Abstract:

Abstract: Sulige gas field, located at Sulige temple district in Ordos City, is a typical lithologic gas reservoir characterized by low porosity, low permeability and low abundance. In this paper, the distribution of sandbodies with relatively high permeability in the low permeability background is predicted and the relative gas enrichment zones are recognized in Su53 block. The reservoir heterogeneity is analyzed by using the logging and test data and combining with regional geological features. Meanwhile, 3D geological modeling results and microscopic analysis data are integrated to predict the inlayer, horizontal and interlayer heterogeneities in the eighth member of Shihezi Formation and the first member of Shanxi Formation in Su53 Block, Sulige gas field. The results suggest that both their inlayer and interlayer heterogeneities are strong, and are stronger vertically than horizontally. Sandbodies are highly developed in the upper part of the eighth member of Shihezi Formation. Their continuity is good along the channel but poor perpendicular to the channel, resulting in the strongest interlayer heterogeneity.