大庆石油地质与开发2011，Vol.30Issue(1)：58-62,5.DOI:10.3969/J.ISSN.1000-3754.2011.01.011
疏松砂岩油藏密闭取心含水饱和度校正方法
CORRECTION METHODS FOR WATER SATURATION OBTAINED BY SEALED CORING FROM UNCONSOLIDATED SAND RESERVOIRS
摘要
Abstract
Using the data from sealed coring wells is the most direct and effective way to analyze oil and water saturations currently. However, due to the influences of raising cores and invasion of drilling fluid, the oil and water saturations obtained by core testing from the main oil-bearing layer system ( the upper member of Guantao Formation and the upper part of Sha No. 2 Member) of Shengli Oilfield are only 75％ -85％, therefore corrections are needed to get accurate saturations. Aiming at the development of unconsolidated sand reservoirs, the laboratory experiments on processes of volatilization and raising core are conducted, in which volatilization, porosity change, decompression and degasification, and drilling fluid invasion corrections are conducted respectively according to the coring process of "going upstream" . The correction results show that the process of raising core leads to the largest loss of oil and water saturations with the water saturation loss of 13.7％ and the oil saturation loss of 6. 5％. Meanwhile,the influence of drilling fluid invasion on oil and water saturations should be considered during coring from unconsolidated sand reservoirs, and the oil and water saturations of completely and strongly invaded samples should be corrected.关键词
密闭取心井/饱和度损失/挥发校正/降压脱气校正/钻井液侵入校正Key words
sealed coring well/ saturation loss/ volatilization correction/ decompression and degasification correction/ drilling fluid invasion correction分类
医药卫生引用本文复制引用
辛治国,冯伟光,郭士博,李路晨,孙志刚..疏松砂岩油藏密闭取心含水饱和度校正方法[J].大庆石油地质与开发,2011,30(1):58-62,5.基金项目
国家重大科技专项"大型油气田及煤层气开发"子课题"高温高盐油藏精细三维地质建模及开发优化调控技术"(2008ZX05011-03)资助. （2008ZX05011-03）
