鄂尔多斯盆地盐池地区长4+5油藏主控因素及成藏模式
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摘要
鄂尔多斯盆地盐池地区长4+5油藏具有良好的开发潜力,但同时也存在着地质条件和成藏机理复杂等问题,因此需要对其油藏主控因素和成藏模式展开研究。针对这些问题,从烃源岩、输导体系、沉积储层特征和构造特征等地质因素入手,最终确定了研究区长4+5油藏的主控因素:长7地层广泛发育的烃源岩为长4+5油藏提供了重要的物质基础,其分布的范围和厚度控制了长4+5油藏整体的分布范围;长4+5和长6地层发育的高倾角、近东西向的裂缝和连通性良好的砂体构成的输导体系,在空间上的分布位置影响了长4+5油藏的分布位置;经过沉积和储层成岩作用改造的优质储层"甜点"有利于长4+5油藏富集。在主控因素的研究基础上,盐池地区长4+5油藏的成藏模式可总结为:长7烃源岩为长4+5油藏提供了物质基础,油气通过输导体系进入长4+5地层的砂体后,靠近输导体系的储层有利于优先聚集油气,并最终在长4+5储层"甜点"处富集。
The Chang4+5 oil reservoirs in the Yanchi area of the Ordos Basin has good development potential,but there are issues such as complicated geological conditions and hydrocarbon accumulation mechanism at the same time.Therefore,it is necessary to study the main controlling factors and hydrocarbon accumulation patterns of them.In view of these issues,the main controlling factors of the Chang4+5 oil reservoirs in the study area were finally determined according to source rocks,transportation system,sedimentary reservoir characteristics and structural characteristics and other geological factors.The source rocks developed well in Chang7 formation provide an important material foundation for the Chang4+5 oil reservoirs,and its distribution range and thickness controlled the overall distribution of the Chang4+5 oil reservoirs.The space distribution of hydrocarbon transportation system consists of fractures with high-dip angle in the direction of east-west near-ly and well-connected sand bodies developed in the Chang4+5 and Chang6 formations influences the spatial distribution of the Chang4+5 oil reservoirs.The high-quality reservoir "sweet spot" transformed by sedimentation and reservoir diagenesis is favorable to the enrichment of the Chang4+5 oil reservoirs.Based on the research of the main controlling factors,the hydrocarbon accumulation patterns of the Chang4+5 oil reservoirs in Yanchi area can be summarized as :Chang7 source rocks provide an important material foundation for the Chang4+5 oil reservoirs.After the oil and gas enter the sand bodies of the Chang4+5 formation through the hydrocarbon transportation system,the reservoirs close to the hydrocarbon transportation system are favorable for oil accumulation preferentially,and oil and gas enriched in the Chang4+5 reservoir "sweet spot" finally.
The Chang4+5 oil reservoirs in the Yanchi area of the Ordos Basin has good development potential,but there are issues such as complicated geological conditions and hydrocarbon accumulation mechanism at the same time.Therefore,it is necessary to study the main controlling factors and hydrocarbon accumulation patterns of them.In view of these issues,the main controlling factors of the Chang4+5 oil reservoirs in the study area were finally determined according to source rocks,transportation system,sedimentary reservoir characteristics and structural characteristics and other geological factors.The source rocks developed well in Chang7 formation provide an important material foundation for the Chang4+5 oil reservoirs,and its distribution range and thickness controlled the overall distribution of the Chang4+5 oil reservoirs.The space distribution of hydrocarbon transportation system consists of fractures with high-dip angle in the direction of east-west near-ly and well-connected sand bodies developed in the Chang4+5 and Chang6 formations influences the spatial distribution of the Chang4+5 oil reservoirs.The high-quality reservoir "sweet spot" transformed by sedimentation and reservoir diagenesis is favorable to the enrichment of the Chang4+5 oil reservoirs.Based on the research of the main controlling factors,the hydrocarbon accumulation patterns of the Chang4+5 oil reservoirs in Yanchi area can be summarized as :Chang7 source rocks provide an important material foundation for the Chang4+5 oil reservoirs.After the oil and gas enter the sand bodies of the Chang4+5 formation through the hydrocarbon transportation system,the reservoirs close to the hydrocarbon transportation system are favorable for oil accumulation preferentially,and oil and gas enriched in the Chang4+5 reservoir "sweet spot" finally.
引文
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[12]张凤奇,张凤博,钟红利,等.鄂尔多斯盆地甘泉南部地区延长组长7致密油富集主控因素[J].岩性油气藏,2016,28(3):12-19.
[13]屈雪峰,温德顺,张龙,等.鄂尔多斯盆地延长组超低渗透油藏形成过程分析——以古峰庄-麻黄山地区为例[J].沉积学报,2017,35(2):383-392.
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[15]付金华,李士祥,刘显阳,等.鄂尔多斯盆地姬塬大油田多层系复合成藏机理及勘探意义[J].中国石油勘探,2013,18(5):1-9.
