Abstract:

M area in Nanpu Oilfield is the main water injection development block of Jidong Oilfield, and it has entered the middle water cut stage at present. The water injection effect in the main area is remarkable, but in some areas, the effect is not obvious due to the unclear understanding of inter-well sand body connectivity, and the utilization degree of water injection reserves is low. An accurate evaluation of inter-well sand body connectivity is of great significance for improving injection and production well pattern and enhancing oil recovery in this area. The sand bodies in this area change rapidly in transverse direction, and the number of layers in longitudinal direction is large and small, thus it is difficult to recognize the inter-well sand body connectivity. In order to solve this problem, the inter-well sand body connectivity is evalued by the multi-disciplinary comprehensive technology including including seismic phase technology, seismic attribute technology, seismic inversion technology and reservoir performance analysis technology. With the combination of well, seismic and reservoir, this technology has been widely used to determine the inter-well sand body connectivity in this area, and achieved good results in development practice. The research improves the accuracy of inter-well sand body connectivity evaluation, and provides a favorable basis for guiding reservoir development adjustment in this area. It is of good reference for the evaluation of the inter-well sand body connectivity in the same type reservoir.

Key words: Nanpu Oilfield, inter-well sand body connectivity, combination of well,seismic and reservoir, seismic phase technology, seismic attribute technology, seismic inversion technology, reservoir performance analysis technology