环江地区长7致密砂岩油藏测井解释方法研究

发布时间：2018-10-09 14:24

【摘要】：环江地区位于鄂尔多斯盆地西部,是环江油田的主力开发区域。近年来随着油田产能建设任务的加大和油田开发力度的增加,环江地区延长组长7储层不断钻遇出油井点,显示出良好的滚动开发潜力。基于此开展对环江地区长7致密砂岩油藏测井解释研究,为下一步的勘探及开发建产工作打好坚实的基础。本文以鄂尔多斯盆地环江地区延长组长7致密砂岩储层为研究对象,利用录井资料、岩心分析资料、测井资料,结合长7储层沉积背景和地层特征,分析研究长7致密砂岩储层的物性、非均质性等储层特征及其影响因素,通过“四性关系”研究,建立测井参数解释模型,并对储层进行测井次解释和致密油层判识。具体取得以下认识:(1)环江地区延长组长7储层主要发育三角洲前缘沉积相和深湖-半深湖沉积相,储层粒度较细,以细砂岩、粉砂岩为主。孔隙度、渗透率低,储层物性差,常规测井精度和分辨力低,有效储层识别难。(2)通过“四性关系”研究,确定油水层测井响应特征,精确建立泥质含量、孔隙度、渗透率、饱和度解释模型,应用经验统计法、产能分析法、孔饱关系法、最小流动孔喉半径法,综合分析确定储层物性下限:孔隙度为6.0%,渗透率为0.03x10、^^。(3)根据长7致密油藏地层特征、成藏模式和试油资料,应用储层参数界限值法确定致密油层电性标准,结合曲线形态特征法、TPI指数法、视电阻增大率法、微差分析法等多种定量和定性致密油层判识技术,综合分析对比,以提高解释符合率,并通过试油结果进行验证,取得较好的实际应用效果。
[Abstract]:Huanjiang area, located in the west of Ordos Basin, is the main development area of Huanjiang Oilfield. In recent years, with the increase of productivity construction task and the increase of oilfield development, Yanchang No. 7 reservoir in Huanjiang area has been drilling and meeting oil well point, which shows good rolling development potential. Based on this, the logging interpretation of Chang 7 tight sandstone reservoir in Huanjiang area is carried out, which lays a solid foundation for the next exploration and development. This paper takes Yanchang 7 tight sandstone reservoir in Huanjiang area, Ordos Basin as the research object, using logging data, core analysis data and logging data, combined with the sedimentary background and stratigraphic characteristics of Chang 7 reservoir. The physical properties, heterogeneity and influencing factors of Chang 7 tight sandstone reservoir are analyzed and studied. Through the study of "four properties", a logging parameter interpretation model is established, and logging times interpretation and tight reservoir identification are carried out. The main results are as follows: (1) the reservoir of Yanchang Group 7 in Huanjiang area mainly developed delta front sedimentary facies and deep lacustry-semi-deep lake sedimentary facies with fine grain size mainly composed of fine sandstone and siltstone. Porosity, low permeability, poor physical properties of reservoir, low precision and resolution of conventional logging, difficult to identify effective reservoir. (2) through the study of "four-property relationship", the response characteristics of logging are determined, and the shale content, porosity and permeability are accurately established. The saturation interpretation model, the empirical statistics method, productivity analysis method, pore saturation relation method, minimum flow pore throat radius method, are used to determine the lower limit of reservoir physical properties: porosity is 6.0, permeability is 0.03x10, (3) according to the formation characteristics of Chang7 tight reservoir, The reservoir forming model and oil testing data are used to determine the electric property standard of dense reservoir by using the method of reservoir parameter limit value, combined with curve shape characteristic method, TPI index method, apparent resistance increase rate method, differential analysis method, and so on. Comprehensive analysis and contrast to improve the interpretation coincidence rate, and through the test results to verify, and obtain a better practical application effect.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P631.81

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