基于模糊综合评判的油井酸化选井方法
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摘要
目前油井酸化是P油田的主要增产措施,受平台流程及钻完井作业影响等因素限制,每年可实施油井酸化的井次有限。为了提高酸化增油量,需要进行酸化井优选。运用模糊综合评判的方法进行本次研究,首先对已实施油井的酸化效果进行评价和相关性分析,确定影响酸化效果的主因为充填系数最小值、非主力连通层地层系数占比、垂向压力分布标准差等;分析酸化效果,确定单因素评判集,求得隶属度矩阵;利用层次分析法比较各因素,求得权重向量;由隶属度矩阵和权重向量可求出综合评判结果,从而建立了酸化优选方法。2017年优选酸化井实施19井次,平均年单井增油0.5×104 m3。该法为P油田酸化选井提供了理论依据,为相似油田油井酸化及其他措施选井提供了有益的借鉴。
Producer acidization is main treatment for Bohai P oilfield.The acidization time is limited by platform process and drilling jobs.To enlarge acidization incremental oil,it is necessary to conduct producer acidization candidate screen research using fuzzy evaluation theory.By evaluating the acidization results and conducting correlation analysis,the main influence factors were found,which include KHfactor of thin and no support layer,the minimum value of proppant pack factor,the standard deviation of vertical pressure distribution etc.By analyzing results of acidization,the comment set were determined,which can calculate each influence factor's membership matrix.The weight vector was calculated using root method based on judgment matrix from hierarchic analysis process.The evaluation results was calculated by weight vector and membership matrix.The development experience reveals that screening producer to stimulate using this method can greatly enhance oil rate.19 acidization jobs have been done with 0.5×104 m3 oil incremental per each well.The findings of this study give theoretical and technical support for screening producer acidization in P oilfield and similar reservoirs.
Producer acidization is main treatment for Bohai P oilfield.The acidization time is limited by platform process and drilling jobs.To enlarge acidization incremental oil,it is necessary to conduct producer acidization candidate screen research using fuzzy evaluation theory.By evaluating the acidization results and conducting correlation analysis,the main influence factors were found,which include KHfactor of thin and no support layer,the minimum value of proppant pack factor,the standard deviation of vertical pressure distribution etc.By analyzing results of acidization,the comment set were determined,which can calculate each influence factor's membership matrix.The weight vector was calculated using root method based on judgment matrix from hierarchic analysis process.The evaluation results was calculated by weight vector and membership matrix.The development experience reveals that screening producer to stimulate using this method can greatly enhance oil rate.19 acidization jobs have been done with 0.5×104 m3 oil incremental per each well.The findings of this study give theoretical and technical support for screening producer acidization in P oilfield and similar reservoirs.
引文
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[13]金和生.用层次分析法探讨科研成果的综合评价[J].系统工程理论与实践,1985,5(1):33-38.
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[15]耿彤,王凤清,文自力,等.用模糊层次分析法进行水平井增产潜力综合评价[J].石油钻采工艺,2012,34(S0):44-47.
[16]张吉军.模糊层次分析法[J].模糊系统与数学,2000(2):80-88.
[17]李永,胡向红,乔箭.改进的模糊层次分析法[J].西北大学学报(自然科学版),2005,35(1):11-12.
[18]兰继斌,徐扬,霍良案.模糊层次分析法权重研究[J].系统工程理论与实践,2006,26(9):107-112.
[19]梁艳梅,翟宏琛,常胜江,等.基于最大隶属度原则的彩色图像分割方法[J].物理学报,2003,52(11):2655-2658.
[2]张明,刘光泽,程飞,等.SZ36-1油田稠油储层解堵酸化技术研究[J].非常规油气,2017,4(2):85-90.
[3]DONG C,ZHU D,HILL A D..Modeling of the acidizing process in naturally fractured carbonates[J].SPE 81816,2002.
[4]赵增迎,杨贤友,周福建,等.转向酸化技术现状与发展趋势[J].大庆石油地质与开发,2006,25(2):68-71.
[5]孙鹏.酸化工艺在X油区的研究与应用[D].大庆:东北石油大学,2013,5-7.
[6]吴建发,郭建春,赵金洲.压裂酸化选井模糊综合评判方法[J].石油钻采工艺,2004,26(2):54-56.
[7]肖淳芳.模糊数学在石油工业中的应用[M].北京:石油工业出版社,1993:7-12.
[8]唐海,黄炳光,李道轩,等.模糊综合评判法确定油藏水驱开发潜力[J].石油勘探与开发,2002,29(2):97-99.
[9]何增军,宋成立,鲁宁,等.模糊综合评判快速识别低效无效循环井层:以扶余油田西10-2区块为例[J].非常规油气,2016,3(1):41-46.
[10]何春雄,龙卫江,朱锋峰.概率率与数理统计[M].北京:高等教育出版社,2012:25-30.
[11]王广运,黄兴艳,付志国.大庆喇萨杏油田萨零组油层模糊综合评判[J].大庆石油地质与开发,2003,22(5):22-25.
[12]刘星.朝阳沟油田压裂井层优选及产能预测方法研究[D].大庆:东北石油大学,2013:24-27.
[13]金和生.用层次分析法探讨科研成果的综合评价[J].系统工程理论与实践,1985,5(1):33-38.
[14]孙福街,程林松,李秀生.层次分析法在油田开发综合评价与方案优选中的应用探讨[J].中国海上油气(地质),2002,16(5):328-343.
[15]耿彤,王凤清,文自力,等.用模糊层次分析法进行水平井增产潜力综合评价[J].石油钻采工艺,2012,34(S0):44-47.
[16]张吉军.模糊层次分析法[J].模糊系统与数学,2000(2):80-88.
[17]李永,胡向红,乔箭.改进的模糊层次分析法[J].西北大学学报(自然科学版),2005,35(1):11-12.
[18]兰继斌,徐扬,霍良案.模糊层次分析法权重研究[J].系统工程理论与实践,2006,26(9):107-112.
[19]梁艳梅,翟宏琛,常胜江,等.基于最大隶属度原则的彩色图像分割方法[J].物理学报,2003,52(11):2655-2658.