沙特B区块致密砂岩氮气速敏实验评价新方法  

A NEW METHOD OF EVALUATING SPEED-SENSITIVITY EXPERIMENT OF TIGHT SANDSTONE GAS IN SAUDI ARABIA B BLOCK

作　　者：张浩[1] 黄丽[2] 金军斌[3] 肖超[3] 李兵刚 

机构地区：[1]油气藏地质及开发工程国家重点实验室.成都理工大学 [2]中国石油西南油气田公司川东北气矿 [3]中国石化石油工程技术研究院 [4]中国石油长庆油田分公司第五采气厂

出　　处：《钻采工艺》2011年第2期76-78,117,共3页Drilling & Production Technology

基　　金：国家重大专项"中东中亚富油气区复杂地层深井钻完井技术"项目(编号:2008ZX05031-004)资助

摘　　要：沙特B区块主要目的层为SARAH组,储层孔隙度低于8%,原地应力条件储层渗透率低于0.1×10-3μm2,属于典型的致密砂岩气层。在开发中发现有严重的储层损害问题。因此,有必要对储层进行敏感性实验评价研究。由于气层致密、孔喉细小,在设计敏感性实验时以气测渗透率为中心进行,实验方法以氮气为驱替流体,利用气体质量流量计测量气体的流速。敏感性实验研究结果表明,该储层存在中等偏弱速敏,气体速敏的测定为后续以气测渗透率为中心的流体敏感性实验评价打下了基础。The main target stratum of Saudi Arabia B block is SARAH formation,the reservoir porosity is less than 8%,and under original crustal stress,the reservoir permeability is less than 0.1×10-3μm2,so it belongs to typical compacted sandstone gas reservoir.In development,the serious problem of reservoir damage was found,therefore,it is necessary to do evaluation and research of sensitivity experiments on reservoir.Because gas zone is fine and close,and pore throat is tiny,in the design of sensitivity experiments,the nitrogen has been taken as fluid displacement,using gas mass flow meter measure the flow velocity of gas.The research results of sensitivity experiments showed that,the reservoir exists medium weak speed-sensitivity,and the determination of gas speed-sensitivity lays the foundation for subsequent evaluation of sensitivity experiments,which is based on the gas permeability test.

关 键 词：沙特 致密砂岩 速敏 储层损害 实验方法 

分 类 号：P618.13[天文地球—矿床学]