陇东致密区水平井井眼轨迹与地层关系

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。

Relationship Between Horizontal Well Trajectory and Formation Analysis in Longdong Tight Oil Area

Longitudinal continuity of Chang 6X, Chang 7Y reservoir is poor, and the lateral change quickly in Longdong area Erdos basin. Thus brings difficulties in horizontal well logging interpretation. In order to calculate the reservoir parameters of horizontal well accurately and improve the drilling rate of oil reservoir, the article based on reservoir characteristics, logging data in study area, the article analyzes relationship between horizontal well trajectory and formation. Suggestions for reservoir division of tight oil reservoir in Ordos Basin, Steps and calculation methods of reservoir anisotropy analysis, evaluation of reservoir in horizontal section, correction of natural gamma, resistivity logging for surrounded rock are presented in this paper. The study would improve calculation precision of reservoir porosity, permeability and saturation, optimize the zone of horizontal well perforating and improve production of horizontal well.