疏松砂岩复杂压力储集层保护技术
发布时间：2018-10-16 19:46
【摘要】：渤海某油田经过多年注水开发,疏松砂岩储集层呈现局部压力系数低、层间差异大的特点,储集层保护难度大。目前国内外针对疏松砂岩储集层出砂机理及防砂措施研究较多,而针对疏松砂岩复杂压力体系调整井钻井液及钻井优化技术研究不足。基于此,针对该油田开发情况,结合疏松砂岩和地层压力复杂的特点,开展了储集层伤害机理研究,利用室内实验进行了钻井液体系优化研究并优化设计了钻井施工工艺。结果表明:钻井阶段储集层损害的主要原因为黏土吸水膨胀、外部或内部固体颗粒运移堵塞孔喉或孔隙导致渗透率降低,以及施工工艺不完善等;使用胺基硅醇、LPF-ZP-HTC复配能提高钻井液的抑制性和封堵承压能力;并通过施工工艺的优化研究,形成了一套疏松砂岩复杂压力储集层保护技术。渤海油田现场试用情况表明,该技术的应用能够实现易造浆井段的流变稳定、提高起钻速率、缩短建井周期及提高单井产量。
[Abstract]:After many years of water injection development in a certain oilfield in Bohai Sea, the loose sandstone reservoir presents the characteristics of low local pressure coefficient and great difference between layers, and it is difficult to protect the reservoir. At present, there are many researches on sand production mechanism and sand control measures for loose sandstone reservoir at home and abroad, but insufficient research on drilling fluid and drilling optimization technology for the adjustment of complex pressure system of loose sandstone. Based on this, according to the development of the oilfield, combined with the characteristics of loose sandstone and complex formation pressure, the reservoir damage mechanism was studied, and the drilling fluid system optimization and drilling construction technology were optimized by laboratory experiments. The results show that the main causes of reservoir damage in drilling stage are water absorption and expansion of clay, permeability decrease due to external or internal solid particle migration, plugging pore throat or pore, and imperfect construction technology. Using amino-silyl, LPF-ZP-HTC compound can improve the inhibition and plugging capacity of drilling fluid, and through the optimization research of construction technology, a set of complex pressure reservoir protection technology for loose sandstone is formed. The field trial in Bohai Oilfield shows that the application of this technology can realize the rheological stability of the section of easy slurry production, improve the drilling rate, shorten the construction period and increase the production rate of single well.
【作者单位】： 中海石油(中国)有限公司天津分公司;西南石油大学石油与天然气工程学院;
【基金】：国家科技重大专项“复杂压力体系油藏钻完井全过程储层保护技术”(2011ZX05057-002-002)
【分类号】：TE258
本文编号：2275445
[Abstract]:After many years of water injection development in a certain oilfield in Bohai Sea, the loose sandstone reservoir presents the characteristics of low local pressure coefficient and great difference between layers, and it is difficult to protect the reservoir. At present, there are many researches on sand production mechanism and sand control measures for loose sandstone reservoir at home and abroad, but insufficient research on drilling fluid and drilling optimization technology for the adjustment of complex pressure system of loose sandstone. Based on this, according to the development of the oilfield, combined with the characteristics of loose sandstone and complex formation pressure, the reservoir damage mechanism was studied, and the drilling fluid system optimization and drilling construction technology were optimized by laboratory experiments. The results show that the main causes of reservoir damage in drilling stage are water absorption and expansion of clay, permeability decrease due to external or internal solid particle migration, plugging pore throat or pore, and imperfect construction technology. Using amino-silyl, LPF-ZP-HTC compound can improve the inhibition and plugging capacity of drilling fluid, and through the optimization research of construction technology, a set of complex pressure reservoir protection technology for loose sandstone is formed. The field trial in Bohai Oilfield shows that the application of this technology can realize the rheological stability of the section of easy slurry production, improve the drilling rate, shorten the construction period and increase the production rate of single well.
【作者单位】： 中海石油(中国)有限公司天津分公司;西南石油大学石油与天然气工程学院;
【基金】：国家科技重大专项“复杂压力体系油藏钻完井全过程储层保护技术”(2011ZX05057-002-002)
【分类号】：TE258
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