关键词: 储层构型, 剩余油分布, 侧积体, 点坝, 曲流河, 油藏数值模拟, 孤岛油田

Abstract: Taking 11J11 dense spacing area of Gudao Oilfield in Shengli oil area as a case,the data of coring,logging and performance of wells were used to analyze the former results about outcrop and modern deposition of meandering river.A comprehensive analysis method for reservoir architecture of point bar was proposed.The recognition mark of point bar in the studied area was determined.According to the satellite pictures of meandering river of Yueliangpao in Nenjiang River,the relational expression of the length of point bar and the width of bankful channel was derived.The three distribution patterns of lateral accretion shale beddings were summarized.The empirical formula,data of horizontal wells and dense spacing wells were used to ascertain the scale and occurrence of lateral accretion sandbody.The architecture of the point bar reservoir in the studied area was anatomized.The research results are in good accordance with the performance data of ascertained well.The models of three-dimensional reservoir architecture and reservoir parameters were set up.The numerical simulation of reservoir shows that the remaining oil was distributed in the middle-upper point bar.This method was successfully applied in Gudao Oilfield and could be used in other similar oilfields.

Key words: reservoir architecture, remaining oil distribution, lateral accretion sandbody, point bar, meandering river, numerical simulation, Gudao Oilfield