利用单渗砂层优势微相带概念精细评价有利沉积微相及其剩余油分布——以温西三块储层、水淹层评价为例
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摘要
针对温西三块三间房组辫状河三角洲前缘储集砂体受河道水流和湖浪双重作用,在注水开发中砂体结构、赋存状态及剩余油分布复杂的特点,提出利用单渗砂层优势微相带概念精细评价有利沉积微相及其剩余油分布的方法。该研究利用在砂层沉积时间跨度内,垂向叠置演化的各单渗砂层的能量厚度,确认出辫状河三角洲前缘各种不同类型主体和非主体储集砂体微相带的发育及演化特征,不但克服了薄差砂层叠加厚度识别主体储集砂体河道、河口坝微相带的失误,而且在垂向上有效地评价出了与主体微相叠置演化的河道边远梢席状砂、远砂微相砂体。该文利用单渗砂层优势微相带概念,通过目的层段单渗砂层能量厚度及其岩性、物性和自然电位减小系数、自然伽马减小系数、声波时差、密度、中子孔隙度、深侧向、深感应电阻率建立精细评价有利沉积微相的单渗砂层能量厚度标准,准确提取单渗砂层优势微相带的沉积能量及其测井参数信息,有效地展示出目的层段单渗砂层能量厚度垂向演化的水下分流河道、河口坝、席状砂、远砂微相平面展布规模和范围,并列举出注水开发中主体微相河道正向叠置韵律层中的层间差异层和非主体微相席状砂层受河道高渗层间干扰造成的剩余油分布层段,为准确预测和筛选不同类型已动用油层及未动用(或基本未动用)油层剩余油分布提供了可靠的地质依据。
In view of the dual function of river water and lake wave at Wen Xisan Block,San Fangjian formation braided river delta front reservoir sand,and the characteristics of sand structure,occurrence condition and complex remaining oil distribution in the waterflood development,the paper puts forward using the concept of single permeability sand layer favorable microfacies belt to refinedly evaluate favorable sedimentary microfacies and remaining oil distribution. The single permeability sand layer energy thickness is used,which vertical superimposed evolution in the sedimentary period of sand layer,to confirm favorable microfacies belt development,scale and distribution range of braided river delta front underwater distributary channel,mouth bar,sheet sands,and far sand. This not only effectively overcomes the mistakes made in similar causes poor thin sand layer or sand mud interbed sand layer accumulative thickness identification and body skeleton channel sand body,river mouth bar microfacies belt partition,but also avoids losing remote sheet sand,distal sand microfacies sandbodies which vertical superimposed evolution with the main microfacies. Thus,in this paper,favorable single permeability sand microfacies belt concept is taken,through the single permeability sand layer thickness,self-potential decrease coefficient,natural gamma ray decrease coefficient,acoustic interval,density,neutron porosity,deep lateral,deep induction resistivity and lithology,porosity,permeability of objective strata,to set single permeability sand layer energy thickness refined evaluation standard of favorable sedimentary microfacies,accurately extracting single permeability sand favorable sedimentary microfacies belt sedimentary energy and logging parameter information,effectively showing the plane distribution scale and scope of single permeability sand layer energy thickness vertical evolution underwater distributary channel,mouth bar,sheet sand,distal sand microfacies at the objective strata,and citing that in the waterflood development the strata remaining oil distributed is caused by differential layers in main microfacies river channel positive superimposed rhythmite and non-subject microfacies sheet sand layer disturbed by river channel high permeability layer. Those made a reliable geological basis to accurately predict and filtrate remaining oil distribution in different types of used and unused( or basically unused) reservoirs.
In view of the dual function of river water and lake wave at Wen Xisan Block,San Fangjian formation braided river delta front reservoir sand,and the characteristics of sand structure,occurrence condition and complex remaining oil distribution in the waterflood development,the paper puts forward using the concept of single permeability sand layer favorable microfacies belt to refinedly evaluate favorable sedimentary microfacies and remaining oil distribution. The single permeability sand layer energy thickness is used,which vertical superimposed evolution in the sedimentary period of sand layer,to confirm favorable microfacies belt development,scale and distribution range of braided river delta front underwater distributary channel,mouth bar,sheet sands,and far sand. This not only effectively overcomes the mistakes made in similar causes poor thin sand layer or sand mud interbed sand layer accumulative thickness identification and body skeleton channel sand body,river mouth bar microfacies belt partition,but also avoids losing remote sheet sand,distal sand microfacies sandbodies which vertical superimposed evolution with the main microfacies. Thus,in this paper,favorable single permeability sand microfacies belt concept is taken,through the single permeability sand layer thickness,self-potential decrease coefficient,natural gamma ray decrease coefficient,acoustic interval,density,neutron porosity,deep lateral,deep induction resistivity and lithology,porosity,permeability of objective strata,to set single permeability sand layer energy thickness refined evaluation standard of favorable sedimentary microfacies,accurately extracting single permeability sand favorable sedimentary microfacies belt sedimentary energy and logging parameter information,effectively showing the plane distribution scale and scope of single permeability sand layer energy thickness vertical evolution underwater distributary channel,mouth bar,sheet sand,distal sand microfacies at the objective strata,and citing that in the waterflood development the strata remaining oil distributed is caused by differential layers in main microfacies river channel positive superimposed rhythmite and non-subject microfacies sheet sand layer disturbed by river channel high permeability layer. Those made a reliable geological basis to accurately predict and filtrate remaining oil distribution in different types of used and unused( or basically unused) reservoirs.
