小层尺度储层质量对致密砂岩油分布的影响——以华庆地区延长组长8_1油藏为例
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摘要
以鄂尔多斯盆地华庆地区三叠系延长组长8_1致密砂岩油藏为例,综合利用露头、岩心、测井及生产动态等多种资料,结合成岩演化及成藏史,恢复鄂尔多斯盆地华庆地区三叠系延长组长8_1成藏时期小层尺度的石油运聚格架,通过对储层质量展布以及流体差异分布的对比,探讨小层尺度石油差异分布的机理。研究结果表明,源储距离在垂向上控制着砂体的含油性,储层质量影响同一小层含油砂体内部石油的差异分布。研究后认为,研究区长8_1内各小层分流河道砂体及河口坝砂体中心位置储层质量相对较好,有利于石油的输导和聚集。
To understand the differential distribution of hydrocarbons in tight sandstone reservoirs, with the case study of Triassic Yanchang Formation, the Chang 8_1 tight sandstone reservoir in the Huaqing area, Ordos Basin. Datas based on outcrops, cores, well logs, and production are utilized to delineate the distributions of the sedimentary facies, favorable reservoirs, and fluid differentials. Combined with diagenesis and reservoir history, the hydrocarbon migration and accumulation framework were reconstructed in the scales of samll layers for the Triassic Yangchang Formation Chang 8_1 in the Huaqing area, Ordos Basin. The results show that the differential distribution of the oil within the reservoirs is controlled by the reservoir properties and source-reservoir distance. The source-reservoir distance controls the oil content of sand body in vertical direction. Meanwhile, the quality of reservoir affects the different distribution of oil in the same small oil sands. The best reservoir properties situate in the distributary channel and mouth bars, which possess favorable conditions for migration or accumulation.
To understand the differential distribution of hydrocarbons in tight sandstone reservoirs, with the case study of Triassic Yanchang Formation, the Chang 8_1 tight sandstone reservoir in the Huaqing area, Ordos Basin. Datas based on outcrops, cores, well logs, and production are utilized to delineate the distributions of the sedimentary facies, favorable reservoirs, and fluid differentials. Combined with diagenesis and reservoir history, the hydrocarbon migration and accumulation framework were reconstructed in the scales of samll layers for the Triassic Yangchang Formation Chang 8_1 in the Huaqing area, Ordos Basin. The results show that the differential distribution of the oil within the reservoirs is controlled by the reservoir properties and source-reservoir distance. The source-reservoir distance controls the oil content of sand body in vertical direction. Meanwhile, the quality of reservoir affects the different distribution of oil in the same small oil sands. The best reservoir properties situate in the distributary channel and mouth bars, which possess favorable conditions for migration or accumulation.
引文
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[25] 付金华,柳广弟,杨伟伟,等.鄂尔多斯盆地陇东地区延长组低渗透油藏成藏期次研究[J].地学前缘,2013,20(2):125-131.
[26] 邓秀芹,刘新社,李士祥.鄂尔多斯盆地三叠系延长组超低渗透储层致密史与油藏成藏史[J].石油与天然气地质,2009,30(2):156-161.
[27] 叶博,梁晓伟,宋娟,等.鄂尔多斯盆地演武地区侏罗系延安组油藏成藏特征[J].岩性油气藏,2018,30(4):65-73.
[28] 刘明洁,刘震,刘静静,等.鄂尔多斯盆地上三叠统延长组机械压实作用与砂岩致密过程及对致密化影响程度[J].地质论评,2014,60(3):655-665.
[29] 潘高峰,刘震,赵舒,等.砂岩孔隙度演化定量模拟方法——以鄂尔多斯盆地镇泾地区延长组为例[J].石油学报,2011,32(2):249-256.
[2] 姚泾利,邓秀芹,赵彦德,等.鄂尔多斯盆地延长组致密油特征[J].石油勘探与开发,2013,40(2):150-158.
[3] 邹才能,翟光明,张光亚,等.全球常规-非常规油气形成分布、资源潜力及趋势预测[J].石油勘探与开发,2015,42(1):13-25.
[4] 林森虎,邹才能,袁选俊,等.美国致密油开发现状及启示[J].岩性油气藏,2011,23(4):25-32.
[5] 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.
[6] 屈红军,杨县超,曹金舟,等.鄂尔多斯盆地上三叠统延长组深层油气聚集规[J].石油学报,2011,32(2):243-248.
