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鄂尔多斯盆地陇东地区长6X、长7Y储层纵向连续性差、横向上变化快,给水平井测井解释带来了一定难度。为了准确计算水平井储层参数,提高油层钻遇率,以研究区储层特征、测井资料为基础,围绕着水平井井眼轨迹与地层关系分析,给出了鄂尔多斯盆地致密油水平井储层划分建议,提出了储层各向异性分析步骤及计算方法,建立了水平井段分段分级评价方法,给出了水平井自然伽马、电阻率测井围岩校正方法,研究提高了水平井孔隙度、渗透率和含油饱和度等储层参数的计算精度,为水平井射孔段优化、提高水平井产能奠定了基础。
Longitudinal 6x and Long 7Y reservoirs in Longdong area of Ordos Basin are poor in longitudinal continuity and change rapidly in horizontal direction, which brings some difficulties in logging interpretation of horizontal wells. In order to accurately calculate the parameters of horizontal well reservoir and improve the drilling rate of the reservoir, based on the reservoir characteristics and well logging data of the study area, the relationship between well trajectory and formation of horizontal well is given, and the tight oil reservoir of Ordos Basin This paper presents the reservoir anisotropy analysis step and calculation method, sets up the method of subdivision and grading evaluation of horizontal well section, gives the correction method of horizontal well gamma ray and resistivity logging surrounding rock, and studies the improvement of horizontal well The calculation precision of reservoir parameters such as porosity, permeability and oil saturation has laid a foundation for perforation optimization of horizontal well and improvement of productivity of horizontal well.