鄂尔多斯盆地西南部Z区低阻油水层识别方法
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摘要
随着近年来鄂尔多斯盆地西南部侏罗系油藏的规模开发,侏罗系油藏优质储量得到不断动用,而侏罗系低阻油藏成藏隐蔽,勘探开发经验少,油水层识别难度大等问题日趋突出。鄂尔多斯盆地西南部Z区延9油藏为典型的低阻油藏,分析表明,孔隙结构复杂、微孔率高、微孔隙中存在束缚水是导致油层低阻的主要原因,地层水矿化度高也降低了油层电阻率;对比分析了测井曲线形态法、砂层顶构造对比法、侵入因子与声波时差交会图版法、快速色谱录井识别等识别低阻油层方法,并提出了该区有利建产目标。
With the increasing scale development of Jurassic reservoir in southwest of Ordos basin, high quality reserves of Jurassic reservoir were constantly produced, while the low resistance reservoirs were subtle reservoirs, there was little experience in development and exploration, oil or water layer identification was becoming in creasingly prominent. Yan-9 reservoir of Z block was a typical low resistance reservoir in southwest of Ordos basin. Analysis indicated that the pore structure was complex, the micropore rate was high and the water in the micropores was the main reason for the low resistance of the reservoir, the high degree of formation water mineralization also reduced the resistivity of the oil layer. Contrast analysis of the logging curve method, the sand layer roof structure comparison method, invasive factor and acoustic time difference intersection engraving method, fast chromatographic logging identification method in identifying the low resistance reservoir were carried out, and then favorable production targets were put forward.
With the increasing scale development of Jurassic reservoir in southwest of Ordos basin, high quality reserves of Jurassic reservoir were constantly produced, while the low resistance reservoirs were subtle reservoirs, there was little experience in development and exploration, oil or water layer identification was becoming in creasingly prominent. Yan-9 reservoir of Z block was a typical low resistance reservoir in southwest of Ordos basin. Analysis indicated that the pore structure was complex, the micropore rate was high and the water in the micropores was the main reason for the low resistance of the reservoir, the high degree of formation water mineralization also reduced the resistivity of the oil layer. Contrast analysis of the logging curve method, the sand layer roof structure comparison method, invasive factor and acoustic time difference intersection engraving method, fast chromatographic logging identification method in identifying the low resistance reservoir were carried out, and then favorable production targets were put forward.
引文
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[2]李波,吴小波,耿晓飞,等.王集地区油水层识别方法研究[J].石油地质与工程,2016,31(2):103–105.
[3]陈萍,西涛涛,张凡,等.春光油田春10井区沙湾组油水层识别方法研究[J].石油地质与工程,2014,28(5):47–49.
[4]温忍学,王军锋,张慧芸,等.电阻率增大值法在胡状集油田判别低阻油层中的应用[J].断块油气田,2002,9(2):43–46.
[5]刘超威.鄂尔多斯盆地姬塬地区长2低阻油层分布及成藏控制因素研究[D].四川成都:西南石油大学,2015.
[6]任光军.关于气测录井数据的应用探讨[J].录井技术,2012,14(3):5–11.
[7]任菊玲.快速色谱录井技术应用探讨[J].吐哈油气,2010,15(4):321–325.
[8]杨玉祥.鄂尔多斯盆地北部FF区低阻油气层评价方法[J].西安石油大学学报(自然科学版),2010,25(5):1–4.
[9]高银山,左琴,刘敏昭,等.姬塬油田H区块产建随钻地质研究[J].石油化工应用,2012,31(3):79–81.
[10]史德锋,旷理熊,黄文俊,等.陕北绥靖油田延安组延9油组油气成藏控制因素[J].石油地质与工程,2011,25(4):4–6.