摘要
昆北油田切12区块第三系下干柴沟组沉积时期砂砾岩储层厚度大,内部砂体多期叠置,非均质性极强。对影响储层质量的主控因素认识不清导致了油藏动用状况和生产效果不佳。基于取心井岩心观察,并结合薄片鉴定、压汞分析、核磁共振及物性等资料,从岩石学、物性及孔隙结构方面分析厚层块状砂砾岩的储层特征及储层质量主控因素,建立了切12区块砂砾岩"甜点"储层识别标准。研究表明:切12区块第三系下干柴沟组储层质量受岩石粒度分选、泥质体积分数、成岩作用等主控因素影响。根据岩性、物性指数、排驱压力、日产液能力等参数建立"甜点"储层识别标准,并提出寻找油井"甜点"储层段补孔、注水井"甜点"储层水窜段封堵调剖等油藏开发调整措施,为厚层块状砂砾岩油藏提高采收率提供有力的技术支持。该研究方法对其他类型的储层质量主控因素研究有一定适用性。
During the sedimentary period of lower Gauchaigou formation in Tertiary system, Qiel2 block, Kunbei oil field, glntenite reservoir was thick and the multiple periods of sand body were superposed with each other, with extremely strong heterogeneity. The unclear understanding of dominant controlling factors of reservoir quality leads to poor reservoir depletion and production results. Based on core observation, thin section analysis, mercury injection analysis, nuclear magnetic resonance and physical properties, the reservoir characteristics and dominant controlling factors of reservoir quality for thick block glutenite are analyzed in texans of petrology, physical properties and pore structure and identification standard is built for glutenite ~lsweet spot＂ reservoir in Qie12 block. The research shows that reservoir quality of lower Ganchaigou formation in Tertiary system in Qiel2 block is affected by dominant controlling factors including sorting features of rock particles, volume fraction of mud and diagenesis. Identification standard for 61 sweet spot~＇ reservoirs is built according to lithology, physical performance index, displacement pressure and daily liquid productivity. Reservoir development adjustment measures are proposed including searching for ＂sweet spot＂ reservoirs in oil wells for reperforation and ＂ sweet spot＂ water breakthrough zones in injection wells for water plugging and profile control, in order to provide strong technical support for improved oil recovery in thick block glutenite reservoirs. This investigation method is applicable to research on dominant controlling factors of res- ervoir quality in other types of reservoirs.
出处
《特种油气藏》
CAS
CSCD
北大核心
2017年第4期32-37,共6页
Special Oil & Gas Reservoirs
基金
中国石油科技重大专项"低/超低渗透油田有效开发关键技术研究"(2016B-1201)
关键词
砂砾岩
储层质量
主控因素
“甜点”储层
开发调整
昆北油田
glutenite
reservoir quality
dominant controlling factor
＂sweet spot＂ reservoir
development adjust-ment
Kunbei oil field
作者简介
惠钢（1986-），男，工程师，2008年毕业于中国地质大学（北京）石油工程专业，2011年毕业于中国石油勘探开发研究院油气田开发工程专业获硕士学位，现从事气田开发地质研究工作。
