Abstract: The eastern Lungu area in Tarim basin is of the stress with significant effect on the fractural development in its carbonate reservoir, with obvious differences of fractural development in different local stress fields. This stress is studied by using various well log data, particularly using dipole shear -wave acoustic log, including the present orientation, distribution and relative size of the stress. The multi-well processing results show that the stress direction/ orientation in carbonate reservoir obtained from well log data is an effective method. It is indicated that the present stress size in eastern Lungu area is closely related to its fractural development, thus controlling the local hydrocarbon accumulation to a certain extent.

Key words: Tarim basin, in-situ stress, fracture, dipole, shear wave, well log, carbonate reservoir