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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Jurassic basement blocks, Cretaceous thermal uplifts, and Cenozoic flexure. The mudstone comprising it accumulated as a widespread and laterally continuous filrtype across the limits of this restricted basin. From Wikipedia, the free encyclopedia. Recently, Haynesville production of 5.

Frack Off Balcombe drilling protest —14 Romanian protests against filegype gas. Study area and structural controls of the Upper Jurassic northeastern Gulf of Mexico basin.

Haynesville and Bossier gas shales are distinctive on wireline logs—high gamma ray, low density, low neutron porosity, high sonic travel time, moderately high resistivity.

This sandstone is regarded as having accumulated as submarine fans carrying sediment from the coastline into the basin within which the Haynesville Shale accumulated.

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. Texas articles missing geocoordinate data All articles needing coordinates.

In addition to the Haynesville Shale, the Haynesville Formation contains two formal subdivisions, which geologists call members. This natural gas is known as ” shale gas ” because the wells produce from low permeability mudstones that are also the source for the natural gas.


In addition, the argillaceous matrix of such mudstones frequently contains numerous calcareous particles and stringers. Possibly, further alteration of silty, calcareous mudstones has resulted in the formation of the dolomitic mudstones and dolostones.

Sedimentological structures include burrowing, ripples, laminations, and current laminations related to turbidites Fig. By using this site, you agree to the Terms of Use and Privacy Policy. Not long after the land-leasing boom began innew mineral owners across northwest Louisiana and East Texas joined online forums and began sharing information with each other about the process of oil and gas leasing, leasing bonus payments and well production results.

The mudrocks contain a complex mineralogical framework of carbonate, quartz, and clay Fig. Where organic matter is low and silts are rare, the calcareous microfossil and carbonate mud has recrystallized. 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 mechanisms by which organic matter accumulated within these sediments consisted of a complex interplay of local carbonate generation, clastic vormation from outside sources, variable burial rates, and variable bottom water anoxia and euxinia.

A documentary film entitled “Haynesville: The other members of the Haynesville Formation are also the source of oil and gas production. Gulf Coast Association of Geological Societies. The silt often occurs as laminations within these mudstones.

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.

Northeast Marcellus Shale Utica Shale. Organic-rich Bossier unlaminated mudstone facies showing fillibranch mollusks and silt-sized siliceous and calcareous grains. 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.

For example, the Haynesville Shale has been observed to vary in composition from 25 to 35 percent clay and 5 to 30 percent calcite in samples recovered from one oil and gas well.


Haynesville Shale

However, prior to that time, it was uneconomic to forjation the natural gas. J, The Gulf of Mexico Basin. The Haynesville Formation consists of marine and coastal plain limestone, shale, mudstone, and sandstone.

Haynesville samples are from Louisiana and East Texas. The Filwtype Shale came into prominence in as a major producer of shale gas in East Texas and Louisiana. In these mudstones, the calcite occurs as silt-sized microfossil hash composed of fragmented fossils and carbonate mud. 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.

More recently, as ofthe Haynesville was estimated to have 75 trillion cubic feet of recoverable gas, second only to the Marcellus Formation in the US. Organic matter in the form of amorphous kerogen coats the argillaceous material.

In addition to its overall size, the Haynesville is known for its high porosities.

Haynesville Shale Overview – Maps – Geology – Counties

It was known to contain large quantities of natural gas prior to Both the silty, argillaceous mudstones and silty, calcareous mudstones often exhibit sparse to abundant, laminated pelletal fabrics. The calcareous particles include coccolithsbivalveand gastropod fragments, and calcispheres.

A third, informal member, which called the “Gray sandstone,” of the Haynesville Formation gormation with Haynesville Shale along its northern edge. They comprise the western boundary of the ancient shelf basin within which Haynesville Shale accumulated.

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