摘要
准噶尔盆地玛湖凹陷砾岩储层超压发育广泛,超压储层具有物性好、产能高的特点,已经成为寻找优质储层的重点勘探领域.基于岩石物理实验和测井及试油资料,对超压砾岩储层测井响应特征进行了分析研究,确定了泥岩欠压实是该区超压的成因机理,超压地层具有低电阻率、高声波时差的特征.在欠压实成因超压下,地层的孔隙结构以基质孔和砾面孔为主,孔隙度渗透率关系呈现低孔隙度高渗透性的特征.构建了评价储层品质的超压物性指数,形成了用于定量评价储层物性和油层评价的关键技术.基于此,确定了泥岩超压和储层孔隙结构是影响储层产能大小的主控因素,建立了储层分类的方法,在勘探评价中取得显著的应用效果.
The overpressure conglomerate reservoirs in the Mahu sag of the Junggar Basin are extensive and characterized by good physical properties and high productivity.Such reservoirs have become key exploration targets for high-quality reservoirs.Based on petrophysical experiments,well logging and production test data,this paper analyzes the logging response characteristics of the overpressure conglomerate reservoir,and points out that the uncompact mudstone is the cause for the overpressure reservoir,and the overpressure formation has low R t and high AC.In the uncompact formation,matrix pores and conglomerate surface pores are dominant,the porosity is low while the permeability is high.Finally the overpressure physical property index for evaluating reservoir quality is constructed,and the key technology for quantitative evaluation of reservoir physical properties are established.Based on them,the factors affecting the reservoir productivity are attributed to the overpressure caused by mudstone and the pore structure,and the reservoir classification method is developed.These methods are applicable and effective in field exploration and evaluation.
作者
曹志锋
黄卫东
蔺敬旗
王先虎
张凯
柴新辉
CAO Zhifeng;HUANG Weidong;LIN Jingqi;WANG Xianhu;ZHANG Kai;CHAI Xinhui(Xinjiang Branch,China Petroleum Logging CO.LTD.,Karamay,Xinjiang 834000,China;Division of Exporation,Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang 834000,China)
出处
《测井技术》
CAS
2019年第6期636-641,共6页
Well Logging Technology
基金
中国石油集团测井有限公司十三五重大科技专项“低对比度油气层测井识别技术研究与应用”(2019D-3089)
关键词
测井评价
砾岩储层
欠压实
超压
孔隙结构
储层分类
准噶尔盆地
log evaluation
conglomerate reservoir
uncompact
overpressure
pore structure
reservoir classification
Junggar Basin
