在三角洲油气勘探中,需要预测砂体的位置、形态和延伸方向,这些参数受制于水动力因素。河口地区影响三角洲发育的因素很多,但能形成砂体者主要是河口水流、波浪和潮流。据此三角洲砂体可分为河口砂体、浪成砂体和潮成砂体。在各个三角洲地区,达三种水 In deltaic oil and gas exploration, the location, shape and direction of sand body need to be predicted, and these parameters are subject to hydrodynamic factors. There are many factors affecting the development of the delta in estuaries, but the main factors that can form sand bodies are the water currents, waves and currents in estuaries. According to this delta sand body can be divided into estuaries sand bodies, waves into sand bodies and tidal sand bodies. In all Delta regions, up to three kinds of water