川东北普光地区须家河组裂缝特征描述  

Fracture features description of Xujiahe Formation in Puguang area,northeastern Sichuan Basin

作　　者：唐群英[1] 尹太举[1] 路遥[1] 蔡文[1] 吴军 任强燕 

机构地区：[1]长江大学油气资源勘探技术教育部重点实验室 [2]中国石油青海油田分公司采油三厂

出　　处：《岩性油气藏》2012年第2期42-47,共6页Lithologic Reservoirs

摘　　要：川东北普光地区陆相地层主要目的层须家河组岩性致密,储层物性差,表现为低孔、低渗特征。利用岩心、薄片、EMI成像测井3个方面的资料对普陆1井须家河组裂缝开展精细描述与分析研究,探讨了裂缝的类型、特征和分布规律,分析了裂缝对储层储集性能和气层生产能力的影响。结果表明,须家河组发育有高角度构造缝和低角度非构造缝,裂缝充填程度高,主要被方解石和碳质充填,裂缝发育程度高但纵向分布不均,主要分布于须二段、须四段和须六段。分析认为,裂缝不仅成为流体的储集空间,还是重要的流体渗流通道,对于改善储层的储集性能起着重要作用。As the main target layer of terrestrial formation in Puguang area,Xujiahe Formation is characterized by poor properties,low porosity and low permeability.Based on core description,slice observation,EMI imaging logging,this paper carried out fine description and study on fractures of Xujiahe Formation in Pulu 1 well,discussed the types,characteristics and distribution rules of fractures,and analyzed its influence on reservoir properties and production capacity.The result shows that fractures developed in Xujiahe Formation in the study area are almost structural with high angles and non-structured with low angles,which have a high degree to be filled by carbon and calcite,and fractures highly developed but unevenly distributed in the second,fourth and sixth member of Xujiahe Formatrion in vertical.It is considered that fractures not only become reservoir spaces of fluid,but also be the flowing channels of fluid,which plays an important role in improving reservoir properties.

关 键 词：须家河组 致密砂岩储层 裂缝 普光地区 四川盆地东北部 

分 类 号：TE122.2[石油与天然气工程—油气勘探]