High Efficiency Exploitation Technology For Volcanic Gas Reservoir In Yingtai Gas Field

The3blocks of Yingtai gas field are complex geological conditions, developmentdifficulty, reserves scale not clcer. Adopt research gas enrichment area,with multidisciplinaryresearch application of seismic, geology, logging, reservoir engineering etc. Finally formed a set ofsuitable gas enrichment area preferred technology series for Yingtai field complex gasreservoir.Make sure layers of reserves accumulation zone, The efficient development of the mainlayer is dominated by horizontal wells.Through the study of reservoir characteristics, recognition gas field, to further implement thevolcanic rock gas reservoir plane, longitudinal reserves distribution, size and developmentpotential, to determine the block of natural gas reserves.The important factor is proposed inthis paper horizontal plane and vertical position is affecting development result of thehorizontal well, the volcanic rock gas reservoir lithology and lithofacies changes quickly,changes of material and thickness, non geological characteristics of strong heterogeneity,according to the well area, construction area of fine interpretation of the air water system, andthe distribution of crack and productivity prediction of the reservoir inversion results,comprehensive, determine the level of wells.Combined method of well test analysis andmodern reservoir engineering, through the analysis and evaluation of testing well pressure,production dynamic data, implement the distribution range of per well control reservoir,analying controllable gas reserve per well, revise and improve the per well reservoir dynamicconceptual model, and the long-term dynamic trend of gas field exploitation forecast thechange, to guide the preparation of gas field development scheme.Adopt the horizontal well and vertical well to develop,deploy34wells,using7drilledwells and27drilling horizontal wells. It can create an annual of350million cubic meternatural gas production, the average yearly take-off rate of GOIP will be1.67%,stable gasproduction will be8years. This will come true volcanic gas reservoir in Yitai gas field tohigh efficiency exploitation.