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Tocito Sandstone

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Journal Article
Published: 30 April 2021
Journal of Sedimentary Research (2021) 91 (4): 415–432.
... to be derived by reworking of underlying sediment through transgressive erosion and show varying levels of detachment and reworking into discrete ridges and bars by wave and tidal processes as they become more evolved. The Late Cretaceous Tocito Sandstone in the Western Interior Seaway, which overlies...
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Series: SEPM Special Publication
Published: 01 January 1999
DOI: 10.2110/pec.99.64.0227
EISBN: 9781565761865
...Abstract Abstract A detailed and comprehensive study of all Tocito outcrops along the margins of the San Juan basin, New Mexico, combined with an equally comprehensive study of the subsurface Tocito by David Jennette and clive Jones oil-rich, shale-encased sand bodies. The Tocito Sandstone...
Series: AAPG Memoir
Published: 01 January 1995
DOI: 10.1306/M64594C11
EISBN: 9781629810850
...Abstract Abstract In the subsurface of the San Juan basin, New Mexico, the Coniacian Tocito Sandstone is composed of four high-frequency sequences. Basal sequence boundaries are marked by erosional truncation of underlying strata and have mappable axes of erosion which are typically narrow...
Series: AAPG Memoir
Published: 01 January 1995
DOI: 10.1306/M64594C12
EISBN: 9781629810850
...Abstract Abstract Recognition of depositional sequences in the Upper Cretaceous (of early to middle Coniacian age) Tocito Sandstone permits determination of genetic relationships of coeval shelf shoreface alluvial and carbonaceous strata. Stratal geometry, lithologic character, and facies...
Series: AAPG Special Publication
Published: 01 January 1991
DOI: 10.1306/SP548C6
EISBN: 9781629811161
...Abstract Abstract In the subsurface of the San Juan Basin, New Mexico, the Coniacian Tocito Sandstone is composed of four sequences (Tocito-1, Tocito-2, Tocito-3 and Tocito-4). Over their extent, each basal sequence boundary is marked by erosion and truncation of underlying strata and onlap...
Series: SEPM Short Course Notes
Published: 01 January 1985
DOI: 10.2110/scn.85.13.0559
EISBN: 9781565762428
...Abstract Abstract The Solar Petroleum Navajo F-151 (NW Sec. 10 T31N R17W), which is the subject of this discussion, is located in Horseshoe Field in the San Juan Basin in San Juan County, New Mexico (Fig. 1). It produces from the Tocito Sandstone Lentil of the Mancos Shale which has been...
Journal Article
Journal: AAPG Bulletin
Published: 01 March 1981
AAPG Bulletin (1981) 65 (3): 559.
...James E. Fassett ABSTRACT The Upper Cretaceous Tocito Sandstone Lentil of the Mancos Shale consists of a series of northwest-trending linear sandstone bodies in the San Juan basin of New Mexico. This sandstone unit, which has produced most of the basin’s crude oil (more than 125 million bbl to date...
Series: SEPM Short Course Notes
Published: 01 January 1985
DOI: 10.2110/scn.85.13.0403
EISBN: 9781565762428
...Abstract Abstract Five depositional models have been utilized during the last 30 years to explain the deposition of the Upper Cretaceous Gallup and Tocito Sandstone and Tocito Sandstone Lentil in the San Juan Basin in New Mexico. It has generally been recognized that most of the true Gallup...
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Generalized cross section showing the position of the <span class="search-highlight">Tocito</span> <span class="search-highlight">Sandstone</span> (Ss)...
Published: 01 September 2021
Figure 3. Generalized cross section showing the position of the Tocito Sandstone (Ss) within the regional stratigraphy. The red bar shows the stratigraphic interval for which limited-interval isochore maps were made in the course of this study. Modified from Fassett (2014) with permission
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Limited-interval isochore maps of electrofacies 1 in the <span class="search-highlight">Tocito</span> <span class="search-highlight">Sandstone</span> i...
Published: 01 September 2021
Figure 6. Limited-interval isochore maps of electrofacies 1 in the Tocito Sandstone in Bisti field. Electrofacies 1 corresponds to the bar facies of Sabins (1963) and forms the conventional reservoir in Bisti field. Intervals M7 and M9 comprise the Upper Tocito ( Figure 4 ). Intervals M11
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Electrofacies in the <span class="search-highlight">Tocito</span> <span class="search-highlight">Sandstone</span> in the Bisti field area from the same...
