| 准噶尔盆地中部侏罗系油气藏调整改造的地质、地球化学响应 |
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| 引用本文： | 刘建章,邹华耀,李平平,张元春.准噶尔盆地中部侏罗系油气藏调整改造的地质、地球化学响应[J].地球科学,2012,37(3):565-572. |
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| 作者姓名： | 刘建章 邹华耀 李平平 张元春 |
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| 作者单位： | 1.中国地质大学构造与油气资源教育部重点实验室, 湖北武汉 430074 |
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| 基金项目： | 中国石油大学(北京)油气资源与探测国家重点实验室开放研究基金2009008国家自然科学基金41002039构造与油气资源教育部重点实验室开放基金TPR-2011-21-24 |
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| 摘 要： | 准噶尔盆地中部侏罗系油气成藏经历了多源、多期充注和晚期的调整改造.综合运用地质、测井和油藏地球化学等资料, 分析了油气藏经历晚期调整改造后的地质、地球化学响应特征.结果表明: 位于车-莫古隆起北翼的莫西庄、沙窝地地区, 经历反向调整后, 油气藏呈分散和小规模分布, 油气藏类型由以构造-岩性油气藏为主变成以地层/岩性油气藏为主, 且油气水层关系复杂; 油层低孔、低渗, 且低含油饱和度、低电阻率, 原油密度和粘度大; 今油水界面高于古油水界面, 部分水层中含有较高的"非烃+沥青质"; 而位于车-莫古隆起北翼的永进地区, 经历同向调整后, 今油柱高于古油柱, 油气藏规模变大.
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| 关 键 词： | 准噶尔盆地 调整改造 油气藏 油水界面 |
| 收稿时间： | 2011-03-21 |
Response of Geology and Geochemistry to Adjustment and Reconstruction of the Jurassic Reservoirs in the Central Part of Junggar Basin |
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| Abstract: | Junggar basin is a large superposed basin in West China that experienced multi-stage tectonics. Preliminary study indicated that Jurassic reservoirs in the central part of Junggar basin experienced multi-stage hydrocarbon filling from multiple sources and late adjustment and reconstruction. The geologic and geochemical character of the Jurassic reservoir was investigated by integrating data of geology, drilling and geochemistry. The result indicates that reservoirs after reversing adjustment in Shawodi and Moxizhuang blocks located in the north limb of Che-Mo paleo-uplift are usually scattered in a small scale and their type is usually transforming from structural reservoir into stratigraphic/lithologic hydrocarbon reservoir, and have extremely complex oil-water contact or gas-water contact, low porosity and permeability, low oil saturation and resistivity, but heavier oil density and greater viscosity; the paleo oil-gas-water contact determined by grain-containing-oil inclusion (GOI) analysis is lower than the present, and there is a high content of soluble organic matters (i.e. non-hydrocarbon and asphaltine) in present water layers. However, the reservoir which experienced synthetic adjustment in Yongjin block located in the south limb of Che-Mo paleo-uplift has higher paleo oil-water contact verified by GOI value than the present, and paleo oil column is lower than the present. It means that the reservoir scale is expanding. |
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