火山岩气藏改建地下储气库注采能力  

INJECTION AND PRODUCTION CAPACITIES FOR THE VOLCANIC GAS RESERVOIR CONVERTED INTO UNDERGROUND GAS STORAGE

作　　者：舒萍[1] 高涛[1] 朱思南[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2015年第6期48-53,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油股份公司科技攻关项目"大庆探区非常规油气勘探开发关键技术研究与现场试验"(2012E260302)

摘　　要：火山岩气藏改建地下储气库,目前中国还没有先例。气井注采能力是改建储气库的一个关键参数,以徐深气田D区块为例,建立了适合火山岩气藏改建储气库注采能力的一套计算方法。在建立单井校正点二项式产能方程基础上,得到直井和水平井的平均产能方程;通过流入、流出节点法计算理想条件下不同油管尺寸、地层压力及井口压力下的最大注入和采出能力;通过控制冲蚀流量、临界水锥产量、临界携液产量等对气井最大采出能力进行约束,以确保储气库采气阶段边底水不会发生快速水侵,从而得到气井合理注入采出能力。综合多方法计算结果表明:D区块直井的采出能力上限为12×10~4m^3/d,注入能力上限为20×10~4m^3/d;水平井的采出能力上限为50×10~4m^3/d,注入能力上限为70×10~4m^3/d。At present, there is no precedent of converting a volcanic gas reservoir into underground gas storage in China. The injection and production capacities of the gas wells are the important parameter when building the un- derground gas storage. Taking Block D in Xushen Gasfield as an example, a set of computing methods of the capac- ities are established to suit the conversion. On the basis of the binominal productivity equation established for the in- dividual-well correction point, the average deliverability equation for the vertical and horizontal wells is acquired; by means of the inflow and outflow nodal analyzing method, the maximum injection and production capacities under the ideal conditions for different tubing sizes, formation and wellhead pressures; by controlling the erosion rate, critical water-coning gas rate, critical liquid-carrying gas rate and so on, the maximum production capacity is re- strained to avoid the quick invasion by the bottom water at the stage of the gas production of the storage and then to achieve the reasonable injection and production capacities for the gas wells. The calibrated results by combining many methods show that the upper limits of the injection and production capacities of the vertical wells in Block D are respectively 12×10^4 m^3/d and 20×10^4 m^3/d; on the contrary, for the horizontal wells, the corresponding ca- pacities are respectively 50×10^4m^3/d and 70×10^4 m^3/d.

关 键 词：徐深气田 火山岩气藏 储气库 注气能力 采气能力 

分 类 号：TE122.2[石油与天然气工程—油气勘探]