致密储层二氧化碳吞吐工作参数优化设计

CO_2吞吐开发效果受多种因素影响,工作参数是重要因素之一。根据延长油田长8储层的孔喉特征、流体属性等研究所得参数,基于鄂尔多斯致密油藏长8储层的地质特征,研究致密储层CO_2吞吐开采工作参数优化问题。以延长油田SHH区块为研究区块,选取累积产油量作为评价指标,采用正交试验设计方法进行优化参数方案设计,应用组分数值模拟计算相应的开发效果。模拟计算结果表明,研究区块CO_2吞吐合理注气速度为20 000 m~3/d,注气时长为1个月,焖井时间为7 d,吞吐轮次为2轮。

Optimization Design of CO2 Huff and Puff Working Parameters in Tight Reservoir

The result of CO2 stimulation is affected by various factors, and the working parameters are one of the important factors. According to the pore throat characteristics and fluid properties of 8th number of Yanchang formation, basing on the development and geological characteristics of 8th number of Yanchang formation, CO2 huff and puff mining is proposed, the design parameters of CO2 throughput are optimized. SHH block of Yanchang oilfield is selected in this paper, The cumulative oil production is used as the evaluation index. The experimental scheme was designed by orthogonal test design method, and the Eclipse numerical simulation component model was used to calculate the cumulative oil production. The data analysis results show that the reasonable injection speed is 20000m3/d, the gas injection time is 1 month, the well time is 7 days, and the throughput is 2 rounds.