引文
[1]宋子齐,王桂成,赵宏宇,等.利用单渗砂层能量厚度研究有利沉积微相及其含油有利区的方法[J].沉积学报,2008,26(3):452-458.
[2]李顺明,宋新民,刘日强,等.温米退积型与进积型浅水辫状河三角洲沉积模式[J].吉林大学学报(自然科学版),2011,41(3):665-672.
[3]宋子齐,程国建,王静,等.特低渗透油层有效厚度确定方法研究[J].石油学报,2006,27(6):103-106.
[4]宋子齐.灰色理论油气储层评价[M].北京:石油出版社,1995:110-140.
[5]周丽清,吴胜和,熊琦华,等.吐哈盆地WM油田辫状河三角洲前缘砂体分析[J].沉积学报,2000,18(2):248-252.
[6]李菊花,李相方,高文军,等.吐哈油田中高含水期油藏剩余油分布研究[J].天然气地球科学,2005,16(3):378-381.
[7]宋子齐,赵磊,王瑞飞,等.利用常规测井方法识别划分水淹层[J].西安石油学院学报,2003,18(6):50-53.
[8]张昌民,张尚锋,李少华,等.中国河流沉积学研究20年[J].沉积学报,2004,22(2):183-188.
[9]宋子齐,白振强,陈荣环,等.陕北斜坡东部低渗透储集层有利沉积微相带[J].新疆石油地质,2004,25(6):588-591.
[10]刘林玉,王震亮,张龙.鄂尔多斯盆地镇北地区长3砂岩的成岩作用及其对储层影响[J].沉积学报,2006,24(5):690-697.
[11]宋子齐,程国建,杨立雷,等.利用测井资料精细评价特低渗透储层的方法[J].石油实验地质,2006,28(6):595-599.
[12]高兴军,宋子齐,程仲平,等.影响砂岩油藏水驱开发效果的综合评价方法[J].石油勘探与开发,2003,30(2):67-71.
[13]宋子齐,王瑞飞,孙颖,等.基于成岩储集相定量分类模式确定特低渗透相对优质储层[J].沉积学报,2010,29(1):77-84.
[14]王新民,郭彦如,付金华,等.鄂尔多斯盆地延长组长8段相对高孔渗砂岩储集层的控制因素分析[J].沉积学报,2006,24(4):549-554.
[15]宋子齐,杨立雷,程英,等.非均质砾岩储层综合评价方法[J].石油实验地质,2007,29(4):415-419.
[16]李凤杰,王多云,张庆龙,等.鄂尔多斯盆地陇东地区延长组沉积相特征与层序地层分析[J].沉积学报,2006,24(4):549-554.
[17]宋子齐,杨金林,潘玲黎,等.利用粒度分析资料研究砾岩储层有利沉积相带[J].油气地质与采收率,2005,12(6):16-18.
[2]李顺明,宋新民,刘日强,等.温米退积型与进积型浅水辫状河三角洲沉积模式[J].吉林大学学报(自然科学版),2011,41(3):665-672.
[3]宋子齐,程国建,王静,等.特低渗透油层有效厚度确定方法研究[J].石油学报,2006,27(6):103-106.
[4]宋子齐.灰色理论油气储层评价[M].北京:石油出版社,1995:110-140.
[5]周丽清,吴胜和,熊琦华,等.吐哈盆地WM油田辫状河三角洲前缘砂体分析[J].沉积学报,2000,18(2):248-252.
[6]李菊花,李相方,高文军,等.吐哈油田中高含水期油藏剩余油分布研究[J].天然气地球科学,2005,16(3):378-381.
[7]宋子齐,赵磊,王瑞飞,等.利用常规测井方法识别划分水淹层[J].西安石油学院学报,2003,18(6):50-53.
[8]张昌民,张尚锋,李少华,等.中国河流沉积学研究20年[J].沉积学报,2004,22(2):183-188.
[9]宋子齐,白振强,陈荣环,等.陕北斜坡东部低渗透储集层有利沉积微相带[J].新疆石油地质,2004,25(6):588-591.
[10]刘林玉,王震亮,张龙.鄂尔多斯盆地镇北地区长3砂岩的成岩作用及其对储层影响[J].沉积学报,2006,24(5):690-697.
[11]宋子齐,程国建,杨立雷,等.利用测井资料精细评价特低渗透储层的方法[J].石油实验地质,2006,28(6):595-599.
[12]高兴军,宋子齐,程仲平,等.影响砂岩油藏水驱开发效果的综合评价方法[J].石油勘探与开发,2003,30(2):67-71.
[13]宋子齐,王瑞飞,孙颖,等.基于成岩储集相定量分类模式确定特低渗透相对优质储层[J].沉积学报,2010,29(1):77-84.
[14]王新民,郭彦如,付金华,等.鄂尔多斯盆地延长组长8段相对高孔渗砂岩储集层的控制因素分析[J].沉积学报,2006,24(4):549-554.
[15]宋子齐,杨立雷,程英,等.非均质砾岩储层综合评价方法[J].石油实验地质,2007,29(4):415-419.
[16]李凤杰,王多云,张庆龙,等.鄂尔多斯盆地陇东地区延长组沉积相特征与层序地层分析[J].沉积学报,2006,24(4):549-554.
[17]宋子齐,杨金林,潘玲黎,等.利用粒度分析资料研究砾岩储层有利沉积相带[J].油气地质与采收率,2005,12(6):16-18.
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