【作者】 杨鹏；

【导师】 闫长辉；

【作者基本信息】 成都理工大学 ， 油气田开发地质， 2011， 硕士

【摘要】 本文对大牛地气田沉积亚相类型、储层岩石学特征、物性特征、孔隙结构特征和储层非均质特征进行综合评价。结合气田开发地质特征对气藏能量、流体性质、温度压力系统、气藏类型和合采工艺技术的实施情况分析。经分析发现,由于气藏压力系统、储层物性和产能差异,多层合采中可能出现的层间干扰,使得合采井产能受抑制且最终采收率降低。为了保证气田高效开发并兼顾气藏最终采收率,本次研究综合考虑气藏物理模型、流体、压力和温度以及开采速度等因素,设计了能真实反映气藏实际的长岩心油层物理实验装置。根据本区主要产层沉积微相、岩性、孔隙度和渗透率等差异,选择并组合真实的钻井取心进行试验。使用数据挖掘手段中的神经网络数学模型对物理模拟实验结果进行分析并预测。从实验用岩心的岩性、物性和电性等方面评价不同地质特征的产层、不同时机合采接替对气藏采收率的影响。为现场生产寻找不同地质特征产层合采接替的合理时机提供参考。通过分析发现,当以合采接替开发致密低压气藏时,应尽量兼顾单井采收率,以获得较高的气藏开发水平。在避免层间干扰的前提下,应尽量在不同产层压力接近时尽早进行合采接替开发。大牛地气田主要开发的上古生界六套产层的最高与最低气藏压力仅相差3.67MPa,这一特征为早期多层合采接替创造了物质基础。更多还原

【Abstract】 Thesis is assessed based on the types of sub-facies, reservoir petrologic characteristics, physical characterization, pore structural features and reservoir heterogeneity characteristics in Daniudi gas field. This paper have analyzed the energy of gas pools, fluid properties, T P system, gas pool type and process engineering of commingling production in combination with development geologic feature in gas field. The essay concludes that commingling production probable made interlayer interference because the pressure system, reservoir petrophysical and productivity difference. Those reasons made the commingled producing well of productivity inhibition and reduced formation final recovery. In order to ensure high-efficiency development gas fields and pay attention to recovery efficiency, and many factors that physical model of gas reservoir, fluid, pressure, temperature and rate of production are considered in this research. We design combined core experimental facility of petrophysics and it can reflect fact of gas reservoirs. According to the microfacies, lithology, porosity and permeability of principal producing formation in researched area, combined cores are selected and assembled for experiments. Neural network mathematics model applied for analysis results and prediction of the physical simulation experiments. The effects of recovery gas reservoirs are evaluated by different geologic feature of productions and the different time of commingling production. It can provide reference for time of commingling production in different geologic feature of productions. When commingling production develop these low pressure and tight gas reservoirs, through the above analysis, we need pay attention to recovery efficiency of single-well, for higher levels of gas reservoirs development are obtained. Under avoid interlayer interference conditions, when the pressures of different productions are equation, commingling production need carry out as early as possible. Maximum pressure difference in different productions is 3.67MPa in upper Paleozoic of Daniudi gas field. It has built solid material foundation which is early stage commingling production.更多还原