胜利探区新近系气藏特征及开发策略

CHARACTERISTICS AND DEVELOPMENT STRATEGY OF NEOGENE GAS POOL IN SHENGLI EXPLORATION AREA

对胜利探区新近系气藏进行综合分析,地质特征:气层在平面上呈条带状,剖面上呈透镜状,主要发育有岩性气藏、断块气藏和断块-岩性气藏。气藏储层埋藏浅、压实程度低,以高孔高渗为特征,气、水关系复杂,一个含气砂体就是一个气藏单元。开采特征:气井生产过程中产量压力递减快、出砂严重。开发策略:实现合理开采应采取整体部署、分批实施的开发对策,生产前进行先期防砂,根据不破坏储层结构、避免井底积液、合理利用地层能量等选择合理的工作制度,提高气藏资源利用率。

After comprehensive analysis of the Shengli exploration area Neogene gas pool,it shows that gas reservoir plane is into strips,profiles form a lenticular; main development includes lithologic gas reservoir,gas reservoir block and the block-lithologic gas reservoir. Gas reservoir is buried in shallow,compacted place with high porosity and high permeablity characterized by a complex relationship between air and water,and a gas-bearing sand body is a gas reservoir unit.During production process,production pressure declines quickly,sand comes out considerably. Production process should be taken to achieve a reasonable overall deployment and the implementation of development measures in batches;sand proof in advancedis conducted.According to reasonable regulations such as reservoir protection,avoiding from fluid at the bottom of the wells,and rational use of formation energy,utilization rate of gas pool resources can be improved.