珠江口盆地古近系地层三压力剖面研究

Study on three Pressure Profile of Paleogene Formation in Pearl River Mouth Basin

准确计算地层三压力是确定合理的钻井液密度和井身结构设计的基础。本文通过对地层三压力剖面预测模型的建立并结合现场测录井资料的计算来确定古近系地层三压力剖面技术预测方法,对XJ33-1-1井钻井液密度范围进行了设计,井下事故发生频率降低、耗时缩短,钻井效率得到提高,该方法为合理调整现场钻井液密度、设计钻井工程提供了理论依据,确保安全快速钻进。

Accurate calculation of three pressure formation is the basis for determining reasonable drilling fluid density and well structure design.In this paper,the prediction mechanical model of three pressure profile of paleogene formation is established,and using logging data forms the prediction method of three pressure profile of paleogene formation.Designing Drilling fluid density range for well xj33-1-1,the occurrence of downhole complex conditions can be Effectively avoided and reduced and the drilling efficiency can be improved,and It can provide scientific basis for drilling engineering design,reasonable adjustment of field drilling fluid density and safe and rapid drilling.