红河油田长8油藏脉冲周期注采矿场试验研究

Field test research of pulse-cyclic water injection and production in Chang 8 reservoir of Honghe oilfield

红河油田长8油藏由于天然裂缝发育以及井间压裂缝的存在,导致注采井间沟通关系复杂,注水开发过程中极易沿裂缝突进,裂缝性水窜严重。为探索适用于红河油田长8油藏裂缝性水淹后的注水方式及注水政策,开展了脉冲周期注采矿场试验。矿场试验表明,优化合理的脉冲式周期注水参数,可有效地使注入水进入基质孔隙,增加波及面积,改善裂缝性致密油藏的水驱效果。

Natural and artificial fractures develop in Chang 8 reservoir of Honghe oilfield,which results in complex relationship between the injection-production well and injected water dash along the fissures during the process of water injection development.In order to explore suitable water injection method and policy for Chang 8 reservoir of Honghe oilfield after water flooding, field test research of pulse-cyclic water injection and production was carried out. The result of field test shows that reasonable pulse cycle water injection parameters can effectively make the injected water flow into the matrix pores and enlarge swept area, which improves the water drive effect for fractured fissured dense oil reservoir.