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方法利用数值模拟方法，在小洼油田洼38块目前井网井距加密调整的基础上，对沙河街组沙三层系进行70m小井距开发试验。目的寻找提高采收率，实现稳产的最终开发方式。结果优选出洼38块蒸汽吞吐到地层压力为5．0MPa左右时，转入蒸汽驱方式开发，可提高经济效益。结论全面实施70m小井距开发试验，有利于实现开发方式的顺利转换，同时利用铁板效应，可提高蒸汽的热利用率。
Methods The numerical simulation method was used to develop the 70m small well spacing of Shahejie Formation sand system based on the adjustment of well spacing of well 38 in Xiaowa oilfield. Aim To find out the ultimate development method to increase oil recovery and achieve stable production. As a result, it is suggested that when the steam pressure of 38 blocks in the depression reaches about 5.0 MPa, it will be transferred to the steam flooding mode to improve the economic benefits. Conclusion The full implementation of the 70m small well development test is conducive to the smooth transition of the development mode. At the same time, the utilization of the iron plate can increase the heat utilization rate of the steam.