论文部分内容阅读
鄂尔多斯盆地下奥陶统碳酸盐岩储层是成岩期白云岩化，表生期古岩溶和后生期深埋溶解作用叠加改造的结果．深理溶解作用既可通过扩大改造光期孔洞缝形成溶蚀扩大孔隙体系，亦可通过溶蚀碳酸盐产生新增孔隙体系，从而大大提高了碳酸盐储层储集条件．根据孔隙结构特征，区内碳酸监岩储层深埋次生孔隙可划分为１７种类型，它们是富含有机酸、ＣＯ２和Ｈ２Ｓ的具有化学侵蚀性的酸性地下成岩流体与碳酸盐之间相互作用的产物．无论在沉积学还是沉积地球化学方面，该类次生孔隙均与其它成因孔隙存在明显异性
The Lower Ordovician carbonate reservoirs in the Ordos Basin are the result of superposition and remodeling of dolomitization in the diagenetic stage, palaeokarst in the epoch period and deep-burial dissolution in the epigenetic stage. Deeply understanding dissolution can both enlarge and reconstruct photoperiod holes to form dissolution and enlargement pore systems and also create new pore systems by dissolution of carbonate, thereby greatly increasing the reservoir conditions for carbonate reservoirs. According to the characteristics of pore structure, the deep secondary pores of carbonatite reservoirs in the area can be divided into 17 types, which are between the chemically-rich acidic underground diagenetic fluids and carbonates that are rich in organic acids, CO2 and H2S The product of interaction. No matter in sedimentology or sedimentary geochemistry, these secondary pores are significantly different from other genetic pores