【摘要】 轮南地区是塔里木盆地重点产油气区之一.已从多口井的下奥陶统碳酸盐岩中获工业性油气流,一些井的产量还相当高.该区下奥陶统碳酸盐岩油气藏属以溶蚀孔洞和构造裂缝为主要储集空间的古潜山油气藏.该区经历的构造运动期次多,原生油藏遭破坏,成岩后生作用复杂,储层非均质性强,统计规律不明显,因此,对本区油气储量的前景很难预测.通过阅读大量现有资料,同时以薄片和岩心观察、分析结果为依据,从影响碳酸盐岩储层的岩石学特征、沉积环境、成岩环境等因素入手,讨论了轮南地区储集层的性能和分布以及成岩作用和孔隙演化特征,基本搞清了该区成藏条件和控油因素:构造作用决定了储集条件的初始分布特征和储层的特点,成岩作用则对储集条件的改善及油气的最后聚集起到了决定作用.更多还原

【Abstract】 Lunnan area is one of the most important oil and gas fields in Tarim basin. Industrial hydrocarbon flow has been obtained from several wells of carbonate in lower Ordovician, some wells are even high capacity wells. Lower Ordovician cabonatite reservoir is a buried hill one, in which caves and solution holes and structural-seams act as main reservoir types. In this area, tectonic movements happen frequently, primary reservoirs were destroyed. Complex post-diagenesis, strong reservoir heterogeneity and obvious uncertainty of statistical rule lead to be difficult to predict the reserves. The paper studies the characteristics and distribution of reservoir, as well as diagenesis and porosity evolution through reading many available data and basing on the results of observing and analyzing cores ,which makes clear the conditions of forming reservoir and factors of controlling oil basically. Original distribution and characteristics of reservoir are controlled by tectonism and diagenesis plays determinative role in improving of reservoir conditions and in ultimate collecting of oil and gas.更多还原