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首页> 外文期刊>Journal of Natural Gas Geoscience >Types and characteristics of carbonate reservoirs and their implication on hydrocarbon exploration: A case study from the eastern Tarim Basin, NW China
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Types and characteristics of carbonate reservoirs and their implication on hydrocarbon exploration: A case study from the eastern Tarim Basin, NW China

机译：碳酸盐岩储层的类型，特征及其对油气勘探的意义-以西北塔里木盆地为例

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Carbonate rocks are deposited in the Ordovician, Cambrian, and Sinian of eastern Tarim Basin with a cumulative maximum thickness exceeding 2000 m. They are the main carriers of oil and gas, and a great deal of natural gas has been found there in the past five years. Based on lithofacies and reservoir differences, natural gas exploration domains of eastern Tarim Basin can be classified into five types: Ordovician platform limestone; Ordovician platform dolomite; Cambrian platform margin mound shoal; Cambrian slope gravity flow deposits, and; Sinian dolomite. Carbonate reservoir characteristics of all the types were synthetically analyzed through observation on drilling core and thin sections, porosity and permeability measurement, and logging data of over 10 drilling wells. We find distribution of part of good fracture and cave reservoir in carbonate platform limestone of Ordovician. In the Ordovician, platform facies dolomite is better than limestone, and in the Cambrian, platform margin mound shoal dolomite has large stacking thickness. Good quality and significantly thick carbonate gravity deposit flow can be found in the Cambrian slope, and effective reservoir has also been found in Sinian dolomite. Commercial gas has been found in the limestone and dolomite of Ordovician in Shunnan and Gucheng areas. Exploration experiences from these two areas are instructive, enabling a deeper understanding of this scene.
机译：碳酸盐岩沉积在塔里木盆地东部的奥陶纪，寒武纪和震旦纪，累积最大厚度超过2000 m。它们是石油和天然气的主要载体，并且在过去五年中在那里发现了大量的天然气。根据岩相和储集层差异，塔里木盆地东部的天然气勘探领域可分为五种类型：奥陶纪台地灰岩;奥陶纪台地灰岩;奥陶系台地灰岩。奥陶纪平台白云岩;寒武纪台缘丘滩;寒武纪斜坡重力流沉积物;以及震旦系白云岩。通过观察岩心和薄片，孔隙率和渗透率测量以及十多个钻井的测井数据，综合分析了所有类型的碳酸盐岩储层特征。我们在奥陶系碳酸盐台地石灰岩中发现了部分良好的裂缝和溶洞储层的分布。在奥陶纪，台地相白云岩比石灰岩好，而在寒武纪上，台缘土堆浅滩白云岩具有较大的堆积厚度。在寒武纪斜坡中发现了优质的碳酸盐重力沉积流，并且在震旦纪白云岩中也发现了有效的储层。在顺南和古城地区的奥陶纪石灰岩和白云岩中发现了商业气体。这两个领域的探索经验具有启发性，可以使您对该场景有更深入的了解。

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