河143块低渗透油藏注水压裂配套技术

Supporting technology of hydraulic fracturing in low permeability reservoir of block He143

对河143块开发数据进行统计分析,发现该块投产初期产能较好,但是由于油藏天然能量差、压力下降快,产量递减幅度比较大,反映了低渗透油藏仅依靠弹性能量开采,地层压力下降快的特点。在对整个区块实施优化注采系统、压裂改造后,有效地提高了河143整个区块的开发水平。通过实施注采优化,改善注水水质,提高注水质量,减缓平面及层间矛盾,降低综合递减率,使注采系统处于相对稳定状态,同时加强压裂工艺的针对性,提高区块储层的动用程度。

The development data of block He143 presents good productivity in early production period, but because of poor natural energy and rapid pressure loss, production decline is substantial, showing features of low permeability reservoirs recovered only by elastic energy. The development level of the whole block has been effectively improved by implementing injection-production optimization and fracturing stimulation, and the producing degree of the block has been improve by improving injected water quality, mitigating areal and interlayer problem, reducing total decline rate, stabilizing injection-production system, and enhancing fracturing response.