| 银额盆地哈日凹陷Y井天然气产层时代厘定及其意义 |
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| 引用本文： | 卢进才,宋博,牛亚卓,魏仙样,魏建设,许海红.银额盆地哈日凹陷Y井天然气产层时代厘定及其意义[J].地质通报,2018,37(1):93-99. |
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| 作者姓名： | 卢进才 宋博 牛亚卓 魏仙样 魏建设 许海红 |
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| 作者单位： | 中国地质调查局西安地质调查中心, 陕西 西安 710054 |
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| 基金项目： | 中国地质调查局项目《银额盆地及邻区石炭—二叠系油气远景调查》（编号：121201112096）和《银额盆地及周缘油气基础地质调查》（编号：121201152201） |
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| 摘 要： | 银额盆地哈日凹陷Y井钻遇多层天然气显示层,并对井深2946.0~2951.0m井段射孔压裂,获天然气9.15×104m3/d(无阻流量)。对浅层天然气显示层确定为白垩系银根组无异议,但获得工业气流的产层时代归属尚存争议。通过镜质体反射率(Ro)随深度的变化规律的研究,以及利用钻井岩心实验分析获得泥岩地球化学特征对沉积物源区沉积环境的判别,约束了二叠系与白垩系巴音戈壁组的不整合界面位于第9次取心(岩心底深2593.80m)与第10次取心(岩心顶深2909.60m)之间;地球物理测井自然伽马、电阻率等曲线在2792.0m出现突变,确定二叠系与白垩系巴音戈壁组的不整合界面为2792.0m。明确了Y井天然气产层为二叠系,指示了二叠系良好的油气资源前景,区内今后油气勘探应以二叠系为主要目的层。
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| 关 键 词： | 哈日凹陷 银额盆地 天然气产层 不整合界面 二叠系 白垩系 |
| 收稿时间： | 2017/7/20 0:00:00 |
| 修稿时间： | 2017/9/20 0:00:00 |
The age constraints on natural gas strata and its geological signficance of Well Y in Hari depression, Yingen-Ejin basin |
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| LU Jincai,SONG Bo,NIU Yazhuo,WEI Xianyang,WEI Jianshe and XU Haihong.The age constraints on natural gas strata and its geological signficance of Well Y in Hari depression, Yingen-Ejin basin[J].Geologcal Bulletin OF China,2018,37(1):93-99. |
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| Authors: | LU Jincai SONG Bo NIU Yazhuo WEI Xianyang WEI Jianshe and XU Haihong |
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| Institution: | Xi''an Geological Survey Center, China Geological Survey, Xi''an 710054, Shaanxi, China |
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| Abstract: | Well Y intersects several natural gas strata in Hari depression, Yingen-Ejin basin. It is characterized by open flow capacity of 91500m3 natural gas per day after hydra perforating and fracturing between 2946.5m and 2951.0m. This paper has no suspect on the oil source of the superficial zone of this well, which came from the Cretaceous Yin''gen Formation. Additionally, there exists controversy on the stratigraphic age of the industrial gas flow. Based on the Roversus depth correlation and geochemical characteristics discrimination of well mudstones, the unconformity between the Permian and the Cretaceous Bayin''gebi Formation was identified in the depth between 2593.80m and 2909.60m. Meanwhile, the gamma ray and specific resistance curve of the geophysical log revealed obvious changes at the 2792.0m of the tenth coring. Moreover, this research confirms that 2792.0m is the unconformity between the Permian and Cretaceous Bayin''gebi Formation. Particularly, it means that the natural gas derived from Permian has good hydrocarbon prospects. The oil-gas exploration in future should mainly focus on the Permian strata. |
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| Keywords: | Hari depression Yingen-Ejin basin natural gas reservoir unconformity interface Permian Cretaceous |
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