洼38块蒸汽复合烟道气驱试验研究

Experimental study on compound steam-flue gas drive in block Wa 38

通过物理模拟试验手段———利用特长基础管式模型 ,评价各种驱替方式的驱油效率 ,以探讨蒸汽吞吐后转蒸汽复合烟道气驱的适应性。确定合适的开采方式和优化的注入参数。研究结果 ,在本物理模型中最佳注蒸汽速度为 2 0mL/min ,最佳气 汽比为 1∶1,气 汽同注方式可提高驱油效率 10 33% ,明显提高了蒸汽驱驱油效率。综合考虑 ,可选择添加 0 1PV的泡沫剂 ,添加泡沫剂后比蒸汽驱驱油效率提高了 13 91%。蒸汽复合烟道气驱比单纯蒸汽驱具有明显优势 ,是稠油区块吞吐后期一种很有前景的接替开发方式。

Oil displacement efficiencies of different displacement modes have been evaluated through ultra long basic tubular model, a physical simulation method, to determine the applicability of compound steam flue gas drive after steam huff and puff Appropriate recovery mode and optimized injection parameters were also determined. The result shows that the optimal steam injection rate is 2.0ml/min, gas steam ratio is 1∶1 in this model. Co injection of gas and steam increases oil displacement efficiency by 10.33%. After all, foam compound (solution) of 0.1pv may be added which may increase steam drive efficiency by 13.91%. Compound steam flue gas drive has obvious advantages than steam drive, and is a prospective production method in late period of heavy oil steam huff and puff.