Published: 01 September 2021
Figure 7. Electrofacies in the Tocito Sandstone in the Bisti field area from the same well log as shown in Figure 4 . Facies are defined by readings on the spontaneous potential (SP) and resistivity logs. Facies 1 (yellow) has relatively high readings on both SP and resistivity logs
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Facies association map for M7 interval of the <span class="search-highlight">Tocito</span> <span class="search-highlight">Sandstone</span> in the Bisti...
Published: 01 September 2021
Figure 8. Facies association map for M7 interval of the Tocito Sandstone in the Bisti field area. Isochore contours and color bars show the thickness and areal distribution of each electrofacies. Contour interval is 5 ft. Source rock kitchen is to the northeast (see Figure 2 ). Facies 1
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Summary of facies in the <span class="search-highlight">Tocito</span> <span class="search-highlight">sandstone</span> unit. Grain-size abbreviations ar...
Published: 30 April 2021
Table 1.— Summary of facies in the Tocito sandstone unit. Grain-size abbreviations are: vf, very fine-grained; vfL, lower very fine-grained; vfU, upper very fine-grained; f, fine-grained. Ichnogenera abbreviations are: O , Ophiomorpha ; Pa , Palaeophycos ; Pi , Planolites ; Ph
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Representative measured section of the <span class="search-highlight">Tocito</span> <span class="search-highlight">Sandstone</span> illustrating typica...
Published: 30 April 2021
Fig. 7.— Representative measured section of the Tocito Sandstone illustrating typical facies, including grain size, sedimentary structures, bioturbation index (BI), and paleocurrent measurements. Note that paleocurrent measurements are dominantly in southeast to southwest directions.
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A)  Photo showing the succession of facies of the <span class="search-highlight">Tocito</span> <span class="search-highlight">Sandstone</span>. The abr...
Published: 30 April 2021
Fig. 8.— A) Photo showing the succession of facies of the Tocito Sandstone. The abrupt boundary between F1 and F2 indicates an abrupt increase in sediment influx. B) Photo showing repeated successions of facies. The successions are commonly bounded by flooding surfaces. Note that some facies
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(A) Productive <span class="search-highlight">Tocito</span> <span class="search-highlight">sandstone</span> reservoirs, northwestern San Juan basin, sh...
Published: 01 December 2003
Figure 15 (A) Productive Tocito sandstone reservoirs, northwestern San Juan basin, shown in black. Dashed lines are basement block faults identified by Stevenson and Baars (1986) . Dotted lines are basement faults identified by Huffman and Taylor (1989) . Tocito sandstone reservoirs parallel
Series: SEPM Special Publication
Published: 01 January 1987
DOI: 10.2110/pec.87.41.0241
EISBN: 9781565760950
... rivers to return to grade by depositing a coarse fluvial sandstone (Torrivio Mbr of the Gallup Sandstone), enhanced the bypassing of fines, and intensified storm-induced coarse-grained sediment transport onto the distal shelf (Cooper Arroyo and basal Tocito Sandstones). The subsequent transgression...
Series: AAPG Memoir
Published: 01 January 1972
DOI: 10.1306/M16371C47
EISBN: 9781629812205
... Tocito reservoir at Horseshoe Canyon is an excellent example of post-unconformity sandstone, whereas the productive “Bisti” sandstone is a marine bar sandstone. At Horseshoe Canyon field, up to 90 ft (27 m) of sandy marine shale overlies the lower Tocito sandstone and separates it from the upper Tocito...
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1952
AAPG Bulletin (1952) 36 (5): 962–963.
... barrels of oil daily since completion. Cumulative production of the field to January 1, 1952, was 64,054 barrels of oil. The limits of the field have not been defined; however, one mile south and updip from the discovery well, the Doswell-Pettigrew No. 1 State found the Tocito sandstone to be tight...
Journal Article
Journal: AAPG Bulletin
Published: 01 June 1960
AAPG Bulletin (1960) 44 (6): 958.
...Robert P. McNeal; Floyd H. Miller ABSTRACT Commercial quantities of gas can be produced from the Gallup and “Tocitosandstones in nine fields on the southwest and west flanks of the San Juan basin. These fields are Bisti, Gallegos, Escrito, Otero, Doswell, Chimney Rock, Horseshoe Canyon, Verde...