辫状河厚砂体内部夹层的识别及分布特征
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摘要
通过野外露头浅砂质辫状河砂体研究,建立起辫状河砂体构型模式,将其内部夹层按成因分为心滩坝内落淤层、坝间夹层、道坝转换夹层和串沟4种类型。以大庆萨北开发区PI3沉积单元为研究对象,以丰富的岩心井资料为基础,建立了河道砂体内部薄夹层识别图版。借助序贯指示模拟及人机交互后处理方法,建立了研究区的三维储层构型模型,揭示了辫状河心滩坝内部夹层分布零散、连续性差的特性。辫状河中的水平夹层往往造成厚油层的分段水洗,有利于提高驱油效率,常在夹层的下部形成夹层遮挡型剩余油。研究成果为砂体再认识和剩余油挖潜奠定了基础。
By means of the researches on the sandbodies in the shallow sandy braided river of the field outcrops,the configuration modes of the sandbodies were established,according to the geneses of the internal interbeds,the following four types were classified:filled beds within the mid-channel bar,interbeds among the bars,inversed beds between the channels and bars and moreover the serial ditches.Taking Sedimentary Unit PI3 in Daqing Sabei Development Block as the study object,based on the rich core data,the identifying board chart of the internal thin interbeds of the river channel sandbodies was established.With the help of sequential indicating simulation and interactive postprocessing method,the model of 3D reservoir configurations for the study area was established,the characteristics of the scattered distribution and rather poorer connectivity were shown for the internal interbeds in the braided-river channel bars.Among these interbeds,the horizontal ones result in the sectioned water flushing for the thick oil layers,thus the oil displaced efficiency is enhanced,and furthermore the interbed-screened remained oil is often caused in the lower part of the interbeds.All the study achievements have laid a certain foundation for the reunderstanding of the sandbodies and potential tapping of the remained oil.
By means of the researches on the sandbodies in the shallow sandy braided river of the field outcrops,the configuration modes of the sandbodies were established,according to the geneses of the internal interbeds,the following four types were classified:filled beds within the mid-channel bar,interbeds among the bars,inversed beds between the channels and bars and moreover the serial ditches.Taking Sedimentary Unit PI3 in Daqing Sabei Development Block as the study object,based on the rich core data,the identifying board chart of the internal thin interbeds of the river channel sandbodies was established.With the help of sequential indicating simulation and interactive postprocessing method,the model of 3D reservoir configurations for the study area was established,the characteristics of the scattered distribution and rather poorer connectivity were shown for the internal interbeds in the braided-river channel bars.Among these interbeds,the horizontal ones result in the sectioned water flushing for the thick oil layers,thus the oil displaced efficiency is enhanced,and furthermore the interbed-screened remained oil is often caused in the lower part of the interbeds.All the study achievements have laid a certain foundation for the reunderstanding of the sandbodies and potential tapping of the remained oil.
引文
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[21]李志鹏,林承焰,彭学红,等.高浅南区明化镇组单砂体夹层对剩余油的控制作用[J].石油天然气学报(江汉石油学院学报),2011,33(9):23-27.
[22]强阵阵,刘雪玲,付春波,等.厚层砂体中夹层识别与对剩余油分布的影响[J].工业,2015,(5):168-169.
[2]吴胜和,岳大力,刘建民,等.地下古河道储层构型的层次建模研究[J].中国科学:D辑地球科学,2008,38(增刊):111-121.
[3]葛云龙,逯径铁,廖保方,等.辫状河相储集层地质模型:泛连通体[J].石油勘探与开发,1998,25(5):77-79.
[4]廖保方,张为民,李列,等.辫状河现代沉积研究与相模式:中国永定河剖析[J].沉积学报,1998,16(1):34-39.
[5]侯加根,刘钰铭,徐芳,等.黄骅坳陷孔店油田新近系馆陶组辫状河砂体构型及含油气性差异成因[J].岩相古地理,2008,10(5):459-464.
[6]冯冲,邹华耀,郭彤楼,等.川东北地区二叠系—三叠系礁滩相储层发育机理[J].特种油气藏,2015,22(6):1-4.
[7]孙靖,薛晶晶,贾开富,等.达巴松地区河道型储层砂体发育特征及预测[J].特种油气藏,2015,22(4):25-28.
[8]张昌民,尹太举,张尚锋,等.泥质隔层的层次分析:以双河油田为例[J].石油学报,2004,25(3):48-52.
[9]焦养泉,李桢.河道储层砂体中隔挡层的成因与分布规律[J].石油勘探与开发,1995,22(4):78-81.
[10]桑林翔,杨万立,杨浩哲,等.重18井区J3q3层夹层分布对SAGD开发效果的影响[J].特种油气藏,2015,22(3):81-84.
[11]张雨晴,王晖,范廷恩,等.海上S油田三角洲前缘河口坝砂体夹层识别与表征[J].石油地质与工程,2015,34(1):76-78.
[12]阎海龙,孙卫.水下分流河道砂体中夹层的识别及定量分析:以靖安油田盘古梁长6油层为例[J].西北大学学报(自然科学版),2006,36(1):133-136.
[13]全永旺.宝北区块辫状河道厚层砂体隔夹层特征研究[D].武汉:中国地质大学,2007.
[14]全永旺,姚光庆,董晓霞,等.焉耆盆地宝北区块厚层砂体夹层成因类型及结构模式[J].石油地质与工程,2007,21(2):9-12.
[15]刘铁岭.储层砂体夹层定量研究初探:以东庄油田为例[J].石油天然气学报,2012,34(5):49-53.
[16]王改云,杨少春,廖飞燕,等.辫状河储层中隔夹层的层次结构分析[J].天然气地球科学.2009,20(3):378-382.
[17]马世忠,吕桂友,闫百泉,等.河道单砂体建筑结构控三维非均质模式研究[J].地学前缘.2008,15(1):57-63.
[18]窦松江,季岭,王海波,等.王官屯油硼中生界厚油层内隔夹层研究[J].石油地质与工程,2008,22(1):48-51.
[19]于必河.碎屑岩系油气储层沉积学[M].北京:石油工业出版社,2008.
[20]亓校湘,马德勇,刘雷.等.河道砂体内部夹层特征研究[J].大庆石油地质与开发,2005,24(3):14-16.
[21]李志鹏,林承焰,彭学红,等.高浅南区明化镇组单砂体夹层对剩余油的控制作用[J].石油天然气学报(江汉石油学院学报),2011,33(9):23-27.
[22]强阵阵,刘雪玲,付春波,等.厚层砂体中夹层识别与对剩余油分布的影响[J].工业,2015,(5):168-169.