摘要：The investigation of fracture propagation in multi-layered formations can assist in determining the optimal hydraulic fracturing pumping schemes for unconventional tight gas reservoirs. The option of multilayer-commingled fracturing or separate-layer fracturing technologies, based on geological and engineering conditions, is crucial for the commercial development of oil and gas in multi-layered formations. This paper presents a field-scale interbedded sandstone-mudstone fracturing model that employs an unconventional fracture modeling method based on logging interpretation data of the Upper Shihezi Formation in the Ordos Basin. The study examines the effects of in-situ stress, interlayer spacing, injection rate, and fluid viscosity on the fracture propagation of layered formations. The research findings suggest that the in-situ stress difference among multiple layers and interlayer spacing are the primary factors affecting the stimulated reservoir volume (SRV). A larger interlayer spacing and in-situ stress difference can lead to a greater SRV in separate-layer fracturing. On the contrary, the multilayer-commingled fracturing technology is suggested. In this scenario, higher fluid viscosity and lower injection rate are recommended. Based on numerical results, a separate-layer fracturing/multilayer-commingled fracturing selection chart was established for layered formations. The key findings are expected to provide a basis for selecting separate-