杏76区块扶余油层井网适应性评价及开发指标预测

发布时间：2018-05-04 15:10

本文选题：低孔特低渗透油藏 + 地质建模　；参考：《东北石油大学》2017年硕士论文

【摘要】：杏76区块扶余油层属于低孔、特低渗岩性油藏,针对其河道规模较小,连通性不好,平面砂体转化快、连通性差、单砂厚度薄等特点,采用三维可视化地质建模及油藏数值模拟软件,研究适于低孔、特低渗油藏的建模数模方法,在提高开发效果和指导开发调整方面起到关键性的作用。利用petrel地质建模软件,根据研究区地震解释、层位、断层、相数据等,以及油藏孔、渗、饱数据,结合油藏非均质性、相分布特征,利用相内插值技术,合理地划分流体性质及相对渗透率,最终完成三维地质模型的建立,包括断层模型、构造模型、相模型、属性模型等。将地质模型导入数值模拟软件中,经参数调整完成历史拟合。总结纵向、横向剩余油分布特征,量化各小层、微相剩余油情况。截止至2016年9月,扶余油层总采油量为1.45×104t,综合采出程度为1.43%。根据纵向、横向量化结果来看,FI、FⅡ两油层组相较其他油层组来说动用程度较好,河道微相采出程度为1.75%。分别从动用特征、含水变化规律、产液变化规律、水驱特征曲线、合理注采井数比、井网控制程度及开发指标预测对比等多角度开展井网适应性分析,认为杏76试验区扶余油层井网水驱开发的适应性良好。针对该井网开展地层压力保持水平、合理注采速度等开发政策界限的研究,确定合理的注采速度等。应用数值模拟预测的方法,开展水驱开发10年及极限含水率情况下的开发指标预测。预测十年累产油量为13.89×104t,综合含水率达到92.52%,采收率达到13.73%。预测生产25年及达到极限含水率时,累产油量达到23.96×104t,综合含水率达到98%,采收率达到23.69%。
[Abstract]:Fuyu reservoir in Xing76 block belongs to low porosity and low permeability lithologic reservoir. Aiming at its small river scale, poor connectivity, fast transformation of planar sand body, poor connectivity and thin thickness of single sand, etc. By using 3D visualization geological modeling and reservoir numerical simulation software, the mathematical modeling method suitable for low porosity and ultra-low permeability reservoir is studied, which plays a key role in improving the development effect and guiding the development adjustment. According to seismic interpretation, horizon, fault, facies data, pore, permeability and saturation data of reservoir, combined with reservoir heterogeneity and phase distribution characteristics, the technique of interphase interpolation is used in this paper, which is based on petrel geological modeling software, and based on seismic interpretation, horizon, fault, facies data, and reservoir pore, permeability and saturation data in the study area. The establishment of 3D geological model including fault model, tectonic model, facies model, attribute model and so on is completed by reasonably dividing the fluid properties and relative permeability. The geological model is imported into the numerical simulation software, and the historical fitting is completed by adjusting the parameters. The distribution characteristics of longitudinal and transverse residual oil are summarized and the residual oil in each layer and microphase is quantified. As of September 2016, the total oil production of Fuyu reservoir is 1.45 脳 10 ~ (4) t, and the comprehensive recovery degree is 1.43. According to the results of longitudinal and horizontal quantification, it is found that the two reservoirs of FII FII are more productive than other reservoir groups, and the recovery degree of channel microfacies is 1.75. The adaptability analysis of well pattern is carried out from production characteristics, variation law of water cut, variation law of production fluid, characteristic curve of water drive, reasonable ratio of injection-production well number, control degree of well pattern and prediction and comparison of development index, etc. It is considered that the well pattern of Fuyu reservoir in Xing76 experimental area has good adaptability to water drive development. Aiming at the development policy limits of formation pressure maintaining level and reasonable injection-production speed, the reasonable injection-production speed is determined. Using the method of numerical simulation and prediction, the development index prediction under the condition of water drive development for 10 years and limit water cut is carried out. The predicted cumulative oil production for ten years is 13.89 脳 10 ~ (4) t, the comprehensive water cut is 92.52 ~ (2) and the recovery factor is 13.73%. The cumulative oil production is 23.96 脳 10 ~ (4) t, the comprehensive water cut is 98% and the recovery factor is 23.6990 t when the production is 25 years and the limit water cut is reached.
【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】：TE319

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