轻质油藏密闭取芯饱和度校正新方法  

A New water Saturation Correction Method for Closed Coring Light Oil Reservoir

作　　者：汪瑞宏 李兴丽 崔云江 

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《西安石油大学学报（自然科学版）》2018年第1期33-38,共6页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家科技重大专项"海上大井距多层合采复杂水淹层测井定量解释和评价技术研究与应用"(2011ZX05057-001-002)

摘　　要：为定量评价室内岩心测量的油、水饱和度与地层条件下的差异,寻求适合渤海油田轻质油藏密闭取芯饱和度的校正方法,选取部分密闭取芯样品对降压脱气过程进行模拟,分析了造成密闭取芯饱和度损失的主要因素,基于常用的数理统计和物理模拟实验方法,提出了可动水降压脱气校正方法,就储层中可动水部分对饱和度的影响进行校正。结果表明,采用该方法可使密闭取芯含油饱和度平均增加约5%,校正结果与储层的电性和物性有较好的对应关系。A method for correcting the sealed coring saturation of light oil in Bohai oilfield is proposed in order to quantitatively evaluate the differences of oil/water saturation between under formation conditions and under indoor measurement conditions. Select the part of the sealed coring samples to finish degassing process simulation,the main factors causing the sealed coring saturation loss are analyzed,the movable water depressurization degassing correction method is proposed based on the commonly mathematical statistics and physical simulation experiment,and the influence of the movable water in reservoir on the oil/water saturation is corrected. The results show that the oil saturation in sealed coring can be increased by about 5 percentage points on average by using the correction method,and the correction results are in good correspondence with the electrical and physical properties of reservoirs.

关 键 词：密闭取芯 降压脱气 轻质油藏 物理模拟 

分 类 号：TE311[石油与天然气工程—油气田开发工程]