W油藏粘土矿物特征及油层低阻成因  

CHARACTERISTICS OF CLAY MINERALS IN W LOW RESISTIVITY RESERVOIRS AND THE GENESIS OF LOW RESISTIVITY

作　　者：廖明光[1] 苏崇华 唐洪[1] 姜巍 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500 [2]中海石油有限公司湛江分公司研究院,广东湛江524057 [3]中国石油川庆钻探公司地质勘探开发研究院,四川成都610051

出　　处：《西南石油大学学报（自然科学版）》2010年第5期70-74,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：中海油国家重大科技专项(2008ZX05030-002);四川省重点学科“矿产普查与勘探”建设项目(SZD0414)

摘　　要：W油藏Z1油组为高孔低渗低阻油藏,低阻油层的地质成因复杂多样。依据Z1油组储层发育特征,研究了储层粘土矿物的类型、颗粒的分布形式和泥质含量,以及上述粘土矿物特征对Z1油组低阻的影响。研究发现,Z1油组低阻层段的粘土类型以伊蒙混层为主,其相对含量高;粘土颗粒较均匀地成薄膜状、絮状分布;平均泥质含量高。粘土矿物组构产生的附加导电性和高泥质含量是影响Z1油组低电阻率的重要因素之一。The reservoir of Z1 oil group in W Oilfield has low resistance,high-porosity and low permeability.The geological formation of low resistivity reservoir has many reasons.In view of the developing features of Z oil group,the clay minerals types,clay particles distribution,clay content and the influence of them on the low-resistivity are studied.It can be found that the clay types in low resistivity layer segment of Z1 oil group is mainly the mixed layer of illite and montomorillonite and the content is relatively high.The clay particles are evenly distributed in a thin film and in flocculating form with high average clay content.Additional conductivity caused by clay minerals and high clay content are the main factors affecting the low resistivity of Z1 oil group.

关 键 词：低电阻率油层 粘土矿物 附加导电性 泥质含量 低阻成因 

分 类 号：TE122[石油与天然气工程—油气勘探]