德惠断陷储层保护技术研究

发布时间：2018-01-05 18:32

本文关键词：德惠断陷储层保护技术研究　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：针对德惠断陷储层特点,开展了储层损害机理和储层保护效果室内评价研究。利用岩心流动实验、分散性实验、膨胀性实验、表面张力和界面张力测试等分析手段,确定了储层损害机理是水敏损害、水锁损害和微裂缝固相侵入损害,提出了保护储层技术措施；通过室内实验对比评价,优选出了效果较好的封堵剂、水敏抑制剂和防水锁剂,并对钻井液体系进行了技术改进；在此基础上,分别利用实际储层岩心和天然露头岩心对钻井液进行了储层保护效果评价。室内评价表明,优化后的钻井液体系流变性和滤失造壁性较好,滤失量非常低,具有很好的高温稳定性；井浆的抑制性很强,抑制水化分散和抑制水化膨胀作用显著。对于极低渗透率的储层岩心,滤液侵入对储层产生极高的损害程度,但侵入深度只有20mm左右,完全可以通过射孔解除损害；对于渗透率较高的天然露头砂岩岩心,该体系具有较好的储层保护效果,侵入储层深度不超过15mm,渗透率恢复率达到93.23%。该体系在德深17井三开应用,钻井施工顺利,中途测试时成功点火,现场钻井液渗透率恢复率达到92.35%,10mm油嘴日产气5.6万方,取得了良好的效果。
[Abstract]:According to the characteristics of the reservoir in Dehui fault depression, carried out the research of evaluation mechanism and protective effect of indoor reservoir damage. Based on the core flow experiment, dispersion experiments, swelling experiment, surface tension and interfacial tension test methods to determine the mechanism of reservoir damage is sensitive to water damage, water damage and micro cracks solid invasion damage, put forward the technical measures for reservoir protection; through indoor experiments evaluation, optimized the better effect of plugging agent, water sensitive inhibitor and waterproof lock agent, and the drilling fluid system was modified; on this basis, using the actual reservoir core and outcrop core evaluation of reservoir protection the effect of drilling fluid. The indoor evaluation showed that the optimized drilling fluid rheology and filtration and wall building better, filter loss is very low, has good high temperature stability; inhibitory wells pulp strong inhibition of water Dispersion and inhibit the hydration swelling significantly. The reservoir core permeability is very low, resulting in high damage invasion on reservoir, but the invasion depth of only about 20mm, can relieve the harm by perforation; for high permeability of natural outcrop sandstone core, this system has good reservoir protection effect, invasion the reservoir depth is less than 15mm, the permeability recovery rate reached 93.23%. the system in Germany 17 deep wells three open application, drilling well, midway test successful ignition, drilling fluid permeability recovery rate reached 92.35%, 10mm Nissan gas nozzle 56 thousand, and achieved good results.

【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE258.2

【相似文献】