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Ground stress field modeling and relation to hydrocarbon migration.

Ge, Yunlong; et al. (Huabei Petroleum College for Staff and Workers, Hebei 065006, P. R. China).  
The influence of ground stress field on migration accumulation of oil and gas is an important issue in mechanism study of the migration accumulation. Damintun sag is a well explored hydrocarbon rich but small sag. Based on the full and accurate EP data of the sag, to study the regular relation of its ground stress field to hydrocarbon migration accumulation has guiding significance for the exploration in other small basin or depression. The palaeostructural stress field in principal period of hydrocarbon migration in the sag is modeled, the distributions of pore fluid pressure and oil potential are computed on the basis of the simulated ground stress field, and main migration direction and accumulation place of oil are predicted. The study results essentially coincide with the actual situation of the oil field. It can be concluded from the study that: oil always migrates from high potential area to low potential area, and the low potential area of oil is accumulation place of oil. Change of ground stress influences pore pressure and oil potential, thus has a great influence upon oil migration accumulation. In the direction parallel to maximum principal stress (perpendicular to minimum principal stress) the communication of reservoir is the best, and the direction is the major direction of oil migration. While direction of previous main faults that intersect the maximum principal stress by minor angle also probably becomes the major migration direction of oil and gas. Subject
【CateGory Index】: P618.130.1
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China Proceedings of conference Full-text Database 1 Hits
1 Li Yuxi Fu Guang Shen Jianian(Daqing Petroleum Institute, Anda Pkilongjiang);Relationship of Tectonic Moves and Fluid Migration[A];[C];1999
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