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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The shallow coastal waters were bordered further north by an arid coastal plain characterized by extensive sabkhas.
Sandwiched between the also unconventional Cotton Valley, Bossier and Smackover formations, the Haynesville Shale is one of the most notable plays along the U. Production has boomed sincecreating a number of new millionaires in the Shreveport, Louisiana region. 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.
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. J, The Gulf of Mexico Basin. Oil and gas is currently produced from shelf-edge carbonate reservoirs which consist of oolite shoals within the Gilmer Limestone and Buckner Anhydrite members.
Jurassic basement blocks, Cretaceous thermal uplifts, and Cenozoic flexure. From Wikipedia, the free encyclopedia. Haynesville samples are from Louisiana and East Texas. Possibly, further alteration of silty, calcareous mudstones has resulted in the formation of the dolomitic mudstones and dolostones. Cairo field, Union County, Arkansas. Reported prepared under contract no.
The reported fossils include unidentified coccoliths, bivalves, gastropods, and calcispheres. 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.
Haynesville Shale-gas Study | Bureau of Economic Geology
As a result of rising gas prices and improved forrmation in hydraulic fracturing and directional drillingit became possible to extract the gas from the Haynesville Shale in an economic and cost-effective manner. Recently, Haynesville production of 5.
The southern rim of this ancient basin and hwynesville of the Haynesville Shale was an ancient Jurassic island, called “Sabine Island. The Haynesville Shale is an informal, popular name for a Jurassic Period rock formation that underlies large parts of southwestern Arkansasnorthwest Louisianaand East Texas.
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Very limited detailed descriptions of the Haynesville Shale indicated that it is fossiliferous. Basins colored in green; uplifts colored in red. 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 western edge of the basin in which the Haynesville Shale accumulated consisted of a broad north-south carbonate platform with prominent oolite shoals. 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.
That makes directional drilling and hydraulic fracturing popular avenues for tapping into its gas reserves.
As a result of these restrictive conditions, anoxic conditions frequently occurred during the deposition of the sediments that form the Haynesville Shale.
Department of Energy, Washington DC.
Shaded area represents productive Haynesville gas shale. The Haynesville Shale came into prominence in as a major producer of shale gas in East Texas and Louisiana. It was known to contain large quantities of natural gas prior to Retrieved from ” https: 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 the Haynesville Shale gas play on national and global energy picture. 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.
Both the silty, argillaceous mudstones and silty, calcareous mudstones often exhibit sparse to abundant, laminated pelletal fabrics. 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. However, prior to that time, it was uneconomic to extract the natural gas. In addition, the Gilmer Limestone member also represents a carbonate platform with oolite shoals that lie beneath central Upshur and western Smith counties, Texas.
The submarine fan sandstones of the Gray sand in north Louisiana are also significant producers. 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. 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.
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The composition of these mudstones varies greatly depending on position on geographic location and stratigraphic position. This sandstone is regarded as having accumulated as submarine fans carrying sediment from the coastline into the basin within which the Haynesville Shale accumulated.