RESEARCH ON DIAGENETIC EVOLUTIVE SUCCESSION AND OCCURRENCE OF SECONDARY POROSITY OF LOWER TERTIARY IN DIFFERENT STRUCTURAL BELT OF DONGYING DEPRESSION
东营凹陷各构造区带下第三系成岩演化与次生孔隙发育规律研究

Based on the study of Tertiary diagenetic evolutive successive and diagenetic characteristics in Dongying depression, the zone numbers of secondary porosity and their depth ranges of all the structural belts have been pointed out, the major controlling factors on secondary porosity are analyzed and the occurrence of secondary porosity in each structural belt are summarized in this article. Humic acids and carbon dioxide generated from matured organic matter (part of carbone dioxide from inorganic matter)and H~( ) coming from clay minerals' transition are the general factors, but there are also the additional factors in different structural belt: in northern steep slope area, they are mainly meteoric water and formation water coming from deep; in southern gentle slope area, referring to unconformity;in central uplift area, formation water coming from deep; in sag, abnormal overpressure.