摘要
针对徐家围子断陷沙河子组致密储层孔隙结构、物性下限与油层分级标准亟待研究的需要,应用扫描电镜、低温N2吸附、核磁共振等多项技术,开展致密储层微观孔隙结构和流体可动性研究,明确了致密储层孔隙类型、孔喉特征及组合关系,建立了储层孔隙结构与可动流体饱和度的关系。在此基础上,采用束缚水膜厚度法、可动性拐点法和试气产能法,建立了沙河子组致密气储层物性下限和储层分级评价标准,该研究为下步致密储层致密化成因、成岩演化序列和优质储层甜点预测奠定了坚实的基础。
SEM,low-temperature N2 adsorption,NMR and other methods are used to study the pore structure,lower physical properties and reservoir classification standard of tight reservoirs in Shahezi formation of Xujiaweizi Fault-Depression. The microscopic pore structure and fluid mobility are investigated to identify the pore classification,pore-throat properties and combinationsof tight reservoirs and determine the relationship between reservoir pore structure and movable fluid saturation. Based on the above investigation,bound water film thickness,mobility inflection and gas test productivity methods are used to establish the lower reservoir properties and reservoir classification standard of tight reservoirs in Shahezi formation. This research could lay a firm foundation for the densification genesis analysis,diagenesis evolution sequence and high- quality reservoir sweet- spot prediction of tight reservoirs in the next step.
出处
《特种油气藏》
CAS
CSCD
北大核心
2016年第3期113-117,156,共5页
Special Oil & Gas Reservoirs
基金
中国石油天然气股份有限公司科学研究与技术开发攻关项目"大庆探区非常规油气勘探开发关键技术研究与现场试验"(2012E-2603)
关键词
致密储层
孔隙结构
束缚水膜
储层分级
徐家围子断陷
沙河子组
tight reservoir
pore structure
bound water film
reservoir classification
Xujiaweizi Fault-Depression
Shahezi formation
