大庆外围东部葡萄花油层注采参数优化方法

Optimization method of production-injection parameter of eastern Putaohua reservoir in peripheral Daqing Oilfield

赵德利 宫宝 张庆斌 王宗文

中国石油大庆油田有限责任公司第八采油厂，黑龙江 大庆 163514

No.8 Oil Production Plant, Daqing Oilfield Co. Ltd., PetroChina, Daqing 163514, China

为解决大庆外围油田中高渗葡萄花油层高含水开发阶段保液困难较大的问题，优选储层条件较好的A区块，通过取心资料分析、室内实验论证、开发区块对比、公式推导与现场试验相结合的方法，开展注采参数优化研究，明确了含水在70%以后仍有近一半的剩余可采储量，适合提高采液速度。研究结果表明，中高渗葡萄花油层高含水期注入孔隙体积倍数应达到0.4～0.5 PV以上，注入速度要保持在0.04 PV/a，采液速度应达到3.8%以上。典型区块试验后，注采结构得到改善，油井产液量和产油量上升，油井生产时间延长，提高了油田的最终采收率。

In order to solve the problem of difficult liquid maintaining in middle and high permeability Putaohua reservoir at the high water-cut development stage in peripheral Daqing Oilfield, Block A with good reservoir condition is selected. Through coring data analyzing, indoor experiment demonstrating, development block contrasting, formula deducing and the method combined with field test, this paper studies the optimization method of production-injection parameter and defines that there are still half remaining recoverable reserves to be produced after the water-cut achieves 70%. At high water-cut stage, enhancing the liquid production rate is applicable. Study shows that the pore volume injected should achieve above 0.4-0.5 PV, the water injection rate should maintain at 0.04 PV per annum and the liquid production rate should achieve above 3.8% in the middle and high permeability Putaohua reservoir at the high water-cut stage. After the test is conducted on typical blocks, the production-injection system is improved. The liquid production and oil production of oil wells increase and the production time prolongs, which improves the ultimate recovery of oilfield.

10.6056/dkyqt201206015