The Availability Analysis Of K Shale Gas Play Gathering And Treating Schemes

The accumulation process of shale gas is significantly different from the conventional one,indicating that the exploitation of these two types of gas plays is also totally different.Therefore,the surface engineering scheme of the shale gas play should be suitable to its exploitation,focusing more on the modularization and standardization to satisfy the rolling development mode of the gas play and fluctuation of the gas wells production.Various gathering methods of the shale and tight gas play have been carefully investigated in this thesis.For example,in K shale gas play,the surface facilities with high-pressure gas production,medium-pressure gas collection and concentration dehydration have been emphasized.Also,based on the production and topographical situation of this play,the availability of the gathering and treating scheme has been discussed.By use of PIPEPHASE,the availability of flowlines is discussed.Besides,under high pressure conditions,the maximum flowline distances that will not produce hydrate are calculated.Then gas gathering network model is built to analyze the minimum temperature of the gas when gas pipelines leave gas-gathering stations.With HYSYS,availability of TEG dehydration and throttling dehydration processes for this field has been investigated,respectively.In addition,parameters in TEG dehydration process are optimized.Results show that the throttling dehydration process could be used to meet the required depth of dehydration for a station inlet pressure of over 9.6 MPa.Finally,three different gathering and treating schemes are proposed and,their pros and cons are analyzed,providing reference for the options of unconventional gas gathering and treating alternatives.