我国部分油田已进入高含水开发后期甚至特高含水开发阶段，地下原油受注入水的 长期驱替，剩余油分布日趋零散，油水关系错综复杂，挖潜难度越来越大。在我国后备 资源不足的客观实际情况条件下，进一步做好老油田挖潜将是我国石油工业长期面临的 重要课题。 本文通过对国内外相关技术文献和研究成果的调研，针对大庆油田萨北开发区过渡 带地质储量大，预计水驱最终采收率低的实际情况，按照“改善过渡带开发效果，努力 增加油田可采储量”的整体要求，借鉴已成熟的水驱开发效果技术评价方法，开展过渡 带开发效果评价及三、四条带加密可行性研究。探索改善过渡带地区开发效果的新技术， 为增加开采储量，改善过渡带地区的开发效果，实现“百年油田”的宏伟目标奠定基础。 成果创新之处在于通过对过渡带特殊的油层条件和原油物性对过渡带分条带开发 效果进行评价，明确过渡带开发中存在的问题，提出一、二条带的调整对策，运用技术 经济方法给出三、四条带加密和五条带扩边的可行性分析，加密的初步布井方案。该成 果对改善过渡带地区的开发效果、挖掘剩余油潜力和萨北开发区的可持续发展具有重要 意义。同时，萨北开发区过渡带的油层条件、原油物性在大庆长垣具有较好的代表性。 因此，该研究成果可以在大庆油田推广应用，对改善大庆长垣过渡带地区开发效果具有 重要的指导意义，同时具有较大的社会效益。 关键词，大庆油田；过渡带；井网加密；剩余油分布；调整对策Feasible Study On Three And Four Itemized Belt Thickening In Sabei Development Area Intermediate Belt Abstract Some oil fields exploitation in China have entered the late stage of high water-cut or even the stage of ultra-high water-cut, because of the long-term displacing of underground water into the crude oil, and the remaining oil distribution become increasingly fragmented，the relationship between oil and water become more and more complex, resulting in increasing potentialities difficulties. So in the objective conditions of lacking reserve resources in China, do a better job in the old oilfield for furture exploitation will be an important issue which China's oil industry will face for a long time. In this paper, after investigation at both home and abroad related technical literature and Research results, in view of the actual situation that the large geologic reserve in the intermediate belt of Daqing Oilfield Sabei development area, and the actuarial situation that the expected ultimate recovery efficiency is low，aiming at fulfilling the overall requirements "improve development effectiveness of intermediate belt，make efforts to increase crude oil available reserve”, reference to the fully-fledged technical method in evaluaterating water driving effectiveness, carry out effectiveness evaluation of exploiting effect and propose feasibility studies on three and four strip thickening in intermediate belt. Looking for the new technologies which can improve the explore effect of regional development in the intermediate belt, that lay the foundation for realizing the grand goal of "oil for hundred years”, that exploiting new method which can increase the minable storability, improve the explore effect of regional development. The fruit’s Innovation is that through studying the special oil layer condition and the physical property in the intermediate belt, make development effect evaluation of itemized belt of intermediate belt and define the existing problem in intermediate Belt exploiting . propose the adjustment measures on one or two itemized belt, propose feasibility analysis on three and four itemized belt thickening and five Itemized belt extension, and propose the preliminary pattern of well. The result has great significance on improving the exploiting effectiveness in intermediate belt, discovering the potential capacity of remaining oil and the sustainable development of Sabei development area. At the same time, the oil layer condition and the physical property in Sabei development area show good representation in Daqing placanticline, therefore, theresearch results can be applied in the Daqing Oilfield, that has important guiding significance on improving exploiting effectiveness in Daqing placanticline intermediate belt,and at the same time has greater social benefits. Key words: Daqing Oilfield，Intermediate Belt，well pattern thickening，remaining oil distribution，adjustments目 录 摘要....................................................................................................................................... II ABSTRACT ............................................................................................................................. III 第一章 前 言..........................................................................................................................1 1.1 选题的目的和意义................................................................................................. 1 1.2 研究的主要内容..................................................................................................... 1 1.3 国内外发展现状..................................................................................................... 2 第二章 萨北开发区过渡带概况..............................................................................................4 2.1 地质概况................................................................................................................. 4 2.2 油层发育状况......................................................................................................... 5 2.3 油层沉积特征......................................................................................................... 8 2.3.1 泛滥—分流平原相带..................................................................................... 8 2.3.2 内前缘相沉积砂体......................................................................................... 8 2.3.3 外前缘相沉积砂体......................................................................................... 9 2.3 开发概况............................................................................................................... 10 第三章 过渡带分条带开发效果评价....................................................................................13 3.1 油田采收率和可采储量的确定........................................................................... 13 3.1.1 经验公式法................................................................................................... 13 3.1.2 水驱特征曲线法........................................................................................... 15 3.2 油田主要开发指标分析....................................................................................... 16 3.3 采出程度与综合含水关系评价........................................................................... 17 3.4 存水率与水驱指数评价....................................................................................... 18 3.5 注采系统效率评价............................................................................................... 22 3.6 油田开发经济界限分析....................................................................................... 24 3.7 过渡带开发中存在的主要问题........................................................................... 26 第四章 过渡带调整对策........................................................................................................28 4.1 过渡带一、二条带调整对策............................................................................... 28 4.1.1 调整措施由增油为主向控水和增油措施相结合转变............................... 28 4.1.2 调整方式由井网加密向井网综合利用方向转变....................................... 294.1.3 驱油方式由单一水驱向多元化驱替方式转变........................................... 29 4.2 过渡带三、四条带加密调整可行性分析........................................................... 29 4.2.1 水驱控制程度............................................................................................... 29 4.2.2 各类油层动用状况....................................................................................... 30 4.2.3 采油速度与采液、采油强度....................................................................... 30 4.2.4 过渡带地区套损状况分析........................................................................... 31 4.2.5 不同方法计算可采储量的对比分析........................................................... 32 第五章 过渡带三、四条带调整潜力与井网部署................................................................33 5.1 剩余油分布规律................................................................................................... 33 5.1.1 取芯井的水洗状况分析............................................................................... 33 5.1.2 更新、侧斜井的水淹资料分析................................................................... 33 5.1.3 剩余油剩余分布特征及成因类型............................................................... 34 5.2 可调厚度分析....................................................................................................... 35 5.2.1 调整对象的确定........................................................................................... 35 5.2.2 可调厚度的确定........................................................................................... 35 5.3 三、四条带加密井网部署................................................................................... 36 5.3.1 井网部署原则............................................................................................... 36 5.3.2 布井方式确定............................................................................................... 36 5.3.3 加密区域的划分和布井结果....................................................................... 37 5.3.4 采油井初期产能预测................................................................................... 38 5.3.5 经济效益评价............................................................................................... 38 结 论......................................................................................................................................39