QHD32-6油田北区剩余油分布及挖潜研究

发布时间：2018-08-08 10:48

【摘要】：剩余油分布研究是一项世界性难题,也是地质、地球物理和油藏工程等不同学科领域的前沿性课题。QHD32-6油田位于渤海中部海域,油田构造为大型披覆构造,储层为复杂河流相沉积,油藏埋深浅,油质稠。北区油藏受构造、断层、边(底)水和岩性综合控制,油水关系复杂,基本没有无水采油期。本文针对QHD32-6油田北区的开发特点,分析了目标区块的含水上升规律和产量递减规律等开发动态。运用油藏工程方法,从水驱采收率、水驱控制程度、存水率、水驱指数和体积波及系数等指标对研究区水驱开发效果进行了系统评价。数值模拟研究中,针对本区块油藏特点,运用Eclipse数值模拟软件建立了符合油藏实际的数值模拟模型。根据生产历史,对全区地质储量、产油量、产水量和含水率等各项开发指标进行了历史拟合,拟合程度基本符合技术要求。通过对各项开发指标的综合分析可知,QHD32-6油田北区剩余油主要分布在砂体边部、井间滞留区、井网不完善区、断层附近和构造高点等地区。最后,根据该区块剩余油分布特征,提出了合理的挖潜调整措施,并运用Eclipse软件模拟预测了一些调整方案,通过综合对比分析,优选出最佳调整方案。这为QHD32-6油田北区的高效开发以及在开发中后期如何提高最终采收率方面积累了宝贵的经验。
[Abstract]:The study of residual oil distribution is a worldwide problem, and it is also a leading subject in different disciplines such as geology, geophysics and reservoir engineering. The QHD 32-6 oil field is located in the middle of the Bohai Sea, and the oilfield structure is a large overburden structure. Reservoir is complicated fluvial facies deposit, reservoir buried shallow, oil thick. The reservoir in the north region is controlled by structure, fault, edge (bottom) water and lithology. The oil-water relationship is complex, and there is basically no water-free oil recovery period. In this paper, according to the development characteristics of North QHD32-6 oilfield, the water cut rising law and production decline law of target block are analyzed. By using reservoir engineering method, the water drive development effect in the study area is systematically evaluated from water drive recovery factor, water drive control degree, water storage rate, water drive index and volume sweep coefficient. In the research of numerical simulation, according to the characteristics of reservoir in this block, a numerical simulation model is established by using Eclipse software. According to the production history, the development indexes such as geological reserves, oil production, water production and water cut in the whole area are fitted in history, and the fitting degree is basically in line with the technical requirements. Based on the comprehensive analysis of various development indexes, it can be seen that the remaining oil in the northern part of QHD 32-6 oilfield is mainly distributed in the side of sand body, the interwell retention area, the imperfect well pattern area, the area near the fault and the high point of the structure, and so on. Finally, according to the distribution characteristics of remaining oil in the block, reasonable adjustment measures are put forward, and some adjustment schemes are simulated and forecasted by Eclipse software. Through comprehensive comparison and analysis, the best adjustment scheme is selected. This has accumulated valuable experience for the high efficiency development of North QHD32-6 oilfield and how to improve the final recovery in the middle and late stage of development.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE327

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