[16]姚泾利,王克,宋江海,等.鄂尔多斯盆地姬塬地区延长组石油运聚规律研究[J].岩性油气藏,2007,19(3):32-37.
[17]席胜利,李荣西,朱德明,等.鄂尔多斯盆地姬塬地区延长组长4+5低渗透储层成因[J].地质科学,2013,48(4):1164-1176.
[18]钟张起,焦涛,李军建,等.鄂尔多斯盆地姬塬地区延长组成藏主控因素及成藏模式[J].石油地质与工程,2016,30(3):28-31,146.
[19]杨俊杰.鄂尔多斯盆地构造演化与油气分布[M].北京:石油工业出版社,2002.
[20]杨华,张文正.论鄂尔多斯盆地长7段优质油源岩在低渗透油气成藏富集中的主导作用:地质地球化学特征[J].地球化学,2005,34(2):147-154.
[21]张文正,杨华,李剑锋,等.论鄂尔多斯盆地长7段优质油源岩在低渗透油气成藏富集中的主导作用——强生排烃特征及机理分析[J].石油勘探与开发,2006,33(3):289-293.
[22]张文正,杨华,杨伟伟,等.鄂尔多斯盆地延长组长7湖相页岩油地质特征评价[J].地球化学,2015,44(5):505-515.
[23]付金华.鄂尔多斯盆地致密油勘探理论与技术[M].北京:科学出版社,2018.
[24]HUNTER J M.Generation and Migration of Petroleum from Abnormally Pressure Fluid Compartments[J].AAPG Bulletin,1990,74(1):1-12.
[25]陈荷立,汤锡元.山东东营凹陷泥岩压实作用及油气初次运移问题探讨[J].石油学报,1983,4(2):9-16.
[26]杜栩,郑洪印,焦秀琼.异常压力与油气分布[J].地学前缘,1995(4):137-148.
[27]段毅,吴保祥,郑朝阳,等.鄂尔多斯盆地西峰油田油气成藏动力学特征[J].石油学报,2005,26(4):29-33.
[28]解习农,李思田,刘晓峰.异常压力盆地流体力学[M].武汉:中国地质大学出版社,2006.
[29]范玉海,屈红军,王辉,等.鄂尔多斯盆地西部延长组下组合异常压力与油气分布[J].新疆石油地质,2013,34(1):14-16.
[30]姚泾利,段毅,徐丽,等.鄂尔多斯盆地陇东地区中生界古地层压力演化与油气运聚[J].天然气地球科学,2014,25(5):649-656.
[31]刘小琦,邓宏文,李青斌,等.鄂尔多斯盆地延长组剩余压力分布及油气运聚条件[J].新疆石油地质,2007(2):143-145.
[32]席胜利,刘新社,王涛.鄂尔多斯盆地中生界石油运移特征分析[J].石油实验地质,2004,26(3):229-235.
[33]丁文龙,王兴华,胡秋嘉,等.致密砂岩储层裂缝研究进展[J].地球科学进展,2015,30(7):737-750.
[34]王鹏威,陈筱,庞雄奇,等.构造裂缝对致密砂岩气成藏过程的控制作用[J].天然气地球科学,2014,25(2):185-191.
[35]李相博,姚泾利,刘化清,等.鄂尔多斯盆地中生界低幅度隆起构造成因类型及其对油气分布的控制作用[J].现代地质,2013,27(04):755-764+773.
[36]柴童,毕明波,赵卫卫,等.天环坳陷南段延安组低幅度构造预测技术及应用效果[J].油气地质与采收率,2018,25(1):43-48.
[2]杨华,刘显阳,张才利,等.鄂尔多斯盆地三叠系延长组低渗透岩性油藏主控因素及其分布规律[J].岩性油气藏,2007,19(3):1-6.
[3]赵靖舟,白玉彬,曹青,等.鄂尔多斯盆地准连续型低渗透-致密砂岩大油田成藏模式[J].石油与天然气地质,2012,33(6):811-827.
[4]郭彦如,刘俊榜,杨华,等.鄂尔多斯盆地延长组低渗透致密岩性油藏成藏机理[J].石油勘探与开发,2012,39(4):417-425.
[5]赵靖舟,李军,曹青,等.论致密大油气田成藏模式[J].石油与天然气地质,2013,34(5):573-583.
[6]杨华,李士祥,刘显阳.鄂尔多斯盆地致密油、页岩油特征及资源潜力[J].石油学报,2013,34(1):1-11.
[7]杨华,张文正,刘显阳,等.优质烃源岩在鄂尔多斯低渗透富油盆地形成中的关键作用[J].地球科学与环境学报,2013,35(4):1-9.
[8]白玉彬,赵子龙,赵靖舟,等.鄂尔多斯盆地安塞地区长9致密油成藏机理与主控因素[J].中南大学学报:自然科学版,2014,45(9):3127-3136.
