准噶尔盆地腹部沙湾凹陷征10井油气相态预测  

Prediction of Oil and Gas Phase States in Well Zheng10 in Shawan Sag,Junggar Basin

作　　者：李艳霞 李志强 王小珂 薛泽伟 LI Yanxia;LI Zhiqiang;WANG Xiaoke;XUE Zewei(College of Earth Science and Engineering,Xi’an Shiyou University,Xi’an,Shaanxi 710065,China)

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065

出　　处：《西安石油大学学报(自然科学版)》2025年第2期42-48,共7页Journal of Xi’an Shiyou University(Natural Science Edition)

基　　金：国家自然基金项目“鄂尔多斯盆地上古生界致密砂岩气成岩、成藏耦合机理研究”(41372148)。

摘　　要：中国超深层油气资源丰富,探索超深层油气的特征对受高温高压等诸多因素影响的油气开采具有非常重要的意义。征10井是位于准噶尔盆地腹部沙湾凹陷的超深层油气井,完钻井深为7802 m,其附近的其他凹陷盆地地区均发现大量的可开采油气,具有极好的油气勘探潜力。首先通过Z值法、气油比法和三角图法等经验方法对征10井该井油气进行了油气藏评价,结果表明该井属于凝析气藏。在此基础上,利用实验相态软件进行了该井油气相态仿真研究,结果表明:征10井油气的临界点温度为-116.87℃,临界压力为24.41 MPa,在临界点温度(T_(c))、临界凝析温度(T_(m))、临界凝析压力(P_(m))的位置上具有显著不同特征,存在着T_(c)—P_(m)—T_(m)的排列顺序,即在临界凝析压力点的温度超过了临界温度,而小于临界凝析温度;反凝析液量较高,最大反凝析油量21.22%,凝析油含量为554.26 g/m^(3),为高含凝析油凝析气藏。征10井油气的相态预测对进一步研究盆地腹部的超深层油气分布规律具有重要指导作用。China has abundant ultra deep oil and gas resources,and exploring the characteristics of ultra deep oil and gas is of great significance for the development of oil and gas which is affected by various factors such as high temperature and high pressure.Well Zheng10 is located in the super deep oil and gas reservoir in Shawan Sag in the hinterland of the Junggar Basin,with a completed drilling depth of 7802 m.Large amounts of exploitable oil and gas have been discovered in other nearby sags,which have excellent potential for oil and gas exploration.The oil and gas reservoir of well Zheng10 is evaluated using Z-value method,gasoline ratio method,and triangle diagram method,and the results showed that the gas reservoir is a condensate gas reservoir.On this basis,the phase state of oil and gas in well Zheng10 was simulated using experimental phase simulation software.The result shows that the critical temperature of the oil and gas in well Zheng10 is-116.87℃,and the critical pressure is 24.41 MPa.The oil and gas have significantly different characteristics at the critical point temperature(T_(c)),critical condensation temperature(T_(m)),and critical condensation pressure(P_(m)).The temperature at the critical condensation pressure is higher than the critical temperature and lower than the critical condensation temperature.The amount of reverse condensate is relatively high,with a maximum reverse condensate oil content of 21.22%and a condensate oil content of 554.26 g/m^(3),making it a high content condensate gas reservoir.The prediction of the oil and gas phase states of well Zheng 10 is of important significance for further studying the oil and gas distribution law in the hinterland of the Junggar Basin.

关 键 词：超深层油气 上乌尔禾组 凝析气藏 全烃色谱法 三角图法 PT相图法 

分 类 号：TE122[石油与天然气工程—油气勘探]