基于地质-工程一体化的纠偏轨道优化设计及产能评价  

Optimization design of deviation-correction trajectory and production evaluation based on geology-engineering integration

作　　者：刘永升 豆子钧 张金成[2] 高德利[3] LIU Yongsheng;DOU Zijun;ZHANG Jincheng;GAO Deli(Polar Geology and Key Laboratory of Marine Minerals(China University of Geoscience(Beijing)),Ministry of Education,Beijing 100083,China;SINOPEC Research Institute of Petroleum Engineering,Beijing 100101,China;MOE Key Laboratory of Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]极地地质与海洋矿产教育部重点实验室,中国地质大学(北京),北京100083 [2]中国石化石油工程研究院,北京100101 [3]中国石油大学(北京)石油工程教育部重点实验室,北京102249

出　　处：《中国石油大学学报(自然科学版)》2025年第2期142-150,共9页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(42272362,U1762214);中央高校基本科研业务费专项(379202408);深地国家科技重大专项(2024ZD1000401)。

摘　　要：在页岩气开发过程中,如果水平井偏离计划轨道,将会加剧缝间干扰效应。为了减少产能损失,实钻井须高效、安全地返回到计划轨道上。基于此,建立考虑产能损失评价的纠偏轨道多目标优化设计模型。首先,建立压裂影响域与压裂深度的函数关系,并结合体积流量思想得到多裂缝产能的计算公式;然后,基于“双圆弧”纠偏轨道设计模型,得到轨道纠偏后的产能损失计算方法;最后,结合轨道势能评价,建立以地质-工程一体化为核心的纠偏轨道多目标优化模型。结果表明:优化压裂深度、降低裂缝长度可以减弱纠偏井的缝间干扰效应,降低产能损失;最小曲率值将导致产能损失最大、轨道势能最小的纠偏轨道;综合考虑地质和工程评价目标,可以保证较低的钻井风险并获得较高的页岩气产能;通过整体优化钻井和压裂参数,纠偏轨道的轨道势能降低23.9%。In the drilling process of shale gas reservoirs,if a horizontal well deviates from its planned trajectory,the inter-well interference effect can be intensified during later fracturing and production stage.In order to reduce the production loss,it is expected that the drilling deviation can be adjusted to the planned track efficiently and safely.In this study,a multi-objective optimization design model of deviation-correction trajectory was established considering production loss evaluation.Firstly,the relationship between fracturing influence region and fracturing depth was figured out,and a calculation formula of multi-fracture production was obtained in terms of a volumetric flow concept.Based on the proposed"double arc"trajectory design model,the calculation method of the production loss after trajectory correction was obtained.Finally,a multi-objective optimization model based on geology-engineering integration was established in consideration of the evaluation of potential energy.The results show that optimizing fracturing depth and reducing fracture length can weaken the inter-well interference effect and reduce production loss.The minimum curvature value can result in a trajectory with the greatest production loss and the least potential energy.The combination of the geological-engineering evaluation objectives can ensure lower drilling risk and higher shale gas production.The overall drilling and fracturing parameters can be optimized,in which the potential energy of the deviation-correction trajectory can be reduced by 23.9%.

关 键 词：页岩气 缝间干扰效应 产能损失 纠偏轨道 多目标优化 地质-工程一体化 

分 类 号：TE122.3[石油与天然气工程—油气勘探]