Remaining Oil Analys And Sedimentary Facies Of Gaotaizi Reservior Of Typical Blocks In Sazhong Oilfields

Saertu oil field has entered the ultra-high water cut production stage, With the development and advancement of tertiary recovery, Water drive recoverable reserve will become less and less, the Gaotaizi reservoir is gradually becoming the main object of adjustment of water flooding and comprehensive development, For the remaining oil distribution is complex, difficult to describe, which need to dissect sandbodies, study through a clear understanding of the heterogeneity of the reservoir, analyze potentiality of remaining oil in detail, explore the method of water control and potential tapping,so as to meet the needs of Gaotaizi reservoir fine potential tapping.Gaotaizi reservoir in Saertu oilfield is delta front subfacies sedimentary sand body, which is mainly subaqueous distributary channel and delta front sheet sand microfacies. Based on the detailed study of reservoir thickness, logging curve features, lithologic character, sandbodies and depositional genesis, subaqueous distributary channel and delta front sheet sand microfacies are subdivided into4relatively homogeneous units, so as to further reveals the channel sand and sheet internal heterogeneity. Useing core data of Nanyiqudong development block, relatively homogeneous unit logging microfacies models are established after analysis of rock electricity relation; Guided by sedimentology theory, through fine identification and combination of each well and layer, every plane sedimentary microfacies of the studied area is drew by makeing full use of dense well network logging data;Through research on seismic waveform mode, narrow channel sand body is described by use of depositional integrating wells with seismic data. and delta inner front depositional model is established, the fine anatomical methods of sedimentary sandbody are formed and the sandstone distribution is described. Based on comprehensive application of sedimentary microfacies fine characterization results and production data, combining dynamic and static information, high water channel is identified, the potential remaining oil is researched, and these methods are used to guide for water control and potential tapping and has a good effect.