SAND PRODUCTION PREDICTION DURING THE DEVELOPMENT OF SANDSTONE OILFIELDS

The reservoir of Wangguantun oilfield is a rapidly deposited fan-delta sandbody near source area. Because of fine lithology, thin layer, poor diageneses and loose reservoir structure, sand production is quite common in production wells. The problem of sand production is discussed from the aspects of sedimentary microfacies, reservoir heterogeneity, rock microstructure and development measure, and the mechanism, reason and law of sand production are found. Through quantitative analysis, the sand production layer and area are predicted, and the technique methods for controlling sand production are proposed, that is, sealing off sand layers in serious sand production wells, avoiding the thin oil layers and the top of thick oil layers during gun perforation in new wells, and controlling flood pressure and injection allocation.