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松辽盆地大情字井地区高台子油层储集层孔隙结构的微观特征
石油与天然气地质
2006年 27卷 第No.5期
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Title
The microscopic features of pore structure in Gaotaizi oil layer of Daqingzijing area
Authors
Zhang Dawei
Chen Fajing
Cheng Gang
摘要
岩石孔隙结构特征是影响储层流体(油、气、水)的储集能力和开采油气资源的主要因素,因此明确储集层岩石的孔隙结构特征是充分发挥油气产能和提高油气采收率的关键。根据岩心分析、铸体薄片和岩石图像分析方法,尤其是运用了激光扫描共聚焦显微镜三维图像分析方法,对大情字井地区白垩系下统青山口组高台子油层低渗透孔隙结构进行了综合研究,重点讨论了孔隙度和渗透率的关系、孔隙结构对渗透率的影响以及影响储层储集性的因素。
Abstract
Rock pore structure is a main factor affecting oil and gas recovery and fluid(oil,gas and water)storage capacity of reservoirs.Therefore,understanding the features of pore structure is crucial for improving productivity and recovery factor.The pore structure in Gaotaizi oil layer of low permeability in the Lower Cretaceous Qingshankou Formation in Daqingzijing area are studied comprehensively by utilizing several analytical methods such as core,cast thin section and petrographic images,especially laser scanning confocal microscopic 3-D image. Three topics concerning the issue are discussed here:(1)relationship between porosity and permeability;(2)influence of pore structure upon porosity and permeability;and(3)factors affecting the capacity of a reservoir.
关键词：
孔隙结构;
图像分析;
控制因素;
储层评价;
低渗透储层;
高台子油层;
松辽盆地;
Keywords:
pore structure;
images analysis;
control factor;
reservoir evaluation;
reservoir of low permeability;
Gaotaizi oil layer;
the Songliao Basin;
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