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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In January the formation produced 6. 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.

Both the silty, argillaceous mudstones and silty, calcareous mudstones often exhibit sparse to abundant, laminated pelletal fabrics.

Bioturbated calcareous mudstone showing abundant calcitic bioclasts in organic-rich matrix. Haynesville and Bossier depositional areas are characterized by different mudrock lithologies. Sedimentological structures include burrowing, ripples, laminations, and current laminations related to turbidites Fig.

Haynesville Shale – Wikipedia

Retrieved from ” https: The reported fossils include unidentified coccoliths, bivalves, gastropods, and calcispheres. 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.

Hettangian Sinemurian Pliensbachian Toarcian. The Haynesville Shale underlies an area of about 9, square miles and averages about to feet thick. Very limited detailed descriptions of the Haynesville Shale indicated that it rormation fossiliferous.


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

The submarine fan sandstones of the Gray sand in north Louisiana are also significant producers. In these mudstones, the calcite occurs as silt-sized microfossil hash composed of fragmented fossils and carbonate mud.

They comprise the western boundary of the ancient shelf basin within which Haynesville Shale accumulated. 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. 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.

As a result of these restrictive conditions, anoxic conditions frequently occurred during the deposition of the sediments that form the Haynesville Shale. Possibly, further alteration of silty, calcareous mudstones has resulted in the formation of the dolomitic mudstones and dolostones. 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.

It contains vast quantities of recoverable natural gas. Where organic matter is low and silts are rare, the calcareous microfossil and carbonate mud has recrystallized. 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. A Nation’s Hunt for an Energy Future” has been made on the subject of the mineral rights leasing “gold rush” and the potential impact of fileype Haynesville Shale gas play on national and global energy picture.

In addition to the Haynesville Shale, the Haynesville Formation contains two formal subdivisions, which geologists call members. 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 hatnesville formation, and play resources estimated together in the hundreds of trillions of cubic feet.


Shaded area represents productive Haynesville gas shale. Texas articles missing geocoordinate data All articles needing coordinates. From Wikipedia, the free encyclopedia.

The western edge of the basin in which the Haynesville Shale accumulated consisted of a broad north-south carbonate platform with prominent oolite shoals. However, prior to that time, it was uneconomic to extract the natural gas.

Haynesville Shale

The northern edge of this basin consisted of shallow coastal waters floored by haynesvilel muds foramtion oolite shoals lying just north of the modern Louisiana – Arkansas border. Haynesville burrowed mudstone facies showing carbonate and siliceous grains, peloids, and burrows filled with calcite B. 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.

Reported prepared under contract no. J, The Gulf of Mexico Basin.

The Haynesville Formation consists of marine and coastal plain limestone, shale, mudstone, and sandstone. 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.