庆深气田火山岩地层三个压力预测技术研究

Study on Prediction Technique of Formation Pressure in Volcanic Rocks in Qingshen Gas Field

摘要:

地层孔隙压力、破裂压力和坍塌压力是合理确定井身结构、钻井液密度和固井完井方案的基本依据，是钻井工程设计的一项重要内容。分析了火山岩地层的压力预测技术，首次将国外先进的岩石力学理论应用于庆深气田火山岩地层，建立了3个压力预测模型，针对模型和庆深气田火山岩地层特性提出了新的修正方法；编制了庆深气田火山岩地层3个压力预测软件，该模型软件精度满足现场施工要求，为大庆地区钻井工程设计提供了参考。

Abstract:

Pore pressure, breakdown pressure and collapsing pressure are the bases of determining the casing programme, drilling fluid density and cementing and completion plan, and are important in the design of drilling engineering. Analysis was made on prediction technique of formation pressure in volcanic rocks, and for the first time, the advanced rock mechanics theory abroad was put into volcanic rocks in Qingshen gas field. 3 pressure prediction models were made, new correction methods were put forward according to these models and the characteristics of volcanic rocks in Qingshen gas field; 3 pieces of pressure prediction software were worded out, and the precision met the construction requests, it provides the reference for the design of drilling engineering in Daqing area.