渝东南彭水—武隆地区常压页岩气生产特征
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何希鹏(1970—),男,云南宣威人,高级工程师,硕士,从事非常规油气勘探开发与管理工作。联系电话:(025)58611158,E-mail: hexp.hdsj@sinopec.com。

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国家科技重大专项“彭水地区常压页岩气勘探开发示范工程”(2016ZX05061),中国石化科技部项目“渝东南盆缘转换带页岩气 富集主控因素研究”(P18057-2)。


Production characteristics of normal pressure shale gas in Pengshui-Wulong area,southeast Chongqing
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    摘要:

    渝东南彭水—武隆地区五峰组—龙马溪组为常压地层,通过野外剖面调查、钻井岩心观察及页岩实验测试 等,结合5口常压页岩气井试采数据,系统分析常压页岩气的地质及生产特征。研究结果表明,研究区五峰组—龙 马溪组优质页岩为深水陆棚沉积,具有厚度大(大于20 m),总有机碳含量高(为2%~6%),硅质含量高(大于45%), 物性中等(孔隙度为2%~5%),微裂缝发育,保存条件中等,页岩气藏为常压(地层压力系数为0.8~1.2)等地质特 征。分析彭水—武隆地区页岩气井生产过程中的返排特征、流体性质、产气量及压力变化规律等,认为常压页岩气 具有自喷、诱喷和人工举升3种生产模式,可以划分为低气液比、两相过渡、稳定生产3个生产阶段,且进入稳定生 产期,常压页岩气具有初期产量较低,但递减较慢的特征。

    Abstract:

    The Wufeng and Longmaxi Formation in Pengshui-Wulong area of southeast Chongqing is a normal pressure formation. The geological characteristics and production characteristics of normal pressure shale gas were systematically analyzed based on field geological survey,observation of cores from shale wells,shale tests,and production data of 5 normal pressure shale gas wells. The Wufeng and Longmaxi Formation in Pengshui-Wulong area was deposited in deep continental shelf with large thickness(more than 20 meters),high total organic carbon content(about 2%-6%),high siliceous content(more than 45%),medium physical property(porosity 2%-5%),micro-fissure development,medium preservation condition and normal pressure(formation pressure coefficient 0.8-1.2). According to the characteristics of flowback,fluid properties,production and pressure variation in the process of shale gas well production in Pengshui-Wulong area,the normal pressure shale gas has three production modes-natural flowing,induced flowing and artificial lifting. Three stages can be divided as low gas-liquid ratio stage,two-phase transition stage and stable production stage. Entering the stable production stage,the normal pressure shale gas has the characteristics of low initial production and slow decline rate.

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何希鹏,张培先,房大志,梅俊伟,何贵松,卢比.渝东南彭水—武隆地区常压页岩气生产特征[J].油气地质与采收率,2018,25(5):72~79

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  • 在线发布日期: 2018-09-13