渤海油田大尺寸优势通道封堵剂性能评价

发布时间：2018-04-06 07:07

本文选题：大尺寸优势通道　切入点：固化时间　出处：《油气地质与采收率》2017年06期

【摘要】：与陆上油田相比,渤海油田在储层地质特征、注采参数和完井方式等方面存在较大差异。为解决渤海油田注入液窜流技术难题,以渤海油田储层和流体为实验平台,开展封堵剂组成筛选和性能评价实验研究。结果表明,封堵剂是由主剂与增粘剂、固化剂和缓凝剂等组成的灰黑色致密固体,具有较高的抗压强度和较低的渗透性,是一种大尺寸优势通道封堵材料。封堵剂溶剂水总矿化度与固化时间相关性不大,但溶剂水中的CO_3~(2-)和HCO_3~-有益于延缓固化时间。从技术经济角度考虑,主剂质量分数不低于30%,缓凝剂质量分数为0.05%~0.1%。通过调节缓凝剂用量,可以满足矿场施工时间要求。当封堵剂组成为质量分数为5%的增粘剂+质量分数为0.15%的固化剂+质量分数为0.1%的缓凝剂+质量分数为30%的主剂时,其固化时间约为20 h。
[Abstract]:Compared with onshore oil fields, there are great differences in reservoir geological characteristics, injection-production parameters and completion methods in Bohai Oilfield.In order to solve the technical problem of injection fluid channeling in Bohai Oilfield, an experimental study on sealing agent composition screening and performance evaluation was carried out on the platform of reservoir and fluid in Bohai Oilfield.The results show that the plugging agent is a dense gray solid composed of main agent, tackifier, curing agent and retarder, which has high compressive strength and low permeability, and is a large size superior channel plugging material.The total salinity of the plugging agent solvent water has little correlation with the curing time, but the CO _ (3) and HCO _ (3) in the solvent water are beneficial to delay the curing time.From the point of view of technology and economy, the mass fraction of main agent is not less than 30, and the mass fraction of retarder is 0.05% and 0.1% respectively.By adjusting the dosage of retarder, it can meet the requirement of construction time.When the mass fraction of the plugging agent is 5%, the mass fraction of tackifier is 0.15%, the mass fraction of curing agent is 0.1%, the mass fraction of retarder is 30%, the curing time is about 20 h.
【作者单位】：东北石油大学提高油气采收率教育部重点实验室;中海石油(中国)有限公司天津分公司研究院;
【基金】：国家科技重大专项“渤海双高油田多级窜逸堵调驱一体化技术研究及示范”(2016ZX05058-003-010) 中海石油(中国)有限公司天津分公司重点攻关课题“无机复合地质聚合物凝胶调堵技术及其配套方法研究”(CCL2016TJTJLST0676)
【分类号】：TE53

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