Application of comprehensive development technology in Dongfang gas field

Reservoir in Dongfang gas field is of strong heterogeneity,which is especially obvious after the first production well drilling.On 2D seismic data trace integration sections or conventional retrieval seismic section,it shows stability and good continuity of reservoir distribution,and no faults between wells,however the difference of gas components is big.According to these problems,fine description of reservoir is done before implementation of second development of Dongfang gas field.On the one hand,high resolution 3d seismic data is collected,and sand body and interlayer distribution are characterized finely by special treatment and inversion technique.On the other hand,exhibition of the sand body,causes of septal interlayer and heterogeneity in reservoir are researched from reservoir sedimentology.Based on the above basis,fine well location optimization and adjustment are done for development well,and especially for low-resistivity gas reservoir large displacement horizontal well development is used.Many techniques such as random drilling technique with horizontal well,optimization of production allocation technique,geological modeling,analogue-digital integration and so on are used in implementation,which make the productivity and components of gas field development well meet or exceed the design requirements and provide solid foundation for gas field yield reaching ODP design level and keeping long and stable downstream gas supplying.