歧口凹陷歧南斜坡深部储层特征及综合评价  

Characteristics and comprehensive evaluation of deep reservoirs in Qinan ramp,Qikou Sag

作　　者：张晶[1] 李双文[1] 刘化清[1] 袁淑琴[2] 牛海清[1] 刘志刚 

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020 [2]中国石油大港油田分公司勘探开发研究院,天津300280 [3]中国石油玉门油田分公司勘探开发研究院,甘肃酒泉735019

出　　处：《岩性油气藏》2013年第6期46-52,共7页Lithologic Reservoirs

基　　金：中国石油天然气股份有限公司重大科技专项"歧口富油气凹陷大油气田勘探及综合配套技术研究"(编号:2008-030504)资助

摘　　要：运用岩石薄片、铸体薄片、扫描电镜及物性分析等资料,对歧口凹陷歧南斜坡深部储层特征及影响因素进行了深入研究。结果表明:沙三段储层属特低孔、低孔-特低渗型,纵向上发育3个次生孔隙发育带;沉积相带、溶蚀作用和异常高压是影响深层次生孔隙发育的三大主要因素;裂缝的发育对深部储层也具有改造作用。根据储层物性、砂岩厚度和压力系数等,将研究区储层分为4类,其中Ⅰ,Ⅱ类储层物性较好,是今后增储上产的主要储层。By analyzing thin sections, scanning electronic microscope and physical properties, this paper studied the characteristics and influencing factors of deep reservoirs in Qinan ramp of Qikou Sag. The result shows that the third member of Shahejie Formation belongs to low porosity and ultra-low permeability reservoir, there developed three secondary pore zones in the vertical direction. The development of deep secondary pores is dominated by sedimentary facies belt, dissolution and anomalous pressure, and the occurrence of fractures can reform the deep reservoir. According to the physical properties, sandstone thickness and pressure coefficient, the reservoir in the study area can be divided into four types. The reservoirs of type I and Ⅱ have better physical properties and they are the main reservoirs to increase production in the future.

关 键 词：储层特征 次生孔隙 综合评价 深部储层 沙三段 歧口凹陷 

分 类 号：TE122.23[石油与天然气工程—油气勘探]