东海气藏凝析水判别方法及产出规律研究

Identification Method and Production Law of Condensate Water of Gas Reservoir in East China Sea

王理 何贤科 廖恒杰 汪文基

WANG Li HE Xianke LIAO Hengjie WANG Wenji

中海石油（中国）有限公司上海分公司，上海　200335

Shanghai Branch, CNOOC (China) Limited, Shanghai 200335, China

凝析水是一种矿化度值很低的特殊气藏地下水，伴随着气藏的开发而产生，目前海上气藏在生产初期一般都伴生凝析水，随着温度、压力的变化，凝析水一般会在储层中或者井筒内析出，当达到一定产量规模会影响气藏产能及开发效果，因此明确凝析水的产出特征，对分析气藏的开发特征、制定合理的开发措施具有重要的意义。该文在凝析水含量测定室内实验分析的基础上，结合开发井实际生产过程中凝析水产出特征和地化指标，开展东海在产气藏凝析水判别方法及产出规律研究，最终在此基础上形成了一套实用性较强的凝析水产量预测方法，可应用于在产气藏气井凝析水产量预测，同时对类似气藏凝析水产量预测具有借鉴指导意义。

Condensate water is a kind of special gas field groundwater with very low salinity, which is produced with the development of gas reservoirs. Condensate water is usually associated with offshore gas reservoirs in the early stage of production. Condensate water generally precipitate in reservoir or wellbore along with the change of temperature and pressure. It will affect productivity and development of gas reservoir when condensate water reaches a certain amount. Therefore, for better identifying characteristics of gas reservoirs and making development measures, it is of great significance to clarify the production characteristics of condensate water. Based on the analysis of the laboratory experiment of condensate water content determination, combined with the condensate water production characteristics and geochemical indicators in the actual production process of development wells, this paper puts up the discrimination method and production law of gas reservoirs in East China Sea, which can be applied to the condensate water production prediction of gas wells in gas fields, and has reference and guiding significance for the condensate water production prediction of similar gas reservoirs.

国家科技重大专项“东海深层低渗-致密天然气勘探开发技术”（2016ZX05027004）；中海油七年行动计划科技项目（CNOOC-KJ-135-ZDXM-39-SH01）

https://doi.org/10.3969/j.issn.1008-2336.2023.02.024