海上少井条件下含水率计算方法研究及应用

Study and Application on Computing Method of Water Conent with Little Well Data in Offshore Fields

魏锋 陈现 王迪 夏瑜

WEI Feng CHEN Xian WANG Di XIA Yu

中国石油化工股份有限公司上海海洋油气分公司勘探开发研究院，上海　200120 中国石油化工股份有限公司石油勘探开发研究院无锡石油地质所，江苏无锡　214126 中国石油化工股份有限公司西南油气分公司勘探开发研究院，四川成都　610041 中海石油（中国）有限公司上海分公司，上海　200335

Institute of Exploration and Development, SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120, China Wuxi Research Institate of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China Institute of Exploration and Development, SINOPEC Southwest Oil & Gas Company, Chengdu, Sichuan 610041, China Shanghai Branch of CNOOC (China) Ltd., Shanghai 200335, China

如何识别储层的流体性质对生产起着至关重要的指导作用，尤其是海上油田由于缺少资料，如何评价储层的流体性质是一大难点。目前，利用测井资料来判别储层的流体性质通常使用双饱和度法即含水饱和度和束缚水饱和度的之差来进行判别。事实上，油层是否出水，不仅与含水饱和度和束缚水饱和度有关，还与储层中流体的相对渗透率和黏度有一定关系。该文结合测井资料与油层物理学，在电阻率较低的含水油层，利用含水率这个指标来判别储层油水的产出比，取得较好的效果。利用该方法来识别储层的流体性质具有重要意义，能为油田的完井与生产奠定坚实的基础。

Reservior fluids properties identification plays an important role in production, especially for offshore oil fields which usually are lack of well logging data. The difference between water saturation and the irreducible water saturation calculated by logging data is generally used to identify reservoir fluids properties. In fact, whether the reservoir produces water or not depends not only on the water saturation and the irreducible water saturation, but also on the relative permeability and viscosity of fluid in reservoirs. In this paper, the method of using water content calculated by logging data and petrophysics to evaluate the output ratio of oil and water of the reservoir is proved to be effective. This method has a great significance to identify the fluid property of the reservoir and can lay a solid foundation for oilfield completion and production.

https://doi.org/10.3969/j.issn.1008-2336.2022.04.063