滩坝砂是港中复杂断块油田沙一段重要储集层，滩砂和坝砂在砂体厚度及后期产能方面差异明显。为揭示港中油田富油砂体复杂的分布特征及控油模式，从动静态资料入手，逐次重点分析区内砂体、有效储层、油砂体的纵横向分布变化，引入并界定港中油田富油砂体概念、标准。研究认为，港中油田滩坝砂富油砂体具地质储量大，单井日产高，原始地层压力高、稳产时间长的特点。纵向上主要分布在板3油组和滨Ⅰ油组等5个主力单砂层，平面上主要分布在南四断块、北三断块。探讨了复杂断块油气田富油砂体分布受控因素及分布模式，指出沉积相控、成岩控油、断层控油、微构造控油及构造-岩性控油是港中油田滩坝砂油气富集5种主要控油模式。%Lacustrine beach-bar sand is one of the important reservoir types in GangZhong complex fault block oilfield, and beach-bar sand have obvious differences in the thickness and the later sand production. In order to reveal the distribu-tion pattern of oil sands, this paper Sequentially analyzes the distribution changes from sandbody, reservoir sand, and oil-sands, basing on dynamic and static data. The concept and standard of“oil rich sand body”are put forward firstly in this paper . And the vertical and plane distribution of the rich oil sand body is illustrated. It suggest that the rich oil sand body has the big geological reserves, producing high, original formation pressure high, stable for a long time. Lastly, the pat-tern and factor of oil-control is analyzed and summarized, and the fault, micro structure,sedimentary facies,diagenesis, and various factors coupling relationship are the key distribution patterns in GangZhong oilfield .
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