Integrated Completion Technology of Water and Sand Control in Reservoirs with Extra-High Porosity and Permeability in Bohai Oilfield

The reservoir of Bohai BN Oilfield, dominated by unconsolidated sandstone with ultra-high porosity and permeability, exhibits strong heterogeneity and has serious water and sand production from producing wells. The existing water and sand control measures designed and implemented independently have problems such as cumbersome design and implementation, and poor effect of water and sand control. Therefore, based on the completion technology of continuous packer water control and the idea of geological engineering integration, the methods of optimizing the particle size of the continuous packer, designing the flow control strength of inflow control devices (ICDs), and optimizing the configuration of ICDs were proposed, and the integrated completion technology of water and sand control suitable for the Bohai reservoir with ultra-high porosity and permeability was developed. The integrated completion technology of water and sand control was tested in three wells in BN Oilfield. Compared with the adjacent well, the water-free oil production period of a single well was extended by 187 days on average, the initial water cut was much lower than expected. The wellhead sand-free time was significantly increased, among which the wellhead sand-free time of Well BN-D4H1 was 889 days. Field test results demonstrate that the integrated completion technology of sand and water control can meet the need for water and sand control in BN Oilfield.