两驱压力系统在三次采油过程中动态变化特点研究
发布时间：2018-12-17 13:11
【摘要】：针对大庆萨中油田聚合物驱、三元复合驱规模不断扩大,同时水、聚、三元干扰现象日益明显,由三者引起的地层压力变化导致地层压力分布不均、地层存在异常压力区等问题也越来越突出。开展如何优化调整区块注采压力系统,保持平衡开采,降低水、聚、三元相互干扰的研究尤为重要。本文以萨中开发区中区东部向东区过渡区的二类油层聚合物驱层位(SII10-PII7)和三元复合驱层位(SII1-SII15+16)为主要研究对象,利用相关地质建模软件建立储层精细三维地质构造模型、沉积相模型以及相控属性模型,储量拟合误差-0.253%。应用油藏数值模拟软件对研究区整体、典型井组及单井的产油量、含水率和压力进行一体化历史拟合,其中全区拟合误差小于3%,单井拟合误差均在±3%范围内,单井产油拟合符合率达到87.2%,拟合精度较高。同时应用数值模拟方法研究影响两驱地层压力分布因素,并根据正交设计结合压力干扰指标最终确定影响主控因素;在地层纵向和平面上研究不同时期水-聚、水-三元、聚-三元相互干扰压力变化特征,结果表明纵向和平面各时期层间压力分布不均,产生层间干扰,并且在过渡区的干扰最为严重,压力变化非常明显;针对地层压力分布不均,共提出注入井增注、生产井提液、封堵、压裂、补孔等5项调整措施,通过数值模拟方法对上述调整措施进行效果评价,针对生产井压力较低的区域,可以增加注入井液量;为获得最佳增油效果,在生产井最佳受效期采取提液措施;封堵主要针对水窜层位;当注入井压力较高,同时渗透率还较低的情况下可以采用压裂措施;生产井在某层位压力较高时,可以对该井在该层位进行补孔操作。通过本文研究,系统总结形成水、聚、三元同驱注采压力系统优化调整技术方法,并对其它同类油层开发区块的生产实践具有指导和借鉴意义,具备推广价值。
[Abstract]:In view of polymer flooding in Daqing Sazhong Oilfield, the scale of ASP flooding is expanding, and the phenomenon of water, aggregation and ternary interference is becoming more and more obvious. The variation of formation pressure caused by these three causes the uneven distribution of formation pressure. The problem of abnormal pressure zone is more and more prominent. It is very important to study how to optimize the pressure system of injection and production in blocks, to maintain balanced mining, to reduce water, aggregation and ternary interference. In this paper, the polymer flooding layer (SII10-PII7) and the ASP flooding layer (SII1-SII15 16) of the second class oil layers in the transition area from the east to the east in the middle and eastern part of the Sazhong Development Zone are taken as the main research objects. The fine 3D geological structure model, sedimentary facies model and facies control attribute model of reservoir are established by using relevant geological modeling software. The reserve fitting error is -0.2533. The oil production, water cut and pressure of the whole, typical well group and single well in the study area are fitted by using the reservoir numerical simulation software. The fitting error of the whole area is less than 3 and the fitting error of the single well is within 卤3%. The fitting coincidence rate of oil production in single well is 87.2, and the fitting accuracy is high. At the same time, numerical simulation method is used to study the factors affecting the pressure distribution of the two flooding formations, and the main control factors are finally determined according to the orthogonal design combined with the pressure disturbance index. The characteristics of water-accumulation, water-ternary and poly-ternary interferences in different periods are studied in vertical and plane strata. The results show that the pressure distribution between layers is uneven and interlayer interference occurs in different periods. And the interference is the most serious in the transition area, and the pressure change is very obvious. In view of the uneven distribution of formation pressure, five adjustment measures, such as increasing injection in injection wells, fluid extraction in production wells, plugging, fracturing and pore filling, are put forward. The effects of the above adjustment measures are evaluated by numerical simulation, and the low pressure areas of production wells are targeted at the areas where the pressure of production wells is low. The injection fluid can be increased; In order to obtain the best oil increasing effect, the liquid extraction measures should be taken in the optimum effective period of production wells, the plugging is mainly aimed at the water channeling horizon, the fracturing measures can be adopted when the injection well pressure is high and the permeability is low. When the pressure of production well is high, the hole filling operation can be carried out. Through the research in this paper, the paper systematically summarizes the technical methods of optimizing and adjusting the pressure system of formation of water, accumulation, three-element simultaneous flooding and production, and it is of guiding and referential significance to the production practice of other similar oil reservoir development blocks, and has the value of popularization.
【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】：TE357.4
，
本文编号：2384241
[Abstract]:In view of polymer flooding in Daqing Sazhong Oilfield, the scale of ASP flooding is expanding, and the phenomenon of water, aggregation and ternary interference is becoming more and more obvious. The variation of formation pressure caused by these three causes the uneven distribution of formation pressure. The problem of abnormal pressure zone is more and more prominent. It is very important to study how to optimize the pressure system of injection and production in blocks, to maintain balanced mining, to reduce water, aggregation and ternary interference. In this paper, the polymer flooding layer (SII10-PII7) and the ASP flooding layer (SII1-SII15 16) of the second class oil layers in the transition area from the east to the east in the middle and eastern part of the Sazhong Development Zone are taken as the main research objects. The fine 3D geological structure model, sedimentary facies model and facies control attribute model of reservoir are established by using relevant geological modeling software. The reserve fitting error is -0.2533. The oil production, water cut and pressure of the whole, typical well group and single well in the study area are fitted by using the reservoir numerical simulation software. The fitting error of the whole area is less than 3 and the fitting error of the single well is within 卤3%. The fitting coincidence rate of oil production in single well is 87.2, and the fitting accuracy is high. At the same time, numerical simulation method is used to study the factors affecting the pressure distribution of the two flooding formations, and the main control factors are finally determined according to the orthogonal design combined with the pressure disturbance index. The characteristics of water-accumulation, water-ternary and poly-ternary interferences in different periods are studied in vertical and plane strata. The results show that the pressure distribution between layers is uneven and interlayer interference occurs in different periods. And the interference is the most serious in the transition area, and the pressure change is very obvious. In view of the uneven distribution of formation pressure, five adjustment measures, such as increasing injection in injection wells, fluid extraction in production wells, plugging, fracturing and pore filling, are put forward. The effects of the above adjustment measures are evaluated by numerical simulation, and the low pressure areas of production wells are targeted at the areas where the pressure of production wells is low. The injection fluid can be increased; In order to obtain the best oil increasing effect, the liquid extraction measures should be taken in the optimum effective period of production wells, the plugging is mainly aimed at the water channeling horizon, the fracturing measures can be adopted when the injection well pressure is high and the permeability is low. When the pressure of production well is high, the hole filling operation can be carried out. Through the research in this paper, the paper systematically summarizes the technical methods of optimizing and adjusting the pressure system of formation of water, accumulation, three-element simultaneous flooding and production, and it is of guiding and referential significance to the production practice of other similar oil reservoir development blocks, and has the value of popularization.
【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】：TE357.4
，
本文编号：2384241
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