Study and Application of Fine Dissection Methods for Inter-river Sands in Large Shallow River-controlled Delta Plains

Abstract

Applying the data of coring wells and logging curves of dense well network, identifying the sedimentary sands of different river
systems and contemporaneous periods with the methods of standard layer approximation control and comparison of reference layer combinations, establishing a set of logging phase models of inter-river sands, and using the models as a guideline for micro-phase identification, we
have studied the distribution and combination characteristics of the micro-phase sands of the inter-river sand bodies, as well as the type of
connectivity with the sand bodies of the river and the relationship, and clarified the distribution characteristics and residual oil distribution of
the sand bodies of the inter-river sands. The characteristics of different types of sand body movement and residual oil distribution were clarified, effective dredging methods were proposed, and measures such as oil testing and fracturing were taken, which played an important role in
guiding the adjustment and dredging of oil fields in the late stage of high water content.