Dynamic Analysis Of Horizontal Wells In Fracturing Horizontal Wells In

The Su Dongnan region locating in the north of Jingbian gas field is a low permeability sandstone gas reservoir. With the character of low porosityand permeability, low abundance, large area, middle-low productivity, deep-buried, unconventional and strong concealment, this region is the important production superseding block of Jingbian gas field. Because of high pressure-declined rate, hard stable production, low degree of reserves producing, poor economic benefits, in order to enhance the reserves production and recovery percent of reserves, after3years of research, the Su Dongnan region was developed by fractured horizontal wells in2012. As a result, the dynamic analysis of fractured horizontal wells is the foundation of properly exploitation.Taking Jingbian Su Dongnan gas reservoir fractured horizontal wells as research object, this paper chooses gas wells which have better production condition to do performance analysis, which are on the basis of researching information and summarizing the geological features. To the fractured horizontal wells, the paper makes use of field data to do productivity evaluation, single well controlled reserves calculation, production decline rule analysis and reasonable operation rules research. The research of this paper has great significance in the exploitation of gas reservoir fractured horizontal wells.Based on the research, this paper achieves the following achievements:(1) This paper makes use of productivity formula of fractured horizontal well and a single point deliverability formula to Productivity evaluation. It also analyses the impacting factors of productivity.(2) By using the flowing material balance method, wellhead pressure decline method and modern production decline analysis, this paper conducts the calculation control reserve of single well to fractured horizontal well. by the comparison of method, it proves that the result is reliable.(3) According to the traditional Arp’s decline curve, this paper analyses the fractured horizontal wells which have decline trend and determines decrease progressively, initial decline rate, recoverable reserve, remaining reserve and abandonment time of fractured horizontal wells.(4) In order to ascertain the reasonable operating practice, this paper utilizes empirical method, gas productivity index method and critical with fluid flow method for the proration of fractured horizontal wells.In conclusion, this article research provides powerful guarantee for the reasonable and efficient development of gas field through these dynamic analysis of fractured horizontal wells.