Analysis of Fluvial Sand Connectivity with Production and Seismic Data

PL oilfield in Bohai Bay is a large fluvial oil field. During water injection and oil production, it is necessary to analyze accurately the sand connectivity between injectors and producers to optimize well patterns and improve oil recovery factor. While analyzing the sand body connectivity, in view of the characteristics of great lateral change of sand bodies and enormous thin sands in vertical, we integrated dynamic production data, including formation pressure and water flooding conditions with phase transformed seismic data to perfect and adjust the previous sand connectivity results, which only based geologic and well logging data. At the same time, we use the connectivity ratio of injector and producer to analyze quantitatively the sand connectivity between injector and producer. This method has been used successfully in optimization of water injection and well pattern adjustment of PL oilfield. It can also be used as a reference for sand connectivity study in other similar fluvial facies oilfield.