储层保护型修井液技术系列的研究及应用

从储层伤害的机理出发,结合修井液的特点对其造成的储层敏感性伤害进行了分析,分别从减少修井液的固相和液相伤害进行了体系构建。结合实验研究研制出了封堵性能好、抑制性强、易返排、储层保护效果优异的修井液技术体系及配套完井液;并以南海西部乐东15-1气田为目标区块进行了现场应用。结果表明,该技术系列能够有效地保护油气层,提高修井作业后的产量恢复效率,效果十分显著。

Study and Application of protecting formation workover fluids technical systems

From the mechanism of reservoir damage , according to the analysis of characteristics of workover fluid for reservoir sensitivity, this paper construct a protecting formation workover fluids derived from reducing solid and fluid phases damage relatively. The experimental research result indicated that this systems have a good sealing performance, strongly inhibition performance, easy flowback and excellent reservoir protection technology during workover process,combined with the application of LD15-1 as target oilfield district, field application results show that the system can effectively protect the reservoir, promptly enhance the production rate after operation.