarnettBARNETT SHALE5,379-4,153
BarnettLOWER BARNETT SHALE5,380-4,154
EllenburgerELLENBERGER5,594-4,368

About this data

Formation tops and elevations from the RRC dbf900 wellbore file (completion filings), names normalized to the formations registry; well identity from the permit record, location from the shared well record. Subsea is elevation minus measured depth. Nothing between filed tops is estimated.

New to these records? completion reports and the wellbore file

Developers: this page as JSON is GET /v1/data/cross-section, documented in the API reference.