【摘要】 根据多年来对鄂尔多斯地区和塔里木盆地有关油气田的研究成果和近年来的国内外相关资料,用"古风化壳储集层(体)"的观点系统详细地阐述了碳酸盐岩古风化壳储集层(体)的形成、岩相、岩溶、地球化学、储集性能、演化等特点。古风化壳具有岩溶分带性特点,是一个由表生成岩作用形成的特有的地质体,因而,不等同于不整合面和侵蚀面。典型的碳酸盐岩古风化壳储集层(体)可划分为4个带:破碎带、渗流带、混合带、潜流带,其演化与沉积旋回、海平面的振荡运动和局部构造运动有密切的关系。指出可以利用碳酸盐岩古风化壳储集层(体)测井曲线和地震勘探的响应来识别溶洞和裂缝;运用模糊数学方法对其进行分区、分带的评价,运用多学科和多种技术方法对其进行研究和预测。更多还原

【Abstract】 On the basis of our work in the carbonate exploration areas of the Ordos Region and Tarim Basin and the related literatures worldwide in recent years, a new concept of "carbonate paleo-weathered crust reservoirs (body) ", which is different from the geological meanings of unconformity and erosion, has been proposed in this paper. Using the concept, the origin, facies, karst, geochemistry, formation processes and physical capabilities and evolution of the carbonate reservoirs are systematically expounded in this paper. It has been considered that the carbonate paleo-weathered crust reservoirs to be varying zonations of karst vertically and a distinctive geological system of epidiagenesis. A typical carbonate paleo-weathered crust reservoir can be divided into four zones from surface to shallow depth which are fracture zones, vadose zones, mixing zones and phreatic zones. The evolution of the carbonate paleo-weathered crust reservoirs is closely associated with depositional cycles, sea level fluctuates and local structure movements. The methods and technologies for studying, predication and evaluation of the carbonate paleo-weathered crust reservoirs, using well log, seismic responds and fuzzy mathematics calculation, has been pointed out in the paper.更多还原