普光气田储集层成岩作用及孔隙演化
RESERVOIR DIAGENESIS AND PORE EVOLUTION IN PUGUANG GASFIELD
任利剑 张春生 刘德智 赵逸清
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作者单位：长江大学地球科学学院
中文关键字： 低渗透储集层 成岩作用 孔隙演化 普光气田
英文关键字：low-permeability reservoir, diagenesis, pore evolution, Puguang gasfield
中文摘要： 以普光气田碳酸盐岩储集层岩性与物性分析为基础，通过野外露头剖面观测、单井岩心观察，样品测试等手段，对其成岩作用、孔隙类型、孔隙演化及其特征进行了详细研究。研究区的成岩作用分为三类：建设性成岩作用、破坏性成岩作用以及双重性成岩作用。研究区储层中的孔隙演化经历了同生、早、中、晚四期成岩作用阶段,碳酸盐岩原生孔隙消失殆尽，次生孔隙为主要储集空间，次生孔隙的发育程度取决于三种成岩作用的相对强度。
英文摘要：Based on the analysis of the carbonate reservoir lithology and physical property of Puguang gasfield, we detailedly study the diagenesis, pore type, pore evolution and reservoir characteristics by outcrop, core and sample. Diagenesis in the studied area is classified into three types: constructive diagenesis, destructive diagenesis and constructive—destructive diagenesis. The pore evolution underwent syngenesis-, early- , middle - and late- diagenesis. The second pore is the main accumulation space whereas the primary pore has almost disappeared. The development of second pore depends on the relative intensity of three types of diagenesis.