新疆莫116井区注水开发可行性实验评价研究

发布时间：2018-09-08 21:51

【摘要】：莫116井区位于莫北油田的南部。根据目前部署的评价井试油资料的显示,该井区油气显示活跃,采用注水开发。为了更好地开发莫北油田莫116井区的三工河组,取得良好的注水效果,现对莫116井区储层保护及注水工艺进行了研究。通过开展储层伤害评价研究,可以为科学合理开发起到指导作用,从而提高油藏的注水开发效果。本文以莫116井区油藏地质与储层特征为基础进行研究,进行了储层敏感性评价、注水可行性、注入水与地层水配伍性、粘土稳定剂筛选等一系列实验研究。通过该项目的研究,得出以下结论:该储层属于低渗低孔油藏,孔隙结构呈现出喉道半径小、孔喉直径比大、饱和度中值压力较高、面孔率和配位数低、孔隙喉道分布偏细、粘土矿物含量较低的特征现象。储层水敏、速敏、体敏、碱敏和压敏虽然均不严重,但在其剖面上分布的酸敏矿物并不均衡。预测其水驱采收率约为23%。注入水、地层水之间配伍性虽然较好,但仍需严格控制注入水中的机械杂质。在酸化和压裂的作业过程中,尽量使残渣返至地面,防止留在油井底部的残渣进入到深部地层而引起油藏的二次污染。在莫116井区的整个开发过程中,采取了注采同步开发、向注入水中连续地加入粘土稳定剂、对于非均质性强的层段实行分注等措施,应用效果较好,并证明了在莫116井区注水开发是可行的。该研究使低渗透水敏油藏在注水开采过程当中的储层伤害与储层保护措施得到了丰富,为其取得更好的注水效果提供了技术支持,同时帮助在注水过程中更好地保护储层。
[Abstract]:Well Mo 116 is located in the south of Mobei Oilfield. According to the oil test data of the evaluation well deployed at present, the oil and gas in this well area is active and developed by water injection. In order to develop the Sangonghe formation in Mo-116 well area of Mobei Oilfield and obtain good water injection effect, the reservoir protection and water injection technology in Mobei well area are studied. Through the research of reservoir damage evaluation, it can play a guiding role in scientific and reasonable development and improve the effect of reservoir water injection development. Based on the study of reservoir geology and reservoir characteristics in well Mo 116, a series of experimental studies such as reservoir sensitivity evaluation, feasibility of water injection, compatibility of injection water with formation water, and selection of clay stabilizers are carried out in this paper. Through the research of this project, the following conclusions are drawn: the reservoir belongs to low permeability and low porosity reservoir. The pore structure shows small throat radius, large pore throat diameter ratio, high median saturation pressure, low porosity and coordination number, and thin pore throat distribution. The characteristic phenomenon of low clay mineral content. Although the water sensitivity, velocity sensitivity, body sensitivity, alkali sensitivity and pressure sensitivity are not serious, the acid sensitive minerals distributed on the profile are not balanced. The water drive recovery is predicted to be about 23. Although the compatibility between formation water and injected water is good, it is necessary to strictly control the mechanical impurity in injected water. In the process of acidizing and fracturing, the residue is returned to the surface as far as possible to prevent the residue left at the bottom of the oil well from entering deep formation and causing secondary pollution of the reservoir. In the whole development process of Mo-116 well area, the measures such as simultaneous development of injection and production, continuous addition of clay stabilizer to injected water, and separate injection for the section with strong heterogeneity are adopted, and the application results are good. It is proved that water injection development is feasible in Mo 116 well area. This study enriches reservoir damage and reservoir protection measures in the process of water injection production in low permeability water sensitive reservoirs, which provides technical support for better water injection effect and helps to better protect reservoirs in the process of water injection.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357.6

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