低渗透砂岩油藏产能影响因素及井网优化方法

发布时间：2018-01-01 18:18

本文关键词：低渗透砂岩油藏产能影响因素及井网优化方法　出处：《东北石油大学》2016年硕士论文　论文类型：学位论文

【摘要】：本文根据国内外技术现状及发展趋向,结合大庆外围朝阳沟油田等低渗透储层砂体变化大,孔隙不均匀、喉道细小、固液界面分子力和毛管力作用强烈的特点,应用恒速压汞及核磁共振原理确定了长垣待探明储量区低渗透储层可流动喉道半径下限及渗透率下限,深化了低渗透储层渗流规律认识,认为储层微观结构特征及非均质程度对储层流动能力影响很大。针对启动压力因素的问题分析了不同油田、特别是沉积特征差异较大的油田的启动压力梯度,结果表明尽管储层物性与启动压力梯度具有较好的相关性,但储层微观孔隙结构特征及可动流体百分数不受沉积特征差异影响。另外,本文还引入表达储层非均质特征的参数,完善了多元参数分类评价方法,克服了常规分类方法中采用渗透率分类中的矛盾和问题,并定量评价储层渗流能力。针对注水方式调整前水驱控制程度较低,渗流阻力较大,单井日产油较低,钻井、基建等投资大的特点,需要在从储层岩石的孔隙结构特征和渗流特点入手,通过室内渗流物理实验优化井网布署及合理进行注采系统调整、多次重复压裂等方面,由以前简单型的井网优化方法发展到以物质平衡原理、构模原理和极值原理为依据的多功能井网经济优化模型,研究出一套增效实用、合理提高采油速度及经济效益的综合技术,细致研究了影响低渗透油藏储层流动条件的因素,提出了大庆油田低渗透待探明储量区有效开发的动用条件及评价开发对策。应用以上技术,选取低渗透区块进行合理的经济评价方法研究,得到很好的经济效益,为日后大庆油田深入开发做好奠基。
[Abstract]:According to the domestic and foreign technology status and development trend, combined with the periphery of Daqing Chaoyanggou Oilfield low permeability reservoir sand body changes, the pore is not uniform, fine throat, the effects and characteristics of the solid-liquid interface molecular force and capillary force strong, the application of the constant pressure and magnetic resonance principle to determine the Changyuan to be proven reserves of low permeability zone the reservoir can flow throat radius and permeability lower limit, deepening the percolation law in low permeability reservoir, that the microstructure characteristics of reservoir and heterogeneity have great influence on the reservoir flow capacity. The starting pressure problems of different oil fields, especially the starting pressure gradient between the sedimentary characteristics of oilfield the results show that, although the reservoir with starting pressure gradient has good correlation, but the reservoir microscopic characteristics of pore structure and movable fluid percentage is not affected by the sedimentary characteristics of difference. In addition, This paper also introduced the parameters of reservoir heterogeneity expression, improve the classification and evaluation method of multiple parameters, to overcome the contradictions and problems in the classification of permeability using conventional classification method, and quantitative evaluation of reservoir for water. Adjust the water flooding control degree is low, the seepage resistance, oil production of single well is low, well drilling, infrastructure investment is big, need to start from the reservoir rock pore structure and seepage characteristics of seepage through indoor physical experiment optimization of well network deployment and reasonable injection production system adjustment, repeated fracturing, from development to the principle of material balance well before the simple type of network optimization method the modeling principle and the extremum principle, optimization model for the multi pattern economic basis, developed a set of practical efficiency, reasonable integrated technology to improve the oil recovery rate and economic benefit, detailed study. Factors affecting the low permeability reservoir flow conditions, the use of conditions and evaluation of development strategy of Daqing Oilfield low permeability to be effectively developed reserves area. Application of the above technology, selection of low permeability blocks of economic reasonable evaluation method, obtain good economic benefits, for the day after the Daqing oilfield, laying a foundation for further development.

【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE348

【相似文献】