【作者】 潘景宇；

【导师】 谭成仟；

【作者基本信息】 西安石油大学 ， 矿物学、岩石学、矿床学， 2024， 硕士

【摘要】 陕西省吴起油田X255区位于鄂尔多斯盆地中部伊陕斜坡。随着油藏开发的深入,开发效果逐渐变差。亟需围绕吴起油田X255区存在的问题展开开发调整技术政策研究,为后续科学可持续开发提供依据。通过对吴起油田X255区进行包括地层对比划分、沉积微相和砂体展布特征及储层特征在内的地质特征和包括油藏开发历程、油藏产能特征及见水见效特征在内的生产开发动态特征的研究。明确了吴起油田X255区面临包括长6油藏储层品质差、油水关系复杂、物性较差以及单井日产油偏低等矛盾,导致吴起油田X255区目前开发效果较差。明确目前吴起油田的开发矛盾,本文通过建立建模数模一体化模型,模拟注水见效区的开发效果,并明确了研究区剩余油的分布规律。基于上述分析结果,针对已动用区块提出油水井补孔、提液和周期注水等调整措施,同时考察当前井网布局,确立适宜的井距、排距及注水量,并探讨合理采油速率、注水强度、井底流压和注采比等技术参数,最终提出一套合理的开发调整方案,旨在提高吴起油田X255区主力层长6油藏井组石油采收率。更多还原

【Abstract】 X255 area of Wuqi Oilfield in Shaanxi Province is located in Yishan slope in the middle of Ordos Basin.With the depth of reservoir development,the development effect becomes worse gradually.It is urgent to study the development adjustment technology policy around the problems existing in X255 area of Wuqi Oilfield,so as to provide the basis for the scientific and sustainable development.The X255 area of Wuqi Oilfield is studied in terms of geological characteristics,including stratigraphic correlation division,sedimentary microfacies,sand body distribution and reservoir characteristics,and dynamic characteristics of production and development,including reservoir development history,reservoir productivity and water-finding response characteristics.It is clear that X255 area of Wuqi Oilfield is faced with such contradictions as poor reservoir quality of Chang 6 reservoir,complex oil-water relationship,poor physical property and low daily oil production per well,which leads to poor development effect at present.In this paper,the development contradiction of Wuqi oilfield is clarified.By establishing the integrated modeling model,the development effect of waterflood response area is simulated,and the distribution law of remaining oil in the study area is clarified.Based on the above analysis results,adjustment measures such as borehole repair,liquid extraction and periodic water injection are proposed for the used blocks.At the same time,the current well pattern layout is investigated,appropriate well spacing,row spacing and water injection volume are established,and technical parameters such as reasonable oil recovery rate,water injection intensity,bottom hole flow pressure and injection-production ratio are discussed.Finally,a reasonable development adjustment plan is proposed.The aim is to improve the oil recovery efficiency of well group of Chang 6 reservoir in X255 area of Wuqi Oilfield.更多还原