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OALib Journal期刊
ISSN: 2333-9721
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鄂尔多斯盆地镇泾地区中生界油气二次运移动力研究
Keywords: 二次运移,浮力,异常压力,镇泾地区,鄂尔多斯盆地
Abstract:
？鄂尔多斯盆地西南缘镇泾地区中生界油藏具有储层致密、丰度低、储量大的特点，已钻遇的多口高产井显示出中生界具有良好的油气勘探潜力。西南缘中生界具有多个油气成藏动力系统，不同的油气成藏动力系统具有不同的二次运移动力和通道。通过埋藏史、泥岩压实曲线及物性特征等研究，认为长8段超低渗透油藏的二次运移动力为上覆烃源岩的异常压力，通道主要为渗透层；长6段特低渗透油藏的二次运移动力主要为下伏烃源岩的异常压力，局部为浮力，通道主要为裂缝，其次为渗透层；而延安组油藏的二次运移动力为浮力，通道为裂缝、不整合面和渗透层。对油气二次运移动力和通道的研究，可以更加精细追踪油气运移指向，为鄂尔多斯盆地西南缘下一步的油气勘探提供理论依据。
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