摘要
永进地区属罕见的超深、低渗透、稀油砂岩油藏,溶蚀作用和异常高压导致油藏次生孔隙发育。虽然异常高压和大量的溶解气提供了驱油能量,但是限于油藏埋藏超深和储层低渗透等特征,压裂改造措施投资大,施工难度大,驱油能量不能充分发挥作用。研究认为,该油藏应立足水平井天然能量开发,从弥补先天条件不足入手,通过地质攻关找到更厚、裂隙更发育的优质储层,通过钻探长井段水平井增加钻探到裂隙的概率,发挥好异常高压、溶解气丰富的优势,实现该类油藏的经济开发。
The Yongjin oilfield in Junggar Basin is a rarely seen ultra-deep,low permeability,light oil sandstone reservoir,where dissolution and abnormal high pressure had led to development of secondary pores.Although abnormal high pressure and a huge amount of solution gas provide oil displacement energy,fracturing stimulation is high cost and difficult to operate as limited by ultra deep reservoir burial depth and low permeability,and the oil displacement energy can not give full play.It is concluded through research that this oilfield should rely on natural drive with horizontal wells;quality reservoirs which are thicker and have more developed fractures should be found through geological research;long horizontal section should be drilled to increase the chances of encountering fractures;and the advantages of abnormal high pressure and abundant solution gas should be given full play,thus realizing economic development of such reservoirs.
出处
《特种油气藏》
CAS
CSCD
北大核心
2012年第3期63-66,153-154,共4页
Special Oil & Gas Reservoirs
基金
国家重大专项"准噶尔盆地碎屑岩层系大中型油气田形成规律与勘探方向"(2011ZX05002-002)
关键词
超深层
低渗透油藏
异常高压
弹性驱动
溶解气驱
水平井
永进地区
ultra-deep reservoir
low permeability reservoir
abnormal high pressure
elastic drive
solution gas drive
horizontal well
Yongjin oilfield
