密闭取心饱和度正演分段插值校正方法  

Saturation correction for sealed coring samples based on piecewise interpolation with forward method

作　　者：付敏杰 李伟 王亚会 陈维华 伍文明 FU Minjie, LI Wei, WANG Yahui, CHEN Weihua ,WU Wenming(CNOOCChina Limited, Shenzhen Branch, Shenzhen, Gaangdong 518054, Chin)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518054

出　　处：《中国海上油气》2018年第2期107-111,共5页China Offshore Oil and Gas

基　　金：中海石油(中国)有限公司深圳分公司综合科研项目"X油田采收率影响因素及极限采收率预测(编号:CCL2013SZPS0670)"部分研究成果

摘　　要：密闭取心作业受到地层、井筒和地面环节等因素的影响,实验室测定油、水饱和度值往往偏低,有必要开展饱和度校正方法研究。综合考虑岩心压敏效应、流体体积变化及脱气排液等因素对饱和度的影响,遵循物质守恒定律,以体积为单位计算岩心从地下至地面的油水相损失总量;充分考虑储层物性品质对相渗形态的影响,精细相渗分类;最终基于相渗分流理论和分段插值原理,提出密闭取心正演分段插值饱和度校正方法。该方法已在南海东部X油田B井成功应用,在不同物性品质油藏中都展现出很好的校正准确度和解释精度,对剩余油分布研究及后续潜力挖潜具有指导意义。For the sealed coring is subject to the influences from formation,well bore and ground,the laboratory data for oil/water saturation of sealed coring samples is usually lower than actuals.Therefore,it is necessary to carry out study on the saturation correction method for sealed coring samples.Considering the influences on saturation from pressure-sensitive effect of pore volume,variation of fluid volume and degasification,a new saturation correction method for sealed coring samples based on piecewise interpolation with forward method was proposed on the combination of the theory of seepage and interpolation,in which the oil/gas loss of the core from downhole to ground was calculated by volume following rule of mass conservation,and fine phase permeability curve classification was introduced on account of the influence of physical property on phase permeability.This new method has been successfully applied in Well B of X oilfield in eastern South China Sea,and the results showed good accuracy and precision in reservoirs with different physical properties.It can provide reference for the study on the distribution of remaining oil and the exploration of potential reserves.

关 键 词：密闭取心 误差分析 饱和度校正 精细相渗分类 正演分段插值 

分 类 号：TE311[石油与天然气工程—油气田开发工程]