[7] 陈世加,路俊刚,姚泾利,等.鄂尔多斯盆地华庆地区长8油层组成藏特征及控制因素[J].沉积学报,2012,30(6):1130-1139.
[8] HINDLE A D.Petroleum migration pathways and charge concentration:A three-dimensional model[J].AAPG bulletin,1997,81(9):1451-1481.
[9] 姚泾利,李勇,陈世加,等.定边—吴起地区长61储层特征及其对含油性的控制[J].岩性油气藏,2018,30(4):56-64.
[10] 罗晓容,张立宽,雷裕红,等.储层结构非均质性及其在深层油气成藏中的[J].中国石油勘探,2016,21(1):28-36.
[11] MIALL A D,TYLER N.The three-dimensional facies architecture of terrigeneous clastic sediments and its implications for hydrocarbon discovery and recovery[J].Soc Eco Paleontol Mineral Conc Sedimentol Paleontol,1991,3:6-12.
[12] 吴胜和,翟瑞,李宇鹏.地下储层构型表征:现状与展望[J].地学前缘,2012,19(2):15-23.
[13] 岳大力,吴胜和,刘建民.曲流河点坝地下储层构型精细解剖方法[J].石油学报,2007,28(4):99-103.
[14] 吴胜和,纪友亮,岳大力,等.碎屑沉积地质体构型分级方案探讨[J].高校地质学报,2013,19(1):12-22.
[15] 宋国奇,纪友亮,赵俊青.不同级别层序界面及体系域的含油气性[J].石油勘探与开发,2003,30(3):32-35.
[16] 罗忠.层序界面对砂岩成岩作用及储层质量的影响——以鄂尔多斯盆地延河露头上三叠统延长组为例[J].沉积学报,2007,25(6):903-914.
[17] 赵洪,罗晓容,肖中尧,等.塔里木盆地哈得逊油田东河砂岩隔夹层特征及其石油地质意义[J].天然气地球科学,2014,25(6):824-833.
[18] LEI Y,LUO X,S0NG G,et al.Quantitative characterization of connectivity and conductivity of sandstone carriers during secondary petroleum migration,applied to the Third Member of Eocene Shahejie Formation,Dongying Depression,Eastern China[J].Marine and Petroleum Geology,2014,51:268-285.
[19] 张厚福,徐兆辉.从油气藏研究的历史论地层-岩性油气藏勘探[J].岩性油气藏,2008,20(1):114-123.
[20] SCHOWALTER T T.Mechanics of secondary hydrocarbon migration and entrapment[J].AAPG bulletin,1979,63(5):723-760.
[21] 刘自亮,朱筱敏,廖纪佳,等.鄂尔多斯盆地西南缘上三叠统延长组层序地层学与砂体成因研究[J].地学前缘,2013,20(2):1-9.
[22] 刘自亮,沈芳,朱筱敏,等.浅水三角洲研究进展与陆相湖盆实例分析[J].石油与天然气地质,2015,36(4):596-604.
[23] 曾源,陈世加,李士祥,等.鄂尔多斯盆地正宁地区长8油层组储层特征[J].岩性油气藏,2017,29(6):32-42.
[24] 朱筱敏,邓秀芹,刘自亮,等.大型拗陷湖盆浅水辫状河三角洲沉积特征及模式:以鄂尔多斯盆地陇东地区延长组为例[J].地学前缘,2013,20(2):19-28.
[25] 付金华,柳广弟,杨伟伟,等.鄂尔多斯盆地陇东地区延长组低渗透油藏成藏期次研究[J].地学前缘,2013,20(2):125-131.
[26] 邓秀芹,刘新社,李士祥.鄂尔多斯盆地三叠系延长组超低渗透储层致密史与油藏成藏史[J].石油与天然气地质,2009,30(2):156-161.
[27] 叶博,梁晓伟,宋娟,等.鄂尔多斯盆地演武地区侏罗系延安组油藏成藏特征[J].岩性油气藏,2018,30(4):65-73.
[28] 刘明洁,刘震,刘静静,等.鄂尔多斯盆地上三叠统延长组机械压实作用与砂岩致密过程及对致密化影响程度[J].地质论评,2014,60(3):655-665.
[29] 潘高峰,刘震,赵舒,等.砂岩孔隙度演化定量模拟方法——以鄂尔多斯盆地镇泾地区延长组为例[J].石油学报,2011,32(2):249-256.
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