Sand body configuration of composite channel in Huatugou oilfield

The sand body characteristics of the upper Ganchaigou formation in Huatugou oilfield were studied.The results showed that the single channel boundary in the delta front of Huatugou oilfield has five identification marks: inter channel deposition, elevation difference, thickness difference, lateral superposition,and 'thick-thin-thick' combination of channel sand body. The sand body of a single channel is 80 ～ 200 m wide and 2～5 m thick. Quantitative identification of single sand bodies in delta front composite underwater distributary channel was carried out. The results show that there are three main contact relationships among single sand bodies: isolated type, butt type and superimposed type. The practice of oilfield development and production proves that the division of single sand body is reasonable.