濮城油田沙一段油藏濮1-1井组二氧化碳驱研究及先导试验效果分析

Study of carbon dioxide drive in Pu 1-1well and pilot experiment result analysis of Sha 1 reservoir in Pucheng Oilfield

李锋 杨永超

Li Feng Yang Yongchao

中国石化集团中原石油勘探局设计研究院, 河南濮阳 457001; 中国石油化工股份有限公司中原油田分公司采油二厂, 河南范县 457532

Institute of SINOPEC Zhongyuan Oilfield Company, Puyang 457001; No.2 Production Plant of SINOPEC Zhongyuan Oilfield Company, Fanxian 457532

根据沙一油藏的物性特点,开展了CO2驱研究,室内进行了地层原油相态、压力组分、注CO2压力等实验。为了确定合理的开采方式,进行了连续注CO2、水气交替注入等实验研究。室内实验表明,在沙一油藏进行CO2驱是可行的。在室内模拟和CO2驱替实验的基础上,在现场开展了矿场试验。通过在濮1-1井进行试验,井组取得了好的效果,日增油8.5 t,累积增油1 150t。这为下步濮城油田高含水油藏进一步提高采收率提供了新的途径。

Based on physical properties of Sha 1 reservoir, study on carbon dioxide drive, oil phase, pressure composition, and carbon dioxide injection pressure was done. In order to determine reasonable production method, experiments were done to select an optimal method such as continuous injection of carbon dioxide, alternative injection of gases and water, and so on. Lab experiments showed that carbon dioxide drive was feasible in Sha 1 reservior. Field test was done based on lab simulation and carbon dioxide drive experiment, increase was 1 150 and results Showed oil production increased by 8.5 t per day, and accumulative oil t, which provided new approach to enhance recovery ratio for high water cut reservoirs in Pucheng Oilfield.

2008年中国石化集团提高采收率项目的子项目(编号2008-ZY00012)

https://doi.org/10.3969/j.issn.1008-2336.2009.04.056