底水稠油油藏蒸汽驱室内模拟实验研究-油气田开发工程专业论文.docxVIP

II II III III 中文摘要 论文题目：底水稠油油藏蒸汽驱室内模拟实验研究 专 业：油气田开发工程 硕 士 生：（签名） 指导教师：（签名） 摘 要 南堡 35-2 油田是位于渤海中部具有代表性的底水稠油油藏，具有原油粘度大、储 层渗透率高、非均质严重等特点，同时油藏中的底水锥进使生产井快速水淹也严重制约 了油田的有效开发。因此，本文主要通过室内实验来研究南堡 35-2 油田注蒸汽开采技 术的机理，包括一维填砂模型和平板物理模型的热水驱和蒸汽驱实验研究该油田稠油油 水相渗规律以及不同井型和开发方式的驱替特征，同时分析了底水油藏底水锥进机理， 进而利用三维油藏物理模型模拟南堡 35-2 底水稠油油藏对底水锥进主控因素展开了实 验研究。研究表明： 1．稠油油水相对渗透率差异很大，水相相对渗透率末端点值通常都很小；温度升 高，相渗曲线右移，油水两相区域扩大，水相相对渗透率右端点值增加，等渗点含水饱 和度右移，表明，升温改变储层岩石表面性质，使向水湿方向转化束缚水饱和度增大。 2．蒸汽驱相比较于热水驱，温度相对较高，蒸汽流动性更好，对油层的加热效果 也更明显，热前缘波及体积更大，从而使最终的采收率也比热水驱的大。 3．水平井生产时，增大了井筒与油藏的接触面积，使油藏压力梯度减小，直井生 产时的泄压点变成水平井生产时的泄压线，增大了泄压面积，抑制驱替流体突进，同时 也增大了热流体在油藏中的波及体积，提高原油采收率。 4．优化选择水平井水平段长度以及避射高度可以有效的抑制底水锥进，针对底水 稠油油藏，可以采用水平井与注蒸汽复合采油技术开发。 关键词：稠油 相对渗透率 底水 蒸汽驱 油藏物理模拟 英文摘要 英文摘要 Subject ：The Laboratory Experiments Research on Bottom-water Heavy Oil Reservoir with Steam Flooding Speciality：Oil Gas Exploration Engineering Name ： (signature) Instructor：(signature ) ABSTRACT The Nanpu 35-2 oil field that is located in the central of Bohai Sea is a representative bottom water heavy oil reservoir. Its oil viscosity and reservoir permeability are very high and the heterogeneity is also serious. And the production well are waterflooding owing to the bottom water coning, which has seriously hampered the effective development of the oilfield. Therefore, the thesis study the mechanism of steam injection for the Nanpu 35-2 oilfield which is mainly through lab experiments, including the hot water and steam flooding of one-dimensional sand packed model experiments research the heavy oil-water filtration law and displacement characteristic under different producing well-type and development mode, and also analyzed the mechanism of the bottom water reservoir bottom water coning, and then the Nanpu 35-2 bottom water heavy oil reservoir is simulated by the physical model of the three-dimensional reservoir, the main controlling factors of bottom water coning has been studied. The results show that: The differences between the heavy oil-water r