Zhang Linpu
Petroleum Development Center, Shengli Oilfield, Dongying 257001, China.
ACS Omega. 2024 Sep 11;9(38):39523-39532. doi: 10.1021/acsomega.4c03504. eCollection 2024 Sep 24.
In response to challenges such as the rapid rise of water content, the rapid decline of periodic production, and the serious intrusion of edge and bottom water in heavy oil reservoirs after multicycle profile control, the flue gas-assisted steam huff and puff technology is proposed. By focusing on Block Cao128 in the L Oilfield as a research subject, the feasibility of applying the flue gas-assisted steam huff and puff technology in heavy oil reservoirs has been verified through the establishment of a three-dimensional geological model. Additionally, the injection and production parameters in steam huff and puff have been optimized. The research results indicate that when the cyclic steam injection volume is 1000 t, the maximum net oil increment can be achieved, reaching 6308 × 10 t. Furthermore, when the cyclic flue gas injection volume is 9 × 10 Nm, the efficacy of the flue gas-assisted steam huff and puff is enhanced. The optimal injection method is to inject flue gas in the early stage of steam huff and puff, and the oil-gas ratio is increased to 1.77. The introduction of flue gas can enhance production significantly and exert a significant impact on early-stage production. The earlier the injection time of flue gas, the better the development effect. Flue gas-assisted steam huff and puff technology improves energy utilization efficiency and reduces pollutant emission. It has a significant positive impact on environmental protection and sustainable development.
针对稠油藏多轮次调剖后含水率快速上升、周期产量快速下降、边底水严重侵入等问题，提出了烟道气辅助蒸汽吞吐技术。以L油田草128区块为研究对象，通过建立三维地质模型，验证了烟道气辅助蒸汽吞吐技术在稠油藏应用的可行性。此外，对蒸汽吞吐的注采参数进行了优化。研究结果表明，当周期注汽量为1000t时，可实现最大净增油量，达到6308×10t。此外，当周期注烟道气量为9×10 Nm时，烟道气辅助蒸汽吞吐的效果增强。最佳注入方式是在蒸汽吞吐前期注入烟道气，油气比提高到1.77。烟道气的引入可显著提高产量，并对前期生产产生重大影响。烟道气注入时间越早，开发效果越好。烟道气辅助蒸汽吞吐技术提高了能源利用效率，减少了污染物排放。对环境保护和可持续发展具有显著的积极影响。
