摘要
杭锦旗地区位于鄂尔多斯盆地北部伊盟隆起杭锦旗断阶带上,下石盒子组为辫状河和河流相沉积。通过薄片观察、岩心物性分析和压汞曲线实验,对岩石学特征、物性特征、孔隙结构特征进行了分析。结果表明:下石盒子组砂岩储层孔隙类型,主要有剩余原生粒间孔、次生孔隙和高岭石晶间隙;裂缝不发育;孔隙结构可分为细喉微孔型、粗喉大孔型和细喉中孔型三类,其中以细喉中孔型为主。储层为中低孔、低渗储层,盒3段物性最好。利用径向基神经网络解释的孔隙度参数在岩心实验校正后进行储层平面分布评价,结果表明:锦2、锦6～锦7井区是下石盒子组有利发育带。
Hangjinqi area is located on the Hangjinqi trap,Yimeng,northern Ordos Basin.The lower Shihezi belongs to braidedrive and meandering river sedimentary facies.The properties of the lithology,physics and pore structure are studied based on core physical property analysis,rock thin-section identification,capillary pressure curve measurement.The results show that the main types of pores are remained primary pore,second pore and pore between kaolinites,and fracture in this zone is undeveloped.The pore structural can be classified as thin throat-mircopore,wide throat-big pore and thin throat-middle pore,and the main pore structure is thin throat-middle pore.Petrophysical parameters prove that reservoir in this zone belongs to mid to low porosity,low permeability reservoir.The reservoir physical property of He3 member is the best one among the three members.The evaluation results of the reservoir,by the porosity parameters given by RBF and revised by core experiments,show that Jin6-jin7 zone is the beneficial zone of lower Shihezi formation.
出处
《物探化探计算技术》
CAS
CSCD
2007年第1期30-34,92-93,共5页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家重点实验室项目"油气藏地质及开发工程"(Kt2003-6)
关键词
鄂尔多斯盆地
杭锦旗地区
下石盒子组
储层物性特征
分布评价
ordos basin
Hangjinqi area
lower Shihezi formation
reservoir physical property
evaluation of distribution
