Study On Prediction Of Yanchang Natural Gas Pilot Test Area Gathering Engineering

According to the characteristics of natural gas and5x108m3/a natural gas resources development planning, limited data with achievements of geology, gas reservoir, gas and other upstream project has made and can be collected. According to the characteristics of the regional, temperament, development, through the gathering pipeline and station optimization of treatment process, feasibility study completed two pilot test area a supporting the construction of3108m3/a capacity of the surface engineering.In this paper, through the analysis of different station location, determine the station address and total process flow. Natural gas from wellhead into the gas gathering station, after separation and dehydration after treatment by gas gathering pipelines to LNG plant.This paper compares the advantages and disadvantages of three kinds of gas gathering process, three kinds of gas gathering network, two kinds of alcohol injection of alcohol injection process. Combined with the characteristics of the YanChang gas field, choose the high pressure gas gathering process, radiation branch shaped type gas gathering process. The site is not throttle, high pressure gas to the gathering station heating throttle, concentrated to the gas gathering process injecting alcohol.In this paper, through high pressure transportation, low transportation on single well production forecasting, statistics collection gas pipeline length. Through the Wimos gas formula, calculation of gas pipelines and gas gathering pipeline diameter.In this paper, by comparing the advantages and disadvantages of forced current method and sacrificial anode cathodic protection method of two kinds of mode, select the forced current method. The calculation formula of cathodic protection at length in this paper, determination of cathodic protection of unilateral protection length.