Depositional and diagenetic history of Bodcaw Sand, Cotton Valley group (upper Jurassic), Longwood field, Caddo parish, Louisiana

Conference · Sat Mar 31 23:00:00 EST 1984 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6434480

Russell, Jr, B J

Bodcaw Sand has low porosity and permeability. Vertical and lateral variation in porosity and permeability are related to depositional textures and diagenetic fabric of Cotton Valley sediments. Bodcaw Sand has experience a complicated diagenetic history. Compaction, cementation, replacement, and dissolution modified primary rock properties following deposition of barrier-bar sediments. Cementation plays an important role in modification of reservoir properties. Important authigenic minerals identified in Bodcaw Sand include silicates, carbonates, and phyllosilicates. Based upon textural relationships between allogenic grains, authigenic constituents,and pore characteristics, a relative succession of diagenetic events can be interpreted. Two major diagenetic sequences occurred within Bodcaw Sand. Diagenetic events within one sequence included cementation by silica, phyllosilicates, and calcite, as well as, dissolution and replacement reactions. The other sequences primarily involved diagenetic reactions of calcite precipitation, dissolution, and replacement.

• Research Organization: Stephen F. Austin State Univ., Nacogdoches, TX
• OSTI ID: 6434480
• Report Number(s): CONF-8405216-
• Journal Information: Am. Assoc. Pet. Geol., Bull.; (United States), Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Vol. 68:4; ISSN AAPGB
• Country of Publication: United States
• Language: English

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