摘要：Two-phase flow is generally significant in the hydraulic-fracturing design of a shale-gas reservoir, especially during the flowback period. Investigating the gas-and water-production data is important to evaluate stimulation effectiveness. We develop a semianalytical model for multifractured horizontal wells by incorporating the two-phase flow in both shale matrix and fracture domains. The complex-fracture network, including both primary/hydraulic fractures and secondary/natural fractures, is modeled explicitly as discretized segments. The node-analysis approach is used to discretize the networks into a number of fracture segments and connected nodes, depending on the complexity of the fracture system. The two-phase flow is incorporated by iteratively correcting the relative permeability to gas/water for each fracture segment and capillary pressure at each node with the fracture depletion. The accuracy of the proposed model is confirmed by the numerical model. Subsequently, the early-time gas- and water-production performance is analyzed by use of various fracture geometries and network configurations. The model was also used to history match an actual multistage hydraulically fractured horizontal well in the Marcellus Shale during the flowback period. The research findings have shed light on the factors that substantially influence the gas-and water-production behavior during the flowback period. We also investigate the effects of fracture-network geometries and complexities on the gas/water-ratio (GWR) diagnostic plots. The results depict that the GWR behavior on the diagnostic plots is highly dependent on fracture-network geometry, configuration, and connectivity, which could assist in deriving the critical fracture properties affecting the production performance. This work extends the semianalytical approach previously proposed for modeling single-phase to two-phase flowback problems in unconventional reservoirs with various fracture-network geometries. The meth

关键字：SPONTANEOUS IMBIBITION HORIZONTAL WELLS PRODUCTION SIMULATION RESERVOIR SIMULATION NUMERICAL-SIMULATION INTERFACIAL-TENSION WATER-LOSS OIL MEDIA PERFORMANCE

ISSN号：1086-055X

卷、期、页：卷: 22 期: 6 页: 1808-1833

发表日期：2017-12-01

影响因子：2.208000

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,ESI（基本科学指标数据库）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：SPE JOURNAL

参与作者：Yu, Wei,Sepehrnoori, Kamy,Lashgari, Hamid R.

第一作者：杨睿月,黄中伟,李根生,田守嶒,宋先知,盛茂

论文类型：期刊论文

论文概要：杨睿月,黄中伟,李根生,Yu, Wei,Sepehrnoori, Kamy,Lashgari, Hamid R.,田守嶒,宋先知,盛茂，A Semianalytical Approach To Model Two-Phase Flowback of Shale-Gas Wells With Complex-Fracture-Network Geometries，SPE JOURNAL，2017，卷: 22 期: 6 页: 1808-1833

论文题目：A Semianalytical Approach To Model Two-Phase Flowback of Shale-Gas Wells With Complex-Fracture-Network Geometries