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顺宁油田低渗透砂岩储层沉积特征与控油因素
石油与天然气地质
2001年 22卷 第No.2期
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Title
SEDIMENTARY CHARACTERISTICS AND OIL-CONTROLLING FACTORS OF LOW PERMEABLE SANDSTONE RESERVOIRS IN SHUNNING OILFIELD
Authors
Wang Jianmin
Zhou Zhuoming
摘要
延长组长 2油层组为顺宁油田的主要产层,含油部分主要位于长 2油层,为典型的低渗透砂岩油层,由分流河道及分流间湾沉积组成,分流河道由北东向东南再向西南弯转,由主体、侧体及边部三部分组成,主体部分物性好,为油气主要聚集场所.长2油层分布广泛,含油厚度大,长2油层则分布局限,油层薄,二者同处一个油水系统,由主体向两侧由均匀-不均匀含油过渡到不均匀-斑状含油直至微含油.油水分布主要受相带、构造和砂体厚度等因素控制.
Abstract
Chang-2 oil-horizons of the Yanchang Formation is the main pay bed of Shunning Oilfield The main oil horizon-chang-1 oil horizon is a typical low permeable sandstone reservoir consisted of distributary channel and distrihutary hay sediments. The distributary channel consists of main body, side part and marginal hank. The main body poss eases favourable physical property and is the major place for hydrocarbon accumnlation. Chang 2 oil horizon is exten-sively distributed with thick oil-bearing bed; Chang 2 oil horizon is restricted with thin oil-bearing bed. They are-placed in the same oil-water system. The distribution of oil and water is mainly controlled by sedimentary facies, structures and the thickness of sand bodies.
关键词：
低渗透储层;
沉积特征;
长2油层;
油水分布;
控油因素;
Keywords:
low permeable reservoir;
sedimentary characteristics;
Chang-2 oil horizon oil-water distibution;
oil-controlling factor;
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