灰色关联法在欠平衡水平井地质导向钻进技术中的应用
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摘要
NF273-平253井是大庆油田第1口挖潜扶余油层储量的全过程欠平衡水平井,在钻进过程后期出现了岩屑返回失真甚至取不到样的情况,单纯依靠地质导向技术难以精确控制轨迹走向。针对该井地质导向施工难点,探讨了在录井岩屑部分失真的情况下运用灰色关联法识别岩性、同时利用钻进过程中综合钻时和气测等信息配合地质导向施工的方法。利用该方法有效提高了该井储层的穿透率,对同类施工具有一定的借鉴意义。
NF273-P253 well is the first horizontal well based on underbalanced drilling technology in Daqing Oilfield to tap the potential reserves of Fuyu reservoir.Late in the process of drilling cuttings returned to distortion or even failed to get,it's very difficult to control the trajectory to penetrate 100% sand only by geosteering technology.Based on the analysis of the difficulties in geosteering,the paper discusses how to identify the lithological by the grey Ccorrelative method when cutting sample is distorted,and the utilization of ROP and gas log information during drilling operation.By comprehensively using the above method,the percentage of sand penetration is increased efficiently in NF273-P253 well,also the methods will be helpful for the same type of operations.
NF273-P253 well is the first horizontal well based on underbalanced drilling technology in Daqing Oilfield to tap the potential reserves of Fuyu reservoir.Late in the process of drilling cuttings returned to distortion or even failed to get,it's very difficult to control the trajectory to penetrate 100% sand only by geosteering technology.Based on the analysis of the difficulties in geosteering,the paper discusses how to identify the lithological by the grey Ccorrelative method when cutting sample is distorted,and the utilization of ROP and gas log information during drilling operation.By comprehensively using the above method,the percentage of sand penetration is increased efficiently in NF273-P253 well,also the methods will be helpful for the same type of operations.
引文
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[2]王书礼,唐许平,李伯虎,等.低渗透油藏水平井开发设计研究[J].大庆石油地质与开发,2001,20(1):23-24.WANG Shuli,TANG Xuping,LI Bohu,et al.Study on the design of horizontal well development in low permeable res-ervoir[J].Petroleum Geology and Oilfield Development in Daqing,2001,20(1):23-24.
[3]姬生柱,毕雪松,娄志石,等.多学科方法在优化薄油层水平井地质设计及现场导向中的应用[J].大庆石油地质与开发,2005,24(4):64-66.JI Shengzhu,BI Xuesong,LOU Zhishi,et al.Application of multidisciplinary methods in optimization of geologic design for horizontal wells in thin oil layers and field geosteering[J].Petroleum Geology and Oilfield Development in Daqing,2005,24(4):64-66.
[4]姜岩,李纲,刘文岭,等.基于地震解释成果的地质建模技术及应用[J].大庆石油地质与开发,2004,23(5):115-117.JIANG Yan,LI Gang,LIU Wenling,et al.Geological mod-elling and application cases based on seismic interpretation achievement[J].Petroleum Geology and Oilfield Devel-opment in Daqing,2004,23(5):115-117.
[5]夏宏泉,陈平,石晓兵,等.基于随钻资料的地层岩性实时识别方法[J].石油学报,2004,25(2):51-54.XIA Hongquan,CHEN Ping,SHI Xiaobing,et al.Real-time recognizing method of lithology based on information while drilling[J].Acta Petrolei Sinica,2004,25(2):51-54.
[6]宋子齐,谢向阳,王浩,等.高凝油藏水淹层精细评价的分析处理方法[J].大庆石油地质与开发,2002,21(3):24-27.SONG Ziqi,XIE Xiangyang,WANG Hao,et al.Evaluation parameters and criterion for waterflooded formation logging of high-freezing reservoir[J].Petroleum Geology and Oil-field Development in Daqing,2002,21(3):24-27.
[7]胡克珍,吴菊仙,张超谟.灰色关联度在小层对比中的应用[J].江汉石油学院学报,1995,17(3):35-39.HU Kezhen,WU Juxian,ZHANG Chaomo.Application of grey correlation degree to sub-layer correlation[J].Jour-nal of Jianghan Petroleum Institute,1995,17(3):35-39.
[8]邵才瑞,李洪奇,张福明,等.人机联作智能地层对比技术[J].测井技术,1998,22(6):439-441.SHAO Cairui,LI Hongqi,ZHANG Fuming,et al.The inter-active technology of artificial intelligence for well log corre-lation[J].Well Logging Technology,1998,22(6):439-441.
[9]王香文,杜明亮,于文芹,等.灰色关联法在地层对比中的应用及其改进[J].测井技术,2006,30(2):126-128.WANG Xiangwen,DU Mingliang,YU Wenqin,et al.Appli-cation of grey correlation method for stratigraphic correla-tion and its improvements[J].Well Logging Technology,2006,30(2):126-128.
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