Study On The Regularities Of Distribution Of Remaining Oil In The Sedimentary Microfacies Of River Mouth Sandbar At High Water Cut Stage

River mouth sandbar is the mian composed of delta front sedimentary sand, as its main bearing part of continental Chinese total oil reserves are worth further study, the study on distribution of remaining oil in the estuary sand dam measures will become the basis for guiding the continued exploitation of large oil fields, the study regularity of distribution of remaining oil in the river mouth sandbar will become the basis for guiding the tapped of large oil fields. A series of conceptual models are established for the single type of estuary sand dam by controlling the conditions of injection, formation thickness, stratum development, vertical permeability, At the same time, the numerical model is established for the limit of the water content. Combined with the results of the above data, the distribution of remaining oil and the factors affecting the formation of remaining oil in the sandbar. Through a series of analysis we get the following conclusions: The formation and development status and physical properties of the interlayer will affect the existence of remaining oil in a single river mouth sandbar, effect of well network distribution and plane range will be on the bay between distributary channels development and estuary sand dam formed certain restrictive function.