摘要
地层破裂压力是钻井液密度确定、井身结构和压裂设计施工的基础数据。孔隙性地层的渗透性具有较强的应力敏感性,井筒流体的流体力学特性及泵入排量影响井周地层渗流压力和地层应力分布,从而决定着井筒流体渗入地层的流量和沿程摩阻。考虑应力敏感性渗流对井口记录的破裂压力的影响,建立了孔隙性地层破裂压力的解释模型。该模型能成功利用压裂资料解释破裂压力,为地应力解释打下基础。
Fracturing pressure in formations was the basic data for designing mud weight,well profile and hydraulic fracturing.The permeability of pore formations had the property of strong stress sensitivity.The permeable stress and wellbore stress,which was dependent on fluid mechanical property and pump rate of wellbore fluid,determinated the penetration rate of wellbore fluid and tube frictional drag.Based on the influence of stress sensitivity on the logging surface fracturing pressure,an interpretation model for pore formations is established.The model is successfully used to interprete the fracturing pressure according to the data of hydraulic fracturing,and provide the base of in-situ stress interpretation.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2007年第4期111-113,共3页
Journal of Oil and Gas Technology
基金
国家自然科学基金项目(50304010)
关键词
破裂压力
应力敏感性
渗流
孔隙性地层
沿程摩阻
fracturing pressure
stress sensitivity
high permeability
pore formation
friction drag
