【作者】 王雨；

【导师】 宋考平；

【作者基本信息】 大庆石油学院 ， 油气田开发工程， 2010， 硕士

【摘要】 目前,我国大庆油田对二、三类油层的开采越来越重视,因为这部分油层的剩余油较多,潜力较大。因此,加强各类油层的剩余油潜力、动用状况以及分布规律的研究,对老油田调整开发方案、制定增产措施具有重要的指导意义。纵观当前剩余油研究的相关学科前沿,以开发地质学和油藏工程学为指导,综合应用地质、地震、钻井、测井、取心、及开发动态等资料研究高含水期各类油层的剩余油潜力及动用状况将成为必然趋势。本文以大庆油田萨中开发区为例,首先考虑影响剩余油分布的因素,利用多级模糊综合评价原理,对典型区块进行剩余油潜力评价;然后分析各类油层的相对渗透率曲线特征、曲线形态的形成机理及特点,结合welge方程及乙型水驱规律曲线建立剩余油潜力评价模型,给出评价指标体系,并根据所建模型分析不同类型油层的动用状况及可动油潜力。最后,针对目前的开发现状,为了更好的对非主力油层进行剩余油挖潜,结合数值模拟手段,从理论上确定了现有井网二、三类油层的合理驱动压力梯度。通过论文研究,探索了一套以高含水期剩余油潜力评价为目标的开发地质、油藏工程综合评价方法,将定性的“地质静态”与定量的“开发动态”有机结合起来,为水驱砂岩油田高效开发及高含水期剩余油分布规律研究提供实践经验和理论依据。更多还原

【Abstract】 At present, Daqing oil field pays more and more attention to the recovery of second and third type reservoirs, because they have more remaining oil and greater potential. Therefore, the strengthening of study on remaining oil potential, producing condition and distribution of various reservoirs, has important significance for the old oil field to adjust the development plan and develop measures to increase production. Throughout the current science frontier related to the research of remaining oil, research of remaining oil potential and producing condition of various reservoirs in high water cut stage, guided by development geology and reservoir engineering and integrated application of geological, seismic, drilling, logging, coring and the development dynamics information, will become an inevitable trend.In this paper, take Sazhong development area of Daqing oilfield for example, consider the factors that affect the distribution of remaining oil first. Evaluate the remaining oil potential in the typical block by using multi-grade fuzzy comprehensive evaluation principle. And then analyze the relative permeability curves characters, the formation mechanisms and characteristics of the curve shape of various reservoirs. Establish the evaluation model of remaining oil potential combining with Welge equation and the law of water displacement curve B. Give the evaluation index system and analyze the producing condition and movable oil potential of various reservoirs according to the model established. Finally, in view of the current development status, in order to better tap the remaining oil in non major reservoirs, define reasonable driving pressure gradient of existing well pattern of the second and third type reservoirs combining with numerical simulation.Through the research in this paper, explore a set of comprehensive evaluation method with both development geology and reservoir engineering aimed at the evaluation of remaining oil potential in high water cut stage. Bond the qualitative "geological static" and quantitative "development dynamic" together to provide practical experience and theoretical basis for the effective water flooding development of sandstone oil field and the research of the distribution of remaining oil in high water cut stage.更多还原