The AAPG/Datapages Combined Publications Database
AAPG Bulletin
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AAPG Bulletin; Year: 2023; Issue: July DOI: 10.1306/10242221068
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Figure 16.
(A) The in situ stress ratio, σh /σv , has a significant effect on the possibility of creating vertical microcracks. Small values (0.6–0.7) of this ratio favor the creation of vertical microcracks under the stress regime that prevails on the Arabian Peninsula. These vertical microcracks are responsible for primary migration of hydrocarbons. (B) The time required to create a connected network of horizontal and vertical microcracks. The horizontal microcracks connected between 65 and 60 Ma. The compression-induced vertical microfractures formed between 65 and 57 Ma. The pore pressure-induced microfractures in spherical kerogen specks formed between 50 and 50 Ma, and the vertical microcracks are created and connect between 55 and 50 Ma for the stress ratio, σh /σv in the range of 0.7–0.75. The connected vertical microcracks led to primary hydrocarbon migration. σh = horizontal stress; σv = vertical stress.
Figure 16.
(A) The in situ stress ratio, σ