热采井多轮次蒸汽吞吐出砂预测研究
Study on sand production prediction of thermal recovery wells with multiple cycles of steam huff and puff
浏览(4443) 下载(15)
- 引用格式:
-
晏敏,袁征,李开兴,肖遥,田得粮,马成云,张顺,莘怡成.热采井多轮次蒸汽吞吐出砂预测研究[J].天然气与石油,2025,43(3):62-72.doi:10-3969/j.issn.1006-5539.2025.03.009
YAN Min, YUAN Zheng, LI Kaixing, XIAO Yao, TIAN Deliang, MA Chengyun, ZHANG Shun, XIN Yicheng.Study on sand production prediction of thermal recovery wells with multiple cycles of steam huff and puff[J].Natural Gas and Oil,2025,43(3):62-72.doi:10-3969/j.issn.1006-5539.2025.03.009
- DOI:
- 10-3969/j.issn.1006-5539.2025.03.009
- 作者:
- 晏敏1,2 袁征1,2 李开兴1,2 肖遥3 田得粮4 马成云5 张顺1,2 莘怡成1,2
YAN Min1,2, YUAN Zheng1,2, LI Kaixing1,2, XIAO Yao3, TIAN Deliang4, MA Chengyun5, ZHANG Shun1,2, XIN Yicheng1,2
- 作者单位:
- 1. 中海油田服务股份有限公司, 天津 300459; 2. 海洋油气高效开发全国重点实验室, 北京 102209; 3. 中海石油(中国)有限公司天津分公司, 天津 300459; 4. 中国石油长庆油田分公司油气工艺研究院, 陕西 西安 710018; 5. 西安石油大学机械工程学院, 陕西 西安 710018
1. China Oilfield Services Limited, Tianjin, 300459, China; 2. National Key Laboratory of Offshore Oil and Gas Exploitation, Beijing, 102209, China; 3. CNOOC China Ltd., Tianjin Branch, Tianjin, 300459, China; 4. Oil & Gas Technology Research Institute of PetroChina Changqing Oilfield Company, Xi'an, Shaanxi, 710018, China; 5. Mechanical Engineering College, Xi'an Shiyou University, Xi'an, Shaanxi, 710018, China
- 关键词:
- 出砂预测;蒸汽吞吐;稠油热采;损伤演变;循环注采
Sand production prediction; Steam huff and puff; Heavy oil thermal recovery; Damage evolution; Cyclic injection-production
- 摘要:
蒸汽吞吐是开发稠油资源的有效手段之一。高温蒸汽的注入及循环注采会引起储层力学性质的变化,造成热采井出砂规律的变化。综合考虑热应力效应、注热引起的强度弱化以及循环注采导致的岩石损伤演变,建立了热采井多轮次蒸汽吞吐出砂预测模型,以海上某热采井为例,分析了不同因素对热采井出砂临界压差的影响以及多因素综合作用下热采井的出砂规律。结果表明,注热引起的强度损伤对出砂临界压差的影响最显著,并导致出砂临界压差显著降低,平均降幅10.0 MPa;热应力效应引起出砂临界压差的降低相对较小,降幅约1.0 MPa;循环注采损伤主要对强度5.5 MPa以下岩石有影响,大多在5轮次内失效,而对强度5.5 MPa以上岩石影响相对较小,且循环注采的影响随着轮次的增加而逐渐减小。在热应力效应、注热引起的强度弱化和循环注采导致的岩石损伤演变的综合影响下,热采井在首轮注热生产后，出砂临界压差就显著降低,出砂风险较高。研究结果进一步揭示了蒸汽吞吐热采井的出砂规律,对现场的出砂预测和防砂对策制定具有一定指导意义。
Steam huff and puff is one of the effective means to develop heavy oil resources. The injection of high-temperature steam and cyclic injection-production will cause changes in mechanical properties of reservoir and then alter the sand production pattern of thermal recovery wells. Considering the thermal stress effect, the strength weakening caused by heat injection and the rock damage evolution caused by cyclic injection-production, a sand prediction model for thermal wells undergoing multiple cycles of steam huff and puff was developed. Taking an offshore thermal recovery well as a case study, the influence of various factors on the critical drawdown pressure (CDP) for sand production and the sand production pattern under combined factors were analyzed. The results show that the strength damage caused by heat injection has the most significant impact on reducing the CDP, with an average decrease of 10.0 MPa; the reduction in CDP due to thermal stress effects is relatively minor, about 1.0 MPa; Cyclic injection-production damage mainly affects the rocks with strength below 5.5 MPa, leading to their failure within approximately 5 injection cycles, while it has little effect on rocks with strength above 5.5 MPa, and the influence of cyclic injection-production gradually decreases with increasing steam huff and puff cycles. Under the combined influence of thermal stress effects, strength weakening induced by heat injection, and rock damage evolution caused by cyclic injection and production, the CDP of thermal wells decreases significantly after the first steam injection, increasing the risk of sand production. The results of the current work further reveal the sand production pattern of steam huff and puff thermal wells and provide guidance for sand production prediction and sand control strategies in the field.
