胡尖山油田安83区长7油藏层理见水机理研究

对工区储层特征及开发动态研究分析认为储层层间非均质性强、垂向渗透性差异大导致局部注水强度过大,高强度注水形成水力渗透破坏,沿层理面等薄弱面突进是该区见水的主要原因之一.由于储层层理发育,层理面或炭质、泥质条带与砂岩胶结面（薄弱面）是渗流的优势通道,当地层承压大于致密砂岩薄弱面破裂压力时,流体的压裂作用沿薄弱面发生,形成“层理裂缝系统”导致油井见水,且具有多方向性和连片性,较为合理的解释了目前工区多方向性及呈片分布的见水特征.

Researching on mechanism of water breakthrough in bedding surface of An 83 Chang 7 reservoir of Hujianshan oilfield

Research on work area reservoir characteristics and development dynamic analysis that store between layers of strong heterogeneity, vertical permeability differences lead to lo-cal extremely high injection intensity.High strength of water injection forms hydraulic per-meability damage, dash along weak surfaces,such as the bedding face,is one of the main causes of water breakthrough in the area.Due to the bedding layers of the reservoir, cementa-tion surface（weak）between bedding plane or carbonaceous,argillaceous stripe and sandstone is the regnant seepage channels.When local weak surface layer pressure is greater than the dense sandstone fracture pressure,fluid fracturing effect occurres along the weak surface, forming a ＂system＂ of bedding cracks which causes directional and contiguous water break-through. The more reasonable explanation of the current area is the directional and contigu-ous characteristics of water breakthrough.