[9]赵卫卫,杨云祥,宋和平,等.鄂尔多斯盆地下寺湾地区长7致密油地质特征及成藏主控因素[J].中南大学学报:自然科学版,2014,45(12):4267-4276.
[10]姚泾利,赵彦德,邓秀芹,等.鄂尔多斯盆地延长组致密油成藏控制因素[J].吉林大学学报:地球科学版,2015,45(4):983-992.
[11]姚泾利,徐丽,邢蓝田,等.鄂尔多斯盆地延长组长7和长8油层组流体过剩压力特征与油气运移研究[J].天然气地球科学,2015,26(12):2219-2226.
[12]张凤奇,张凤博,钟红利,等.鄂尔多斯盆地甘泉南部地区延长组长7致密油富集主控因素[J].岩性油气藏,2016,28(3):12-19.
[13]屈雪峰,温德顺,张龙,等.鄂尔多斯盆地延长组超低渗透油藏形成过程分析——以古峰庄-麻黄山地区为例[J].沉积学报,2017,35(2):383-392.
[14]李成,淡卫东,袁京素,等.鄂尔多斯盆地姬塬地区长4+5油藏控制因素及成藏模式[J].中国石油勘探,2016,21(2):45-52.
[15]付金华,李士祥,刘显阳,等.鄂尔多斯盆地姬塬大油田多层系复合成藏机理及勘探意义[J].中国石油勘探,2013,18(5):1-9.
[16]姚泾利,王克,宋江海,等.鄂尔多斯盆地姬塬地区延长组石油运聚规律研究[J].岩性油气藏,2007,19(3):32-37.
[17]席胜利,李荣西,朱德明,等.鄂尔多斯盆地姬塬地区延长组长4+5低渗透储层成因[J].地质科学,2013,48(4):1164-1176.
[18]钟张起,焦涛,李军建,等.鄂尔多斯盆地姬塬地区延长组成藏主控因素及成藏模式[J].石油地质与工程,2016,30(3):28-31,146.
[19]杨俊杰.鄂尔多斯盆地构造演化与油气分布[M].北京:石油工业出版社,2002.
[20]杨华,张文正.论鄂尔多斯盆地长7段优质油源岩在低渗透油气成藏富集中的主导作用:地质地球化学特征[J].地球化学,2005,34(2):147-154.
[21]张文正,杨华,李剑锋,等.论鄂尔多斯盆地长7段优质油源岩在低渗透油气成藏富集中的主导作用——强生排烃特征及机理分析[J].石油勘探与开发,2006,33(3):289-293.
[22]张文正,杨华,杨伟伟,等.鄂尔多斯盆地延长组长7湖相页岩油地质特征评价[J].地球化学,2015,44(5):505-515.
[23]付金华.鄂尔多斯盆地致密油勘探理论与技术[M].北京:科学出版社,2018.
[24]HUNTER J M.Generation and Migration of Petroleum from Abnormally Pressure Fluid Compartments[J].AAPG Bulletin,1990,74(1):1-12.
[25]陈荷立,汤锡元.山东东营凹陷泥岩压实作用及油气初次运移问题探讨[J].石油学报,1983,4(2):9-16.
[26]杜栩,郑洪印,焦秀琼.异常压力与油气分布[J].地学前缘,1995(4):137-148.
[27]段毅,吴保祥,郑朝阳,等.鄂尔多斯盆地西峰油田油气成藏动力学特征[J].石油学报,2005,26(4):29-33.
[28]解习农,李思田,刘晓峰.异常压力盆地流体力学[M].武汉:中国地质大学出版社,2006.
[29]范玉海,屈红军,王辉,等.鄂尔多斯盆地西部延长组下组合异常压力与油气分布[J].新疆石油地质,2013,34(1):14-16.
[30]姚泾利,段毅,徐丽,等.鄂尔多斯盆地陇东地区中生界古地层压力演化与油气运聚[J].天然气地球科学,2014,25(5):649-656.
[31]刘小琦,邓宏文,李青斌,等.鄂尔多斯盆地延长组剩余压力分布及油气运聚条件[J].新疆石油地质,2007(2):143-145.
[32]席胜利,刘新社,王涛.鄂尔多斯盆地中生界石油运移特征分析[J].石油实验地质,2004,26(3):229-235.
[33]丁文龙,王兴华,胡秋嘉,等.致密砂岩储层裂缝研究进展[J].地球科学进展,2015,30(7):737-750.
[34]王鹏威,陈筱,庞雄奇,等.构造裂缝对致密砂岩气成藏过程的控制作用[J].天然气地球科学,2014,25(2):185-191.
[35]李相博,姚泾利,刘化清,等.鄂尔多斯盆地中生界低幅度隆起构造成因类型及其对油气分布的控制作用[J].现代地质,2013,27(04):755-764+773.
[36]柴童,毕明波,赵卫卫,等.天环坳陷南段延安组低幅度构造预测技术及应用效果[J].油气地质与采收率,2018,25(1):43-48.