摘要
针对低渗透露头岩芯进行了实弹射孔实验,对射孔孔眼穿透深度、孔眼周围渗透率变化情况进行了分析。结果表明:孔眼周围的渗透率变化规律和常规地层不同,沿孔眼轴线方向,渗透率呈单调下降趋势,孔眼末端的渗透率接近于原始值;在沿孔眼径向方向,渗透率也呈下降趋势,压实带特征不明显,且压实带部位的渗透率仍明显大于岩石原始渗透率;低渗透岩石射孔孔眼穿透深度明显比常规储层中小。由于常规射孔技术对低渗透储层的改造深度有限,应大规模推广采用复合射孔等新技术以改善射孔效果。
Some tests have been done on the outcrop cores with actual shaped charges.The penetration and the permeability distribution around the perforated holes have been analyzed and the results are different from the routine formation.The permeability decreases gradually along the hole axis and becomes equal to the original value at the end of hole.The permeability also decreases along radial direction of the hole.Furthermore,the crush zone is not very clear and the permeability in the special area is higher than the original value.Besides,the penetration in the tested core is lower greatly than that in routine reservoir.Because the routine perforation technology is limited to improve the low permeability reservoir,the propellant perforation technology should be applied widely to improve the effect.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第1期102-106,16,共5页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家重点基础研究发展计划(2010CB226704)
中国石油科技创新基金研究项目(2009D-5006-03-09)
关键词
低渗透
射孔
射孔弹
实验
复合射孔
low permeability
perforation
shaped charge
test
propellant perforation
