Ordovician Red River B": Horizontal Oil Play&amp;nbsp; in the Southern Williston Basin"

Montgomery, Scott L.

doi:10.1306/522b43bb-1727-11d7-8645000102c1865d

Cited by 7 publications

(1 citation statement)

References 11 publications

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“…Marine carbonate rocks have always been a crucial area of exploration for oil and gas due to their wide distribution and significant thickness, which allows for the dominant generation of gas in marine strata. These rocks play a vital role in global oil and gas development, therefore, marine carbonate rocks are essential in the search for new sources of hydrocarbons (Dravis and Muir, 1993; Montgomery, 1997; Peters et al, 1997; Schwangler et al, 2020). Exploration and exploitation activities in marine carbonate reservoirs in the Sichuan Basin, Tarim Basin, and Ordos Basin have spanned several years, leading to the discovery of a large number of significant oil and gas pools of various sizes.…”

Section: Introductionmentioning

confidence: 99%

The geochemical differences and origin of multilayered natural gases in marine strata, the northwestern Sichuan Basin, China

Guo,

Hu,

Tian

et al. 2023

Energy Exploration & Exploitation

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The gas-source correlation of highly mature natural gas in marine strata has always been a contentious issue due to the complexities of the petroleum systems, which involve multiple source-reservoir-cap assemblages. To shed light on this matter, a study was conducted using data from five typical gas fields and two hot exploration blocks in the northwestern Sichuan Basin. Thirty-seven samples from marine strata were collected, and their natural gas molecular compositions and stable carbon isotopes were examined to investigate the gas genetic types and origins. Based on detailed gas geochemistry information, combined with source rocks and reservoir characteristics, hydrocarbon accumulation history, and tectonic evolution, the formation of natural gas was studied. The results suggest that the natural gases in the area are dominated by hydrocarbon gases with extremely high dryness coefficients and a trace of CO2 and N2. These natural gases can be separated into three groups based on the development of structures and different source rocks, according to the identification of the gas-source correlation. The presence of oil cracking gas in natural gas increases with the amount of fracture development in the gas-bearing area and the amount of input from sapropelic organic matter in the Qiongzhusi Formation (Fm). Conversely, the contribution from mixing sapropelic-humic organic matter in the Middle-Upper Permian increases noticeably. The different geochemical characteristics of natural gas in the northwestern Sichuan Basin are the result of three-factor coupling, involving different source rocks, diversified fracture evolution, and various secondary alterations (thermochemical sulfate reduction alteration, thermal maturity effect, and mixing of gas). The development of fracture determines the contribution proportion of different source rocks, while secondary alteration further transforms the geochemical characteristics of natural gas.

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Section: Introductionmentioning

confidence: 99%

The geochemical differences and origin of multilayered natural gases in marine strata, the northwestern Sichuan Basin, China

Guo,

Hu,

Tian

et al. 2023

Energy Exploration & Exploitation

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Williston Basin Pre-Bakken Potential Using Regional Maturity Modeling

Zimbrick

Dolan

2013

Unconventional Resources Technology Conference, Denver, Colorado, 12-14 August 2013

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Regional maturity modeling is a powerful tool to high grade areas of interest for unconventional play exploration. Unconventional plays are generally considered to be in-situ which implies that the hydrocarbons do not migrate far from where they are generated. Even when migration does occur, the migration distance is generally less than that of corresponding conventional plays.Leigh Price of the USGS collected and analyzed an outstanding dataset for the Upper and Lower Bakken shales. These samples were analyzed for Rock-Eval t ™ pyrolysis. Our Williston regional maturity model is calibrated to the Bakken using these data. Pre-Bakken maturity calibration data is sparse so maturity modeling is used to predict maturity in these potential source rock intervals.Regional maturity modeling requires structure maps, a Tertiary erosion map and temperature gradient maps. The temperature gradient map from uncorrected well bottomhole temperatures is modified to calibrate to the Bakken vitrinite reflectance equivalence (VRE) calculated from the pyrolysis Tmax measurement. When a satisfactory calibration is made for the Bakken then other horizons can be modeled for maturity. A predicted VRE map for each horizon of interest is produced from the 3D maturity model. Where pre-Bakken maturity calibration data is available this is compared to the modeled VRE values to verify the veracity of the model. The modeled horizon which corresponds to a known or inferred source rock is a potential unconventional play target. For example, if oil is the preferred target then the oil mature area can be studied in more detail. This may save financial and human resources by focusing efforts on areas of most interest.

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Permian (Wolfcampian) Admire C": New Exploratory Potential in the Northern Denver Basin"

Montgomery¹

1998

Bulletin

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Ordovician Red River B": Horizontal Oil Play  in the Southern Williston Basin"

Cited by 7 publications

References 11 publications

The geochemical differences and origin of multilayered natural gases in marine strata, the northwestern Sichuan Basin, China

The geochemical differences and origin of multilayered natural gases in marine strata, the northwestern Sichuan Basin, China

Williston Basin Pre-Bakken Potential Using Regional Maturity Modeling

Permian (Wolfcampian) Admire C": New Exploratory Potential in the Northern Denver Basin"

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