井楼油田复杂井固井技术

Cementing Technology for Complex Hole in Jinglou Oilfield

井楼油田稠油油藏埋深浅,稠度大,需进行蒸汽吞吐才能开采。由于长期注水、注汽开采,导致地层水十分活跃,井下动态干扰大,在钻进过程中经常发生溢流、井涌、气窜,影响固井质量。采用管外封隔器工艺与快凝早强膨胀水泥浆体系,并配合其他固井技术措施如用低密度水泥浆替代“清水”用作冲洗液、采用小排量进行替浆和优化固井设计相结合,有效地解决了井楼油田稠油浅井复杂井的固井质量差的难题。

Heavy oil had a high consistency and a shallow buried depth in Jinglou oilfield so that the steam huff and puff had to be deployed. Very active formation water as a result of water and steam injection for a long period led to heavily dynamic disturbing downhole. Overflow, kicking and gas breakthrough frequently occurred in the drilling progress and thus gave an impact on the cementing quality. Combined with other cementing technologies, such as not fresh water but the low density slurry employed as the circ...