稀油油藏密闭取心流体饱和度校正方法  

Fluid Saturation Correction Method for Sealed Coring Wells in Thin Oil Reservoirs

作　　者：朱永贤 姚帅旗 张彦斌 韩继凡 赵瑞明[2] ZHU Yongxian;YAO Shuaiqi;ZHANG Yanbin;HAN Jifan;ZHAO Ruiming(Research Institute of Exploration and Development,Tuha Oilfield Company,PetroChina,Hami,Xinjiang 839009,China;Experimental Testing Technology Center,Northwest Oilfield Company,Sinopec,Urumqi,Xinjiang 830011,China)

机构地区：[1]中国石油吐哈油田分公司勘探开发研究院,新疆哈密839009 [2]中国石化西北油田分公司实验检测技术中心,乌鲁木齐830011

出　　处：《新疆石油地质》2023年第3期359-364,共6页Xinjiang Petroleum Geology

基　　金：中国石油科技重大专项(2017E-0407)。

摘　　要：针对吐哈盆地稀油油藏地层条件下的流体饱和度,以温米油田和鄯善油田丰富的密闭取心资料为基础,通过物理模拟对照实验,模拟取心过程中降压、脱气、蒸发损失等对岩心流体饱和度的影响,建立了适用于吐哈盆地稀油油藏的密闭取心流体饱和度校正模型。明确了降压脱气损失界限,即初始含水饱和度大于88%或小于33%时,降压脱气损失微弱,可忽略不计。新模型还考虑了孔隙体积变化、饱和度实验抽提损失以及不同水淹条件下的蒸发损失对饱和度测量的影响,有效提高了校正精度,与测井解释含油饱和度比较,误差为0.17%。To determine the fluid saturation under the formation conditions of thin oil reservoirs in the Turpan-Hami basin,based on the da-ta of sealed coring in the Wenmi oilfield and Shanshan oilfield,physical simulation control experiments were performed to simulate the in-fluences of depressurized degassing and evaporation losses on core fluid saturation during coring,and then a fluid saturation correction model suitable for sealed coring of thin oil reservoirs in the Turpan-Hami basin was established.The limit of depressurized degassing loss is clarified,that is,when the initial water saturation is greater than 88%or less than 33%,the depressurized degassing loss is weak and neg-ligible.The new model also takes into account the effects of pore volume change,extraction loss in saturation experiments,and evaporation loss under different flooding conditions on saturation measurement,effectively improving the correction accuracy.The error between the oil saturation derived from the model and that from logging interpretation is 0.17%.

关 键 词：吐哈盆地 稀油油藏 密闭取心 含水饱和度校正 物理模拟 降压脱气 蒸发损失 

分 类 号：TE311[石油与天然气工程—油气田开发工程]