【作者】 刘鸿博；

【导师】 周文；

【作者基本信息】 成都理工大学 ， 油气田开发工程， 2010， 博士

【摘要】 底水油藏是油田开发过程中难度较大的油藏类型之一。该类油藏同国内外的常规油藏相比,在地质、油藏工程和开采特征等方面存在显著差异。塔河1区三叠系下油组是典型的大底水小油顶的块状底水油藏,塔河1区三叠系下油组是长轴近SW-NE向的低幅背斜,沉积物源方向主要来自北东向,为一套辫状三角洲-滨浅湖沉积相。储层岩性为灰、灰白色粗、中、细粒长石岩屑砂岩、岩屑长石砂岩,局部含砾,储层非均质性强,渗透率变化大,分布有隔夹层,开发过程中水体活跃,生产见水快。本文从开发地质、储层地质模型、夹层的成因、类型、厚度和分布、断层的封堵性、油藏工程、目前开发方案的实施情况和治水措施等方面系统阐述了含夹层底水油藏的有效开发技术。在研究中,充分吸收前人的研究成果和认识,应用最小二乘支持向量机原理与方法,对塔河1区三叠系下油组油藏物性参数进行测井二次解释,得到与实际相吻合的孔隙度和渗透率。在此基础之上进行油藏地质建模,利用测井二次解释的物性参数以及隔夹层的展布,重点考虑底水对油藏的影响,建立起塔河1区三叠系下油组三维精细地质模型。通过对单井隔夹层的识别,结合该地区沉积相特征,对整个区块的隔夹层分布进行评价,建立水侵地质模型,进行单井水侵数值模拟,提出适合塔河1区三叠系下油组底水油藏的水侵模式。收集整理塔河1区三叠系下油组历年开发动态数据,从产量递减规律、储量动用程度、采收率及油田开发后期治水等多个方面进行研究评价。应用油藏数值模拟技术对下油组目前开发阶段和制度下的剩余油分布规律和治水控制因素进行预测。综合地质、开发的研究成果,针对塔河1区三叠系下油组目前存在的问题制定出综合治水方案。论文以塔河1区三叠系下油组底水油藏为研究对象,立足于下油组油藏隔夹层发育,底水发育的地质特征,以解决目前油田含水上升快等油田开发存在的问题,以计算机技术和建模、数模等软件为手段,综合地质、测井及生产动态等多方面资料,采用油藏评价一体化研究思路,动静结合,由定性到定量,形成了一套含夹层、大底水油藏的研究思路和技术方法,为同类油藏的勘探开发提供了探索性研究。更多还原

【Abstract】 Bottom water reservoir is the great difficulty reservoir in the process of oilfield development. This type reservoir has significant differences compared with home and abroad conventional reservoir in geological, engineering and recovery characteristics. Triassic lower oil formation of the 1st block of Tahe oilfield is the typical massive reservoir which has large bottom water but small oil top. Triassic lower oil formation of the 1st block of Tahe oilfield is a low amplitude anticline that its long axis is close to SW-NE trending. Sedimentary material source direction mainly comes from northeast direction. Sedimentary facies is braided delta-coastal shallow-lake facies. Reservoir lithology is grey, ironcored grey crude, medium, fine grained feldspathic lithic sandstone and debris-feldspar which partly contains conglomerate. Reservoir has strong heterogeneity and distributed barrier and interlayer. Permeability has large variation range. The water-body is active in the process of development. Water breakthrough speed is too fast. In this paper, we systematic exposite the effectively developed technology of the flaggy, interlayer and bottom water reservoir in development geology, reservoir geological model, the cause, type, thickness and distribution of interlayer, the sealing characteristics of faults, reservoir engineering, the present developed scheme and water control method.Useing the least squares support vector machine, the physical parameter of the reservoir is explained in the study. The porosity and permeability close to actual experiences is obtained. Using the physical parameter of well log interpretation and interlayer, we mainly consider the effect of bottom water. Based on above, we performed 3D fine geologic modeling. The interlayer of wells is identified. And the interlayer distribution combined with sedimentary facies features are evaluated. The water invasion models of triassic lower oil formation of the 1st block of Tahe oilfield are established though the geological model and numerical simulation of well. Collect and arrange the jahrlich development dynamical datas, we evaluate the reservoir from the production decline rule, reserves producing degree, recovery factor, water control of the late stage of development. Using numerical simulation of reservoir, we predict the residual oil distribution rule and water control factors in the present stage. The integrated water control method is established.The paper takes Triassic lower oil formation of the 1st block of Tahe oilfield as example,based on the geological characteristics of interlayer and bottom water development, to solve the present problem of water increased quickly, with computer technology, Petrel and Eclipse software, integrated geological, logging and reservoir engineering using reservoir evaluation integrated research ideas, combining static and dynamic, from qualitative to quantitative, formed a serious of research approach and technical methods of interlayer and large bottom water reservoir for the exploration and development of similar reservoir provides exploratory.更多还原