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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Recently, Haynesville production of 5.

However, prior to that time, it was uneconomic to extract the natural gas. The southern rim of this ancient basin and extent of the Haynesville Shale was an ancient Jurassic island, called “Sabine Island. The northern edge of this basin consisted of shallow coastal waters floored by carbonate muds and oolite shoals lying just north of the modern Louisiana – Arkansas border.

As a result of rising gas prices and improved technology in hydraulic fracturing and directional drillingit became possible to extract the gas from the Haynesville Shale in an economic and cost-effective manner. From Wikipedia, the free encyclopedia.

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.

Inthe Haynesville Shale was thought to be the largest natural gas field in the contiguous 48 states with an estimated trillion cubic feet 7.

They vary from calcareous mudstone near the carbonate platforms and islands to argillaceous mudstone in areas where submarine fans prograded into the basin and diluted organic matter. The mudstone comprising it accumulated as a widespread and laterally continuous blanket across the limits of this restricted basin.

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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.

Gulf Coast Association of Geological Societies. 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 geologyy Fig.

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 geollogy Bossier.

News and Current Events. That makes directional drilling and hydraulic fracturing popular avenues for tapping into its gas reserves. In addition, the Gilmer Limestone member also represents a carbonate platform with oolite shoals that lie beneath central Upshur and western Smith counties, Texas. This page was last edited on 7 Septemberat The Haynesville Formation consists of marine and coastal plain limestone, shale, mudstone, and sandstone.

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Haynesville Shale

Shaded area represents productive Haynesville gas shale. 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 geloogy 7 Bcf per well of each formation, and play resources estimated together in the hundreds of trillions of cubic feet.

Where organic matter is low and silts are rare, the calcareous microfossil and carbonate mud has recrystallized. Haynesville samples are from Louisiana and East Texas. 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.

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The reported fossils include unidentified coccoliths, bivalves, gastropods, and calcispheres. A documentary film entitled “Haynesville: The Haynesville Shale is an informal, popular name for a Jurassic Period rock formation that underlies large parts of southwestern Arkansasnorthwest Louisianaand East Texas.

Study area and structural controls of the Upper Jurassic northeastern Gulf of Mexico basin. Cairo field, Union County, Arkansas. Organic-rich Bossier unlaminated mudstone facies showing fillibranch mollusks and silt-sized siliceous and calcareous grains. The Haynesville Shale was deposited in a restricted basin that was located on a southward sloping continental shelf covered by relatively shallow water.

Retrieved from ” https: In January the formation produced 6. Anoxic bottom water conditions allowed organic matter falling to the floor of this basin to be preserved and incorporated into sediments that became the Haynesville Shale. Jurassic basement blocks, Cretaceous thermal uplifts, and Cenozoic flexure.

The other members of the Haynesville Formation are also the source of oil and gas production. This veology island now lies deeply buried beneath the surface of Sabine County, Texas. Aalenian Bajocian Bathonian Callovian.

The composition of these mudstones varies greatly depending on position on geographic location and stratigraphic position.

Haynesville Shale – Wikipedia

The calcareous particles include coccolithsbivalveand gastropod fragments, and calcispheres. Oil and gas is currently produced from shelf-edge carbonate reservoirs which consist of oolite shoals within the Gilmer Limestone and Buckner Anhydrite members. Reported prepared under contract no.

The New York Times.