Geologic analysis of the Upper Jurassic Cotton Valley Formation in Jefferson TOC) compared to the productive Haynesville Shale Formation (% TOC). Samples of Jurassic Haynesville Formation mudstone are examined with FIB- SEM and Sorry, there is no online preview for this file type. . properties of pore types and networks from a variety of geologic environments. Hydraulic Fracture Design and Well Production Results in the Eagle Ford Shale: . Modeling: A Worked Example From the Haynesville Shale, De Soto Parish.
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Frack Off Balcombe drilling protest —14 Romanian protests against shale gas.
The other members of the Haynesville Formation are also the source of oil and gas production. Where organic matter is low and silts are rare, the calcareous microfossil and carbonate mud has recrystallized. In many geological reports and journal papers, the Haynesville Shale was classified as part of the Bossier Shale, although they are now classified as separate formations. Both the silty, argillaceous mudstones and silty, calcareous mudstones often exhibit sparse to abundant, laminated pelletal fabrics.
The mudstone comprising it accumulated as a widespread and laterally continuous blanket across the limits of this restricted basin. That makes directional drilling and hydraulic fracturing popular avenues for tapping into its gas reserves. Hettangian Sinemurian Pliensbachian Toarcian. Bioturbated calcareous mudstone showing abundant calcitic bioclasts in organic-rich matrix.
In January the formation produced 6. Texas articles missing geocoordinate data All articles needing coordinates. The Gilmer Limestone and Buckner Anhydrite members represent coastal and shallow marine deposits, which form along the northern boundary of the basin in which the Haynesville Shale accumulated and separate it from contemporaneous undifferentiated nonmarine deposits that occur beneath Arkansas further north.
Geology The Upper Jurassic Kimmeridgian to Lower Tithonian Haynesville and Bossier Shales of East Texas and northwest Louisiana are currently one of the most important shale-gas plays in North America, having high IPs, steep decline rates, EURs estimated at 3 to 7 Bcf per well of each formation, and play resources estimated together in the hundreds of trillions of cubic feet. Very limited detailed descriptions of the Haynesville Shale indicated that it is fossiliferous. Northeast Marcellus Shale Utica Shale.
Ternary diagram showing Bossier and Haynesville mineralogical data from x-ray diffraction analyses.
Haynesviple field, Union County, Arkansas. The STARR team focuses on studies of Haynesville and Bossier Shale facies, deposition, geochemistry, petrophysics, production, pore evolution, and stratigraphy in light of paleogeographic setting and regional tectonics using wireline logs, seismic, and cores. Recently, Haynesville production of 5. The Haynesville Shale is an informal, popular name for a Jurassic Period rock formation that underlies large filrtype of southwestern Arkansasnorthwest Louisianaand East Texas.
They comprise the western boundary of the ancient shelf basin within which Haynesville Shale accumulated. The reported fossils include unidentified coccoliths, bivalves, gastropods, and calcispheres. Organic-rich Bossier unlaminated mudstone facies showing fillibranch mollusks and silt-sized siliceous and calcareous grains. This sandstone is regarded as having accumulated as submarine fans carrying sediment from the coastline into the basin within which the Haynesville Shale accumulated.
This natural gas is known as ” shale gas ” because the wells produce from low permeability mudstones that are also the fipetype for the natural gas.
Haynesville Shale-gas Study | Bureau of Economic Geology
Mudrocks range from calcareous-dominated facies near the carbonate platforms and islands to siliceous-dominated lithologies in areas where deltas prograded into the basin and diluted organic matter e. Inthe Haynesville Shale was thought to be the largest natural gas field in the contiguous 48 states with an estimated trillion cubic feet 7. Study area and structural controls of the Upper Haynesvklle northeastern Gulf of Mexico basin. As a result of these restrictive conditions, anoxic conditions frequently occurred during the deposition of the sediments that form the Haynesville Shale.
In addition, the Gilmer Limestone member also represents a carbonate platform with oolite shoals that lie beneath central Upshur and western Smith counties, Texas. Anoxic bottom water conditions allowed haynesgille matter falling to the floor of this basin to be preserved and incorporated into sediments that became the Haynesville Shale.
Sandwiched between the also unconventional Cotton Valley, Bossier and Smackover formations, the Haynesville Shale is one of the most notable plays along the U. They vary from calcareous mudstone near the carbonate platforms filetyps islands to argillaceous mudstone in areas where submarine fans prograded into the basin and diluted filetypr matter.
A third, informal member, which called the “Gray sandstone,” of the Haynesville Formation interfingers with Haynesville Shale along its northern edge.
However, prior to that time, it was uneconomic to extract the natural gas. Haynesville mudstones contain abundant carbonate, whereas Bossier mudstones are dominantly clay and quartz, indicating a shift from transgressive carbonate-dominated environment to progradation of clastics due to highstand deposition in the Bossier.
In addition, the argillaceous matrix of such mudstones frequently contains numerous calcareous particles and stringers. Aalenian Bajocian Bathonian Callovian. The Upper Jurassic Kimmeridgian to Lower Tithonian Haynesville and Bossier Shales of East Texas and northwest Louisiana are currently one of the most important shale-gas plays in North America, having high IPs, steep decline rates, EURs estimated at 3 to 7 Bcf per well of each formation, and play resources estimated together in the hundreds of trillions of cubic feet Fig.
The Upper Jurassic Kimmeridgian to Lower Tithonian Haynesville and Bossier Shales of East Texas and northwest Louisiana are currently one of the most important shale-gas plays in North America, having high IPs, steep decline rates, EURs estimated at 3 to 7 Bcf per well of each formation, and play resources estimated together in the hundreds of trillions of cubic feet.
Production has boomed sincecreating a number of new millionaires in the Shreveport, Louisiana region. Both stratigraphic relationships and a nannofossil coccolith assemblage described from it indicates that it is Kimmeridgianto million years old, in age. Bone Spring Play Analysis. The accumulation of pelleted, fossiliferous, organic-rich carbonate mud and even and wavy-lenticular laminated beds of very fine quartz silt and detrital clay reflects the mixed accumulation of carbonate sediments generated within this basin and clastic sediments that came from outside it.
The submarine fan sandstones of the Gray sand in north Louisiana are also significant producers. It contains vast quantities of recoverable natural gas. This page was last edited on 7 Septemberat Views Read Edit View history. Department of Energy, Washington DC. The Haynesville Shale is a lithological heterogeneous, often organic-rich, fprmation. J, The Gulf of Mexico Basin.
The carbonate platforms, their oolite shoals, the Sabine Island, and prehistoric Gulf of Mexico coastline created a restricted basin that marine currents could only readily access from the east. Porosity occurs in nano-pores as interparticle pores and within organics.
Basins colored in green; uplifts colored in red. Oil and gas is currently produced from shelf-edge carbonate reservoirs which consist of oolite shoals within the Gilmer Limestone and Buckner Anhydrite members.
In that well, the Haynesville Shale consists of silty, argillaceous mudstones, silty, calcareous mudstones, and dolomitic mudstones and dolostones. The shallow coastal waters were bordered further north by an arid coastal plain characterized by extensive sabkhas.