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随着油田开发的深入,井网愈趋复杂、开发方式多样,套损井越来越多。分析标准层套损井产生原因,主要与油页岩进水局部区域压差大、压力梯度变化快,油页岩进水形成高压浸水域,使剪切位移加剧有关;对标准层套损井采取“关、控、查”措施,切断进水源头。而油层部位套损主要受砂体发育状况、固井质量及油层憋压影响,防控措施以降低注水压力、控制注水强度为主。
With the deepening of the oilfield development, the well network has become more and more complex, diversified development methods and more and more casing damage wells. Analysis of the causes of casing damage in the standard formation mainly involves the large pressure drop in the local area of inflow of oil shale, the rapid change of pressure gradient and the infiltration of oil shale into the high pressure soaked area, which aggravates the shear displacement; Take “off, control, check ” measures to cut off the water source. The casing damage is mainly affected by sand body development status, cementing quality and reservoir pressure suppression, prevention and control measures to reduce the injection pressure, the main control of water injection strength.