红山油田红003井区齐古组二段储层特征研究
Reservoir Characterization of the Second Section of Qigu Formation in Hong003 Well Area of Hongshan Oilfield

红山油田的红003井区坐落于准噶尔盆地的西北边缘。以往研究普遍将该区域侏罗系齐古组二段的油层有效下限电阻率定为25 Ω·m。然而，近期hD91445井在J₃q²层的473~480 m井段(电阻率20 Ω·m)进行的射孔及随后的注汽抽油试验产出了204吨原油，日产油率为1.4吨/日，油气比为0.28，这一结果突破了先前对油层有效性下限的理解，表明齐古组油层下限值得进一步研究。鉴于此，本研究旨在深入探讨齐古组二段的油层下限。通过综合钻井取心、测井、录井和分析化验资料，以及考量86口井在该层段的试油、试采和生产数据，本论文对齐古组二段的油层下限进行了重新界定。研究发现红003井区齐古组二段主要由细至中粒砂岩构成，储集空间以剩余粒间孔(55.5%)和原生粒间孔(42.5%)为主，辅以少量粒内溶孔(2%)。这一区域以29%的平均孔隙度和756.4 mD的平均渗透率表现出高孔隙度和高渗透率的优质储层条件。此外，通过本研究，油层的电阻率下限被修正为11.5 Ω·m，有效孔隙度下限调整为20.5%，含油饱和度下限调整为50%，这些关键参数的调整突破了原有的界定。基于这些新的认识，对该研究区地质储量的重新计算显示，相较于原储量报告，地质储量增加了67.6 × 10⁴吨。这一成果不仅为深化储层理解提供了新的视角，也为未来的储量资源勘探和开发提供了重要依据。
The Red 003 well area in the Hongshan Oilfield is located at the northwest edge of the Junggar Basin. Previous studies have generally set the effective lower reservoir resistivity limit of the second section of the Jurassic Qigu Formation in this area at 25 Ω·m. However, the recent perforation and subsequent steam injection and pumping test of the hD91445 well in the J₃q² layer in the 473~480 m section (resistivity 20 Ω·m) produced 204 tons of crude oil at a daily oil production rate of 1.4 tons per day, with an oil/gas ratio of 0.28, which breaks through the previous understanding of the lower limit of oil formation effectiveness, suggesting that it is worth further study. This result breaks through the previous understanding of the lower limit of oil formation effectiveness and suggests that the lower limit of oil formation in the Qigu Formation deserves further study. In view of this, this study aims to deeply explore the lower limit of oil formation in the second section of the Qigu Formation. By synthesizing the drilling core, logging, recording and analytical assay data, as well as considering the oil test, recovery test and production data of 86 wells in this section of the formation, this thesis redefines the lower limit of the oil formation in the second section of the Qigu Formation. It is found that the second section of the Qigu Formation in the Hong003 well area is mainly composed of fine- to medium-grained sandstones, and the reservoir space is dominated by remaining intergranular pores (55.5%) and primary intergranular pores (42.5%), supplemented by a small number of intragranular soluble pores (2%). This area exhibits high-quality reservoir conditions of high porosity and high permeability with an average porosity of 29% and an average permeability of 756.4 mD. In addition, through this study, the lower limit of resistivity of the reservoir was revised to 11.5 Ω·m, the lower limit of effective