川西地区新场须二气藏开发对策探讨

Discussion about the development strategies of Xu2 gas reservoir of Xinchang in west Sichuan area

川西地区新场气田须二气藏2000年因新851井获得高产工业气流而发现,但通过多年的勘探开发评价,天然气产量仍处于徘徊阶段。通过对须二气藏地质特征和气藏动态特征等分析研究认为,须二气藏主要受裂缝控制,气水关系复杂,不同裂缝系统具有不同气水界面;气井一旦见水,产量和压力将快速下降。为此,提出开发此类气藏措施和办法,加强储层研究,勘探开发一体化,合理配产以及出水后排水采气等,提高气藏采收率和开发经济效益,为类似气藏开发提供借鉴。

Xu2 gas reservoir of Xinchang gasfield in west Sichuan was discovered in 2000 due to the acquisition of high-yield in dustrial gas flow in well Xin851.However,through many years of exploration and development evaluation,natural gas production was still in the wandering stage.Through analysis and research on the geological characteristics and dynamic features of Xu2 gas reservoir,this paper contended that Xu2 gas reservoir,mainly controlled by cracks,had complex gas/water correlation and different fracture system with different gas/water interface.With the emergence of water in gas wells,output and pressure droped rapidly.As a result,for the sake of the development of this types of gas reservoirs,many methods were proposed,including strengthening reser voir studies,the integration of exploration and development,rational production allocation,water drainage and gas production after water emergence.These methods have helped improve gas reservoir recovery ratio and economic benefits,providing reference for the development of similar types of gas reservoirs.