致密砂岩气藏微观孔隙结构参数定量评价——以苏里格气田东南区为例  

Quantitative evaluation of microscopic pore structure parameters of tight sandstone gas reservoir:A case the Southeast Area of Sulige Gas Field

作　　者：盛军[1] 孙卫[1] 赵婷 刘艳妮[3] 张弢 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系,陕西西安710069 [2]中国石油青海油田分公司涩北作业公司,格尔木816000 [3]中国石油长庆油田分公司勘探开发研究院,陕西西安710018 [4]中国石油川庆钻探工程有限公司工程技术研究院,陕西西安710018

出　　处：《西北大学学报（自然科学版）》2015年第6期913-924,共12页Journal of Northwest University（Natural Science Edition）

基　　金：国家科技重大专项大型油气田及煤层气开发基金资助项目(2011ZX05044)

摘　　要：常规镜下实验对储层微观孔隙结构的描述只能达到一个定性-半定量的结果,这对进一步研究储层的微观孔隙结构及其对储层渗流能力的影响是不够的。该文在常规镜下实验的基础上,通过高压压汞实验、恒速压汞实验等先进的实验手段对鄂尔多斯盆地苏里格气田东南区盒8段致密砂岩储层的微观孔喉特征进行了分析。结果表明,研究区内致密砂岩储层孔隙主要以溶蚀孔、晶间孔为主,喉道类型以管束状、片状喉道为主。储层主要以喉道控制型为主,孔喉配置关系主要为大孔-细/微细喉道。同时,根据恒速压汞实验结果,分别分析孔隙与喉道对渗流能力的影响,得出该区域致密砂岩气藏储层渗流能力主要受喉道控制,而喉道的发育程度决定了储层的最终物性特征。Conventional microscopy experiments describing microscopic pore structure can only achieve a qual- itative-semi-quantitative result, which is not enough for further study of the microscopic pore structure of reser- voir and its effect on reservoir flow capacity. This article is based on conventional microscope experiments, the characteristics of microscopic pore throat of tight sandstone reservoir of He-8 in Southeast Area of Sulige Gas Field of Ordos Basin were analyzed via the high pressure hg injection and the constant velocity mercury experi- ment. The results show that the dissolution holes and the intergranular pore are mainly reservoir porosity and the bundle throat and the flaky throat are main type of throat in the study area. The throat control reservoir is the main type in this area, the main configure relations of the pore throats in this area were big hole-fine/fine throat. Finally, according to constant velocity mercury results, the impact of pore and throats for seepage ca- pacity was analyzed respectively, coming to the conclusion that the tight sandstone gas reservoirs flow capabili- ty in study area is mainly affected by the throat, and the degree of development of the throat determines the physical characteristics of the final reservoir.

关 键 词：致密砂岩气藏 微观孔隙结构 定量评价 

分 类 号：TE122.23[石油与天然气工程—油气勘探]