神木气田产水气井井下节流参数优化设计

Optimal design of downhole throttling parameters for water produced gas well in Shenmu gas field

 王京舰 2 王一妃³ 管磊磊⁴ 王德龙 2 黄琼 2 张海波 2

中国石油长庆油田分公司勘探开发研究院，陕西 西安 710018 低渗透油气田勘探开发国家工程实验室，陕西 西安 710018 中国石油华北油田分公司采油工程研究院，河北 任丘 062552 中国石油长庆油田分公司第十一采油厂，甘肃 庆阳 745000）

Research Institute of Exploration and Development, Changqing Oilfield Company, PetroChina, Xi′an 710018, China State Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi’an 710018, China Research Institute of Petroleum Production Engineering, Huabei Oilfield Company, PetroChina, Renqiu, 062552, China No.11 Oil Production Plant, Changqing Oilfield Company, PetroChina, Qingyang 745000, China)

 神木气田属于典型致密砂岩气藏，采用井下节流、井间串接生产模式。气井都不同程度地产水，影响了正常生产。针对普遍产水这一现象，突破以往单相气体井下节流模型，将液相质量分数引入能量守恒方程中，结合节流压降、温降模型，建立产水气井井下节流新模型。神木气田实例计算表明，采用新模型，节流工艺参数优化设计结果的配产符合率大幅提高，减少了气井因调产而重复更换节流器的作业成本，且能够提高气井携液能力，进一步延长气井稳产时间。

 The Shenmu gas field belongs to the typical tight sandstone gas reservoir, using the production mode of the downhole throttling and the serial connection between wells. Gas wells with different degrees of water production have important influence on the normal production of gas wells. Since most gas wells produce water in Shenmu gas field, liquid quality fraction is introduced into the energy conservation equation which is different from the traditional single-phase gas downhole throttling model. Combined throttling pressure drop and temperature drop model, downhole throttling model is established for water production gas wells. The calculation example of Shenmu gas field shows that the new model greatly improves the coincidence rate of throttling parameters design results, reduces the repeated replacement operation cost of the throttle for gas well production adjustment, improves the liquid carrying capacity, and prolongs the stable production period of gas wells.

10.6056/dkyqt201701023