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首页> 外文期刊>Journal of Petroleum Science & Engineering >Oil and gas assessment of the Kuqa Depression of Tarim Basin in western China by simple fluid flow models of primary and secondary migrations of hydrocarbons
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Oil and gas assessment of the Kuqa Depression of Tarim Basin in western China by simple fluid flow models of primary and secondary migrations of hydrocarbons

机译：塔里木盆地库车De陷油气的一次，二次油气运移简单流动模型

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The complicated mechanisms governing hydrocarbon expulsion (primary migration) have not as yet been fully understood, though understanding these mechanisms is paramount in basin modeling. This paper presents (a) a simple oil-expulsion model based on the principles of sedimentary compaction and the flow difference between oil and water, and (b) a simple gas-expulsion model via mass balance. These two models do not consider more factors or mechanisms than some existing models, but we verify that the predicated expelled amount is proper by using it as input data for secondary migration and confirming that the modeled volume of accumulated hydrocarbons is close to that determined by exploration. The hydrocarbon migration-accumulation (secondary migration) history is the most important component in basin modeling, but it is also one of the most challenging to achieve. In general, a sectional 2-D simulator cannot predict the amount of hydrocarbon accumulated, whereas a 3-D simulator takes considerable computing time. This paper presents a simplified pseudo 3-D model based on the principles of buoyancy drive and Darcy's Law in combination with the effects of faulting and lithology on migration pathways. Comparing with the existing four models currently in use (multi-phase Darcy flow, flowpath, hybrid method combining the former two approaches together, and invasion percolation), the proposed model is mainly targeted at calculating the quantities and locations of petroleum accumulations for oil and gas assessment, and so the factors taken into account and the functions needed to be executed in software are less than in other models. Application of the aforementioned three models in the Kuqa Depression of the Tarim Basin in western China shows that the simplified pseudo 3-D model is very efficient and less computationally extensive, and the predicted quantities and locations of petroleum accumulations approach those determined by exploration, showing these models could form a useful prospecting method.
机译：尽管了解这些机制在盆地建模中至关重要，但尚未完全了解控制碳氢化合物排泄（一次运移）的复杂机制。本文提出了（a）基于沉积压实原理和油与水之间的流量差的简单排油模型，以及（b）通过质量平衡的简单排油模型。这两个模型没有考虑比某些现有模型更多的因素或机制，但是我们通过将其作为二次运移的输入数据并确认模型中的累计油气量接近于勘探确定的量，验证了预测的驱出量是正确的。油气运移积累（二次运移）历史是盆地建模中最重要的组成部分，但也是实现这一挑战中最具挑战性的部分之一。通常，分段2-D仿真器无法预测碳氢化合物的累积量，而3-D仿真器则需要大量的计算时间。本文基于浮力驱动原理和达西定律，结合断层和岩性对运移路径的影响，提出了一种简化的伪3-D模型。与当前使用的现有四个模型（多相达西流，流路，将前两种方法结合在一起的混合方法以及入侵渗滤）相比，该模型主要针对计算石油和天然气的储量和位置。气体评估，因此考虑的因素和需要在软件中执行的功能要比其他模型少。上述三种模型在中国西部塔里木盆地库车De陷的应用表明，简化的伪3-D模型非常有效，计算量较小，预测的石油成藏数量和位置接近于勘探确定的数量和位置。这些模型可以形成有用的勘探方法。

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