About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 64 (1980)

Issue: 9. (September)

First Page: 1567

Last Page: 1567

Title: Hosston Trend, Mississippi: ABSTRACT

Author(s): Donald R. Scherer

Article Type: Meeting abstract


Since the 1974 discovery of commercial gas and condensate from deeper Hosston sands below 15,000 ft (4,592 m) at Bassfield field, the exploration effort seeking similar reservoirs in the Hosston trend in south Mississippi continues to grow. From 1951 through 1970, a total of 30 new fields were discovered from Sligo-Hosston reservoirs: 28 oil and 2 gas. However, from 1971 through 1979, 33 new fields were discovered, of which 28 are gas and 5 are oil. The striking relation of more recent gas discoveries rather than oil is significant.

The increase in exploration activity for gas reservoirs was due to three major factors: the critical national energy shortage, the favorable success of finding commercial gas below 15,000 ft (4,572 m), and the continued increase in the value of an Mcf of gas, which skyrocketed from 15 to 20ยข per Mcf prior to the early 1970s to more than $3 per Mcf in recent months.

A series of very fine-grained tight sandstones is present in the top 1,000 ft (305 m) of the Hosston Formation. The most favorable objective is the Booth Sand found about 600 ft (183 m) below the top. However, other sands (above and below) have recently been proven to be equally favorable in distribution and thickness, as well as in productivity. Productive Hosston sands have a porosity range from 7 to 15%; permeability ranges up to 1,000 md and although occasionally may be higher, generally averages in the low hundreds.

Many fields produce formation water along with gas condensate having 100,000 to 160,000 ppm chlorides. Water yields range from less than 1 bbl/MMCFG to 115 bbl/MMCFG. Condensate yields range from less than 1 bbl/MMCFG to 80 bbl/MMCFG. Productive sand thickness ranges from 5 to 70 ft (1.5 to 21 m). Commercial production depends more on sufficient permeability than net thickness of pay. Flow rates in some of the better fields have sustained production of more than 4 MMCFGD per well. Recoverable reserves per 640-acre (256 ha.) unit for an average Hosston reservoir having 20 ft (6.1 m) effective pay will range 5 to 9 BCFG and 100 to 200 MBC.

As long as operators continue to find new fields of this magnitude, the efforts will continue to escalate and indications are that the future still looks encouraging for many more years to come. We have only begun to "scratch the surface."

End_of_Article - Last_Page 1567------------

Copyright 1997 American Association of Petroleum Geologists