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惠民凹陷临盘油区断块油田广泛发育,但对其封闭机制认识不清.从临盘复杂断块油田的实际地质资料出发,依据岩心、测井资料,结合物性、扫描电镜等实验分析,探讨了断裂胶结带的基本特征和形成机制.研究表明,临盘油区富含钙镁离子的地层水在断裂活动过程中沿断裂向上流动,随着压力的降低导致在断层附近砂岩中易形成方解石、白云石等矿物的沉淀,从而形成了致密的断裂胶结带,胶结带内孔渗性急剧变差,喉道半径和渗透率约降低一个数量级,成为封堵油气的有利屏障.
The fault block oilfield in Linpan Oilfield of Huimin Depression is widely developed, but its mechanism of confining is unclear.According to the actual geologic data of Linpan complex fault block oilfield, based on the core analysis, logging data, physical properties and SEM , The basic characteristics and formation mechanism of the fracture zone are discussed.The results show that the formation water containing magnesium and magnesium ions in the Linpan oil zone flows up the fault along the fault during the fault activity and decreases with the decrease of pressure, Formed calcite, dolomite and other minerals precipitation, resulting in a dense fracture of the bonding tape, the adhesive tape drastic deterioration of permeability, throat radius and permeability decreased by about an order of magnitude, as a favorable barrier to block oil and gas.