--> ABSTRACT: Clay Compaction Study for the Evaluation of Gas Hydrocarbon Migration and Accumulation, by A. Bushi, Z. Xhafa, and F. Muhaj; #91021 (2010)

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Clay Compaction Study for the Evaluation of Gas Hydrocarbon Migration and Accumulation

BUSHI, A., Z. XHAFA, and F. MUHAJ

This study presents in a summarized form the main factors which have influenced the migration accumulation conditions of the commercial gasbearing beds discovered in Tortonian and Pliocene deposits in Pre-Adriatic depression.

Based on the geochemical studies, field data and concepts on sediment migration we drew these conclusions:

1. the chief role in gas migration and accumulation mechanism is played by the clay sediment compaction phenomenon which reflects on apparent connection between gas-bearing beds and accumulation zones.

2. It is noted a correlation between sandstone reservoirs sizes and their gas saturation.

3. Based on the clay thickness nature (their compaction, extension conditions and minerologic-petrographic composition) it is concluded that the sealing capacity of the clay caprock can effectively retain a gasbearing column twice as thick.

4. Complex analysis of the migration and the accumulation conditions of the proved gasbearing beds allows the anticipation of other beds. 

AAPG Search and Discovery Article #91021©1997 AAPG Annual Convention, Dallas, Texas.