东部陆相断陷盆地近年探井失利主要因素分析

中国东部油气探井主要分布在资源丰度高、面积大的断陷盆地中,层系上以古近系为主,深度上以中深层为主,油藏类型上非构造圈闭已占主导地位。探井失利原因可归纳为油气源因素、储层因素、圈闭与保存因素、工程因素和其他因素等5个方面。研究近3年的失利井,认为圈闭与保存条件因素是造成探井失利的主要原因;其次是储层因素,其他因素影响较小。针对复杂的岩性圈闭、低幅度构造、复杂小断块和深层构造圈闭目标,需要开展提高地震资料信噪比和分辨率的采集技术攻关和储层预测技术攻关。

Main Factors Analysis of Exploration Failure in Terrestrial Rifted Basins in the East in Recent Years

Oil and gas exploration wells concentrate in the rifted basins with high hydrocarbon enrichment and large area in east China.They are mainly distributed in the medium-deep strata of Paleogene,and nonstructural traps take the dominant.It is concluded that the exploration failure is caused by hydrocarbon sources,reservoirs,traps and their preservation,engineering,and etc..Research on exploration failure in the past three years shows that the main cause is the traps and their preservation,reservoirs take the s...