Mudlogging trailer at Hendren Century Farms # 2 petroleum well (north of Johnstown, Ohio, USA) 5 : 無料・フリー素材/写真
Mudlogging trailer at Hendren Century Farms # 2 petroleum well (north of Johnstown, Ohio, USA) 5 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Mudlogging trailer at an actively drilling petroleum well in Licking County, Ohio, USA. (October 2016) (site access generously provided by Gary Sitler for geoscience education purposes)During the late 1800s, Ohio was the # 1 petroleum exporter on Earth. This is definitely not the case anymore! Despite this, Ohio today still has economic concentrations of oil and natural gas. Ohio has three significant petroleum occurrences:1) Trenton Limestone (upper Middle Ordovician) of northwestern Ohio. 2) Clinton Sandstone (Lower Silurian) of eastern Ohio. 3) Knox Group (Beekmantown Dolomite-Rose Run Sandstone-Copper Ridge/Trempealeau Dolomite) (Upper Cambrian to ?lowermost Ordovician) in the eastern ~half of Ohio. Of these three petroleum systems, the Knox Group generally requires the deepest drilling. Most Knox Group drilling in Ohio targets the Rose Run Sandstone, an interbedded quartzose sandstone-dolostone unit of Late Cambrian age.The active wellsite shown above (as of late October 2016) was targeting a paleotopographic high at the Knox Unconformity and hoping to encounter petroleum in porous dolostone. During this visit, the rig was drilling at a depth between 3,300 and 3,400 feet below the surface.During drilling, most wellsites have an onsite geologist, called a mudlogger. This photo shows equipment in a mudlogging trailer, which serves as a temporary home for the wellsite geologist. Some mudlogging companies work shifts (different geologists are here at different times of the day), while others do not (the geologist works and sleeps here continuously until the well is done). The geologist keeps track of the drilling rate and the stratigraphic unit being drilled, monitors how much natural gas is coming out of the well, examines and describes rock chip samples, and prepares a written log.The microscope is used to closely examine rock samples (which come out of the well as broken chips or finely-pulverized granules and dust). The enclosed metal box with the green viewing port has an interior ultraviolet (UV) black light and is used for examining petroleum content in rock samples - hydrocarbons glow under black light.Update: as of spring 2017, this well was making 100 to 125 MCF a day (= 100 to 125 thousand cubic feet of natural gas) and 10 barrels of oil per day. The producing horizon is in the Upper Cambrian Copper Ridge Dolomite (also known as the Trempealeau Dolomite). Petroleum is coming from porous dolostones below the Knox Unconformity. The Knox is a megasequence boundary (Sloss sequence boundary) that separates the Sauk Megasequence below from the Tippecanoe Megasequence above.The following are formation picks for this well (the numbers are from the completion record filed with the Ohio Division of Natural Resources, Division of Oil and Gas Resources):430 feet depth = top of the Berea Sandstone (lowermost Devonian)1182 feet depth = top of the "Big Lime" (= Devonian and Silurian carbonate succession, including the Delaware Limestone, Columbus Limestone, and Silurian dolostones)1940 feet depth = top of the "Packer Shell" (= Middle Silurian Dayton Formation equivalent)3252 feet depth = Trenton Limestone (upper Middle Ordovician, sensu traditio; lower Upper Ordovician, sensu novo)3790 feet depth = Gull River Limestone (Middle Ordovician)3830 feet depth = Knox Unconformity with Trempealeau Dolomite below (Upper Cambrian)According to State of Ohio records, this well has produced the following: 2017 - 38 barrels of oil, 12,660 MCF of natural gas (= thousands of cubic feet of natural gas), 516 barrels of brine (= salt water) 2018 - 59 barrels of oil, 2828 MCF of natural gas, 175 barrels of brine 2019 - 144 MCF of natural gas 2020 - 21 MCF of natural gas, 130 barrels of brine 2021 - no productionLocality: Hendren Century Farms # 2 well (permit # 34089261840000) (2026' SL, 1526' WL, Lot 10, 4th Quarter of Township), north of Johnstown, Hartford Township, northwestern Licking County, Ohio, USA----------------------See info. at:gis.ohiodnr.gov/MapViewer/WellSummaryCard.asp?api=3408926... |
| 撮影日 | 2016-10-30 09:14:06 |
| 撮影者 | James St. John |
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