镇原油田长81油藏储层特征与工艺改造

来源 :成都理工大学学报(自然科学版) | 被引量 : 0次 | 上传用户:lp51443712
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随着鄂尔多斯盆地镇原油田81油藏规模开发和产建区块西进,储层物性变差,单井试排、试采产量下降明显,为提高单井产量,以提高储层改造体积及改善裂缝导流能力为目标的储层改造势在必行。针对长81油藏储层发育特征,参照华庆油田长6油藏储层工艺改造成果和经验,采用斜井多段压裂、定向射孔和混合水体积压裂等新工艺对储层进行改造和适应性分析,结果表明:实施斜井多段压裂技术单井增产13.69%;实施定向射孔技术单井增产19.09%;实施混合水体积压裂技术单井增产效果最显著,可达242%。已开展的现场试验结果,证明针对储层发育特征实施的储层新工艺改造技术,对提高超低渗透油藏开发效果具有重要意义。 With the development of the size and development of the oil and gas reservoirs in the Zhenyuan Oilfield, Ordos Basin, the physical properties of the reservoirs have deteriorated and single well test and discharge have been drastically declined. Production of test wells has been obviously decreased. In order to increase the single well production volume, Reservoir improvement aimed at improving fracture conductivity is imperative. According to the development characteristics of reservoirs in Chang 81 reservoir and referring to the achievements and experiences in the process reformation of reservoirs in Chang 6 reservoir in Huaqing Oilfield, new reservoirs are reconstructed by multi-stage fracturing, directional perforation and mixed water volume fracturing The results show that the single-well production increase by 13.69% in inclined shaft multi-section fracturing technology and 19.09% by directional perforation technology. The single well production with mixed-water volume fracturing is the most obvious, up to 242% . The field test results that have been carried out proves that the new technology of reservoir recovery for reservoir development features is of great significance for improving the development effect of ultra-low permeability reservoirs.
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