国内深水气田首次降压开采应用实践

Application Practice of the First Depressurization Exploitation in Deep Water Gas Field in China

在深水气田开发过程中,随着天然气的采出,气藏能量逐渐衰减,导致气田产量逐渐下降,难以满足下游需求。为了提高气田采收率,南海某深水气田新增湿气压缩机流程,并同时采用降低深水气田登陆平台整体压力的方式,有效提高了气田采收率。该深水气田降压开采是国内深水气田首次实施降压生产,在实施中操作人员创新性地开发了在线切换流程降压模式,并应用了先进的工业模拟软件OLGA,避免了停产降压对下游用户影响,避免了深水海管泄压放空的能源浪费,避免了对新增设备的损害,避免了平台意外关停。最终,该深水气田的降压生产取得了较好的效果,对国内其他深海气田开发有较高借鉴意义。

During the development of deep water gas field,the energy of gas reservoir decreases gradually with the extraction of natural gas,which leads to the decrease of gas field production,it is difficult to meet downstream demand.In order to improve gas field recovery,a new wet gas compressor process was added to a deep water gas field in the South China Sea.At the same time,the overall pressure of the landing platform of the deepwater gas field was reduced to effectively improve gas field recovery.It is the first time for domestic deep water gas field to implement gas depressurization exploitation.During the implementation,the operators innovatively develop an online switching process depressurization mode and apply advanced industrial simulation software OLGA.These measures avoid the impact of production shutdown and depressurization on downstream users,avoid the energy waste of deep water pipe pressure relief,avoid the damage to the new equipment,and avoids the accidental shutdown of the platform.In the end,the gas depressurization exploitation of the deep water gas field has achieved good results.It is of high reference significance to the development of other deep water gas fields in China.