论文部分内容阅读
本文系根据任丘油田雾迷山组及奥陶系岩矿薄片资料研究碳酸盐岩成岩后生作用,认为本区主要有:白云岩化、硅化、压实压溶、重结晶、溶蚀及充填、构造应力等成岩后生作用。现以雾迷山组及奥陶系的成岩后生作用结合本区地质发展史讨论碳酸盐岩储层演化。基于上述基本分析,认为碳酸盐岩储集空间以次生为主,虽然经受多次风化淋滤溶蚀作用,但以中生代及第三系沉积之前,风化剥蚀岩溶作用最为强烈,是造成本区碳酸盐岩溶蚀缝洞孔发育的重要原因。
In this paper, we study the diagenesis of carbonate rocks according to the thin sections of the Wumishan Formation and Ordovician rocks in Renqiu Oilfield. It is believed that there are mainly dolomitization, silicification, compaction pressure solution, recrystallization, dissolution and filling , Tectonic stress and other diagenesis. The evolution of carbonate reservoirs is discussed with the diagenesis and post-diagenesis of the Wumishan Formation and Ordovician, taking into account the geological history of the area. Based on the basic analysis above, it is considered that the carbonate reservoir is mainly secondary in nature. Although it has undergone multiple weathering and leaching dissolutions, the weathered and denudated karstification was the strongest before Mesozoic and Tertiary deposition, An important reason for the development of carbonate caverns.