Fan deltas, braid river deltas and meandering river deltas are developed extenively in the Jurassic of northwestern China. Fan deltas are related to steep basin margins where the total subsidence rate exceeds the sedimentation rate. Their depositional sequences are aggradational. Fan deltas are characterized by exclusively ephemeral discharge in which sediments are transported by a combination of sediment gravity flows and nonchannelized sheetfloods. Braid deltas are associated with gentle basin-margin gradients. Gentle basin-margin gradients are a result of a high sedimentation rate relative to the subsidence rate and account for progradational sequences. Braid deltas are typified by well-developed channel flow. Meandering river deltas are related to the structural boundary of gentje-slope depression type, where river action is dominant and lake action is subordinate. The three deltas have good potentials of oil and gas storage and are important targets of exploration of Jurassic oil and gas in northwestern China.