Therefore,the producer-injector spacing corresponding to the minimum displacement pressure gradient overcoming the starting pressure gradient of low permeability reservoir is just the maximum spacing for establishing effective displacement between injector and producer.

Investigations have been made of reasonable well spacing density, producer-injector spacing and water-injecting mode, which.

To ultra-low permeability reservoir,the key point of development effectiveness is producer-injector spacing,at the present,it is determined by means of permeability and threshold pressure gradient(TPG).

Calculating the limit injector-producer distance in low permeability pool by with start-up pressure gradient

Based on the example in Min114 block at Xinmin oil field,the authors analyze the relation of the fracture and crustal stress,measure the direction and length of the hydraulic fracture by receiving the microseism signals when the terrene is broken,which provides a basis for deploying reasonable flood pattern for development of low permeability reservoir.

The report computes the producing gas equation of the gas well and pressure nodes,determines dynamic relationship curve between the inflow and outflow of the injection and production well.