This paper deals with diagenesis of Yan-10 Sandstones, Yanan Series, jurassic—the main producing horizons in an exploratory area in Shan-Gan-Ning Basin. The effects of diagenesis on pore texture and petrophysical properties of sandstone, its effects on forming trapping conditions for oil pools, the genesis of low permeability zone near the oil-water boundary, as well as secondary pores together with authigenic clay minerals of sandstone are presented. Furthermore, the paper describes briefly Yan-10 sandstones in some other areas.

Keywords:
porosity, diagenesis, precipitation, ankerite, dissolution, reservoir characterization, intergranular pore, petrophysical property, yan-10 sandstone, upstream oil & gas
Subjects:
Reservoir Characterization, Formation Evaluation & Management, Exploration, development, structural geology
Copyright 1982, Society of Petroleum Engineers
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