压力恢复曲线在压井液密度优化中的应用  

APPLICATION OF PRESSURE BUILD-UP CURVE IN HIGH-PRESSURE,LOW-PERMEABILITY RESERVOIR WELL KILLING FLUID DENSITY OPTIMIZATION PROCESS

作　　者：苗国政[1] 王仙仙[1] 吴建福[1] 吴国罡[1] 陈宇家[1] 沈世波[1] 宋宪邦[1] 

机构地区：[1]中国石化玉门油田分公司,甘肃玉门735200

出　　处：《西南石油学院学报》2005年第5期51-52,67,共3页Journal of Southwest Petroleum Institute

摘　　要：由于高压低渗裂缝性储层导压能力较弱,关井后压力恢复缓慢,因此根据地层压力确定的压井液密度偏高、易造成储层污染,通过对储层压力恢复速度进行分析,确定出适用于不同压力恢复速度和施工周期的压井液密度,现场应用后取得了较好的油层保护效果和经济效益,并为同类储层压井液密度的选择提供了良好的借鉴。Because of weak pressure conductive ability in high-pressure and low-permeability reservoir,pressure builds up slowly when the oil well shut down,and well killing fluid density,according to formation pressure,is higher,resulting in formation damage.In this article,through analyzing pressure build-up speed of the reservoir,the writer determines the appropriate well killing fluid densities which are suitable for different pressure build-up speed and operating cycle.Great effects and economic benefit have been achieved by in-site application,and the reference can be provided for the well killing fluid density optimization in the similar reservoirs.

关 键 词：高压低渗 压降漏斗 压力恢复 压井液密度 施工周期 

分 类 号：TE257.9[石油与天然气工程—油气井工程]