莺琼盆地高温高压井气测录井特征研究

The Characteristics of Gas Logging for High Temperature and High Pressure Gas Wells in Yingqiong Basin

摘要: 莺琼盆地是一个高温高压广泛分布的盆地，油气水关系复杂，给钻井作业带来一定的困难和风险。针对该现状，通过气测录井的影响因素分析，总结出莺歌海盆地的4种明显的气测录井特征，即油气层全烃特征、皮克斯勒–三角图版特征、单根气特征和后效气特征。实践表明，利用上述特征可以对该区高温高压井进行准确评价，为钻井作业中准确判断井下情况提供有效依据。

Abstract: Yingqiong Basin was a basin with wide distribution of high temperature and high pressure, where oil and gas relation was complex, it induced certain difficulty and risk for well drillings. In allusion to the present situation, by analyzing the influential factors from gas logging, 4 types of evident gas logging characteristics in Yingqiong Basin were summarized, which included the total hydrocarbon characteristics of oil and gas reservoir, the characteristics of Pickser-Triangle Chart, the characteristics of single pipe gas and the characteristics of after-effect gas. Practice indicates that the above characteristics can be used for an accurate evaluation of HTHP gas wells and provide an effective basis for accurately judging downhole conditions in drilling operations.