页岩气藏水平压裂井产能模型研究现状
Research status of productivity model for fractured horizontal wells in shale gas reservoirs
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- 引用格式:
-
许莹莹,刘先贵,胡志明,端祥刚,常进.页岩气藏水平压裂井产能模型研究现状[J].天然气与石油,2022,40(2):57-66.doi:10.3969/j.issn.1006-5539.2022.01.010
XU Yingying, LIU Xiangui, HU Zhiming, DUAN Xianggang, CHANG Jin.Research status of productivity model for fractured horizontal wells in shale gas reservoirs[J].Natural Gas and Oil,2022,40(2):57-66.doi:10.3969/j.issn.1006-5539.2022.01.010
- DOI:
- 10.3969/j.issn.1006-5539.2022.01.010
- 作者:
- 许莹莹1,2 刘先贵1,2 胡志明1,2 端祥刚1 常进1
XU Yingying1,2, LIU Xiangui1,2, HU Zhiming1,2, DUAN Xianggang1, CHANG Jin1
- 作者单位:
- 1. 中国石油勘探开发研究院, 北京 100083; 2. 中国科学院渗流流体力学研究所, 北京 100493
1. PetroChina Research Institute of Petroleum Exploration and Development, Beijing, 100083, China 2. Institute of Seepage Fluid Dynamics, University of Chinese Academy of Sciences, Beijing, 100493, China
- 关键词:
- 页岩气;体积压裂;产能模型;立体开发;产能影响因素
Shale gas; Volumetric fracturing; Productivity model; Multi-layered mining; Productivity influencing factors
- 摘要:
- 页岩储层产量预测是页岩气开发的热点问题之一。基于页岩气渗流机理和裂缝表征建立的产能模型是预测产能的有效途径。系统总结了页岩气井产能理论模型,比较分析了各种产能模型的特点以及适用范围，进一步调研了立体开发的研究进展,并系统归纳了体积压裂水平井产能主要影响因素,最后提出了页岩气藏水平压裂井产能模型研究现状的认识和展望。通过上述调研结果得出以下认识:1)根据气体供给区域范围,页岩气产能模型大体分为SRV区域产能模型和USRV+SRV区域复合产能模型,考虑到产能模型中裂缝形态的差异性,SRV区域产能模型可划分为连续介质模型和离散缝网产能模型,连续介质模型依据储层介质传导能力的不同可进一步细分为双重介质模型、多重介质模型以及等效介质模型;2)页岩气立体开发的认识沿用直井多层合采理论研究成果,需要开展相关的物理模拟和理论研究,建立立体开发的产能评价模型,指导页岩储层多层高效立体开发;3)页岩气产能影响因素主要包括流动效应参数、储层参数和压裂参数。生产前期产量大小主要受控于裂缝参数,后期受控于基质物性参数和流动效应参数。调研结果对指导页岩气井产能预测以及生产动态分析具有理论参考意义。
Shale gas production prediction is one of the hot issues in shale gas formations development. A productivity model based on shale gas seepage mechanism and fracture distribution characterization is an effective way to predict productivity. In this paper, the productivity theoretical models of shale gas wells were systematically summarized and compared, the research progress of three-dimensional development was further investigated, and the main productivity influencing factors were systematically analyzed. Finally, the prospect of the productivity models for the fractured horizontal wells in shale gas reservoirs were put forward. The following understandings were obtained through the above study: a. According to the gas supply regions, the shale gas productivity models are roughly divided into the SRV regional productivity model and the USRV+SRV region compound productivity model. Taking into account the differences in the treatment of fracture morphology in the productivity model, the SRV productivity model can be divided into continuous medium model and discrete fracture network productivity model. The continuous medium model can be further subdivided into dual medium model, multi-medium model and equivalent medium model according to the different conductivity of the reservoir medium; b. The understanding of the multi-layered development of shale gas reservoirs follows the theoretical research results of vertical well multi-layer combined production. It is necessary to carry out related physical simulation and theoretical research to establish a three-dimensional development productivity evaluation model and guide the efficient three-dimensional development of shale gas multi-layer reservoirs; c. The main productivity influencing factors include flow parameters, reservoir parameters and fracturing parameters. The production of the early stage is mainly controlled by the fracturing parameters, and the production of the later stage is controlled by the matrix parameters and flow parameters. The results of this study provide theoretical reference for shale gas well productivity prediction and production dynamics analysis.
