【摘要】 利用岩心观察、钻井、测井(常规测井、成像测井)、薄片鉴定、物性分析等技术,对赛汉塔拉凹陷基底潜山储集层的发育特征进行了分析,并利用地震属性分析的方法对储集层进行了平面预测。研究结果表明,赛汉塔拉凹陷基底岩性主要为灰岩和变质岩,其储集空间主要为裂缝、溶蚀孔洞等次生孔隙。灰岩潜山储集层在纵向上可以划分为表层岩溶带、渗流岩溶带和潜流岩溶带,而变质岩潜山可以划分为表层风化破碎带和裂缝、溶蚀孔洞发育带。两种岩性的潜山以表层带的储集性能最为良好,其在平面上的分布主要受断裂和裂缝发育程度的控制。钻井资料的标定和理论上的分析表明,表层带储集层在地震资料上具有低振幅、低相关系数的特征,而内幕岩溶则主要具有强振幅的特征,利用地震属性能够对潜山储层进行有效的识别。在对潜山储集层特征分析的基础上,认为控制潜山储集层发育的主要因素为岩性、断裂和距潜山顶面的深度等。更多还原

【Abstract】 The developing feature of buried-hill reservoir in basement of Saihantala sag was analyzed by using such technical data and methods as core observation, drilling, logging (conventional and imaging logging), slice identification and physical analysis, and planar prediction of reservoir was carried out by using analysis of seismic attributes. The studied results indicated that the lithology of basement in Saihantala sag is mainly the limestone and metamorphics, and space of reservoir is mainly secondary pores such as fracture and solution cave etc. The limestone buried-hill can be divided into surface karst belt, vadose karst zone and disappearing stream karst zone longitudinally; and metamorphics buried-hill can be divided into surface weathered broken zone and fracture, and karst cave developing zone. In these two lithologic buried-hills, the reserve property of superficial belt is better and planar distribution is mainly controlled by the development of faults and fracture. After calibration of drilling data and theoretical analysis, the superficial reservoir is characterized by weak amplitude and low correlation coefficient in seismic data, and interior karat is mainly characterized by strong amplitude, so using seismic attributes can effectively identify the development of buried-hill reservoir. On the basis of analyzing the feature of buried-hill reservoir, we considered that major factors controlling development of buried-hill reservoir are lithology, fault and depth to top interface of buried-hill.更多还原