| 致密油藏压裂双水平井参数优化研究 |
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| 引用本文： | 胡景宏,陈琦,余国义,吕杨.致密油藏压裂双水平井参数优化研究[J].现代地质,2021,35(6):1880-1890. |
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| 作者姓名： | 胡景宏 陈琦 余国义 吕杨 |
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| 作者单位： | 1.中国地质大学(北京) 能源学院,北京 1000832.非常规天然气地质评价与开发工程北京市重点实验室,北京 1000833.中国石化西北油田分公司采油一厂,新疆 轮台 8416004.中国石油国际勘探开发有限公司,北京 1000345.中国石油长庆油田分公司第五采气厂,陕西 西安 710018 |
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| 基金项目： | 国家自然科学基金项目(52074248);国家自然科学基金项目(51804282);中央高校基金科研项目(2652018209) |
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| 摘 要： | 多段压裂水平井能有效地提高致密油藏单井产量,双水平井的使用则会增大增产效果,但其压后产量影响因素并不是很明确。基于渗流力学理论,分析压裂双水平井流体流动机理,建立了考虑启动压力影响的油藏—裂缝系统分段压裂双水平井数值模型,采用网格加密方法和控制变量法,计算分析了地质因素和工程因素对双水平井压后产量的影响,并使用正交试验方法把不同的裂缝参数和特征对水平井产量的影响进行了主次排序。结果表明:地质因素中的基质孔隙度和渗透率对压后单井产量影响最大;工程因素中的水平井筒长度和裂缝导流能力对水平井产量影响较大,并且相关因素的影响力排序为:水平井筒长度>裂缝导流能力>裂缝长度>水平井筒间距>裂缝条数。研究结果对致密油藏双水平井压裂理论及优化设计具有现实的实践指导意义。
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| 关 键 词： | 双水平井 分段压裂 启动压力梯度 数值模拟 敏感性分析 |
| 收稿时间： | 2021-03-10 |
| 修稿时间： | 2021-06-07 |
Hydraulic Parameter Optimization of Dual Horizontal Well in Tight Oil Reservoirs |
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| HU Jinghong,CHEN Qi,YU Guoyi,LÜ,Yang.Hydraulic Parameter Optimization of Dual Horizontal Well in Tight Oil Reservoirs[J].Geoscience——Journal of Graduate School,China University of Geosciences,2021,35(6):1880-1890. |
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| Authors: | HU Jinghong CHEN Qi YU Guoyi LÜ Yang |
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| Institution: | 1. School of Energy Resources, China University of Geosciences, Beijing 100083, China2. Beijing Key Laboratory of Unconventional Natural Gas Geology Evaluation and Development Engineering, Beijing 100083, China3. The First Oil Production Plant of Xibei Oilfield Company, Luntai,Xinjiang 841600, China4. China National Oil and Gas Exploration and Development Co. Ltd. (CNODC), Beijing 100034, China5. The Fifth Gas Production Plant of Changqing Oilfield Company, Xi'an, Shaanxi 710018,China |
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| Abstract: | Multi-stage fractured horizontal wells can effectively increase well production in tight oil reservoirs, and the use of dual horizontal wells could enhance the production efficiently. Based on the seepage mechanics theory, the fluid flow mechanisms for fractured dual horizontal wells were analyzed. Accordingly, a numerical model for segmented fractured dual horizontal wells in reservoir-fracture system (considering the initial pressure effect) was developed. Meanwhile, the grid encryption and the control variable methods were adopted. The influence of geological and engineering factors on the production of dual horizontal wells were calculated and analyzed. The results show that the geological factors of matrix porosity and permeability have dominating impact on single-well production after fracturing, while the engineering factors of horizontal well length and fracture conductivity have immense effect on well production. This study has practical and guiding significance for the theory and optimal design of dual horizontal well fracturing in tight oil reservoirs. |
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| Keywords: | dual horizontal well multi-stage fracturing initial pressure gradient numerical model sensitivity analysis |
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