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 ２１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２１－１油层分布广泛，含油厚度大，长２１－２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。
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 21- 1 oil horizon is exten- sively distributed with thick oil-bearing bed; Chang 21- 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.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2001年第2期146-149,164,共5页
Oil & Gas Geology
关键词
低渗透储层
沉积特征
长2油层
油水分布
控油因素
顺宁油田
砂岩储层
low permeable reservoir
sedimentary characteristics
Chang - 2 oil horizon oil-water distibution
oil-controlling factor
