渤南中深层沙河街层系轻质油密闭取心井饱和度校正实验研究

Experimental Study on Saturation Correction for Sealed Core Wells of Light Oil Reservoir in Shahejie Formation in Bonan

罗宪波 李金宜 段宇 周凤军 王冰月

LUO Xianbo LI Jinyi DUAN Yu ZHOU Fengjun WANG Bingyue

中海石油(中国)有限公司天津分公司渤海石油研究院, 天津 300459

Bohai Oilfield Petroleum Research Institue of CNOOC CHINA Ltd. Tianjin, Tianjin 300459, China

密闭取心油水饱和度测试结果与地层真实情况存在偏差，必须进行饱和度校正。以渤海油田渤南区域沙河街层系具有较高气油比的轻质油藏密闭取心井为例，通过室内实验模拟了地层条件下降压脱气过程和孔隙压实过程，并综合考虑了含水饱和度测定方法的误差影响。实验结果表明：孔隙压实损失 > 降压脱气损失 > 测试方法损失。根据实验结果，建立了该类型轻质油藏密闭取心井地层油水饱和度校正公式，通过校正实测含水饱和度，计算得到储层条件下的真实油水饱和度数据。利用校正后的油水饱和度资料可以有效指导油气田开发工作。

The oil-water saturation of sealed core wells should be corrected due to the offset between test results and real conditions. The sealed core wells of light oil reservoir which have high gas-oil ratio in Shahejie formation in Bonan can be taken as an example. Laboratory experiments are carried out to simulate the degasification process and pore compaction. The influence of the error on the measurement method of water saturation is also considered. The experiment results show that saturation loss caused by pore compaction is greater than that casued by degasification, and the loss due to test methods is minimal. According to the experimental results, the saturation correction formula of the sealed core wells in this type of light oil reservoir is established. The measured water saturation is corrected to obtain the true reservoir oil-water saturation data. It can be used to guide the development of oil field effectively by using the corrected oil-water saturation data.

国家科技重大专项“渤海油田加密调整油藏工程技术研究”（编号：2016ZX05025-001-007）。

https://doi.org/10.3969/j.issn.1008-2336.2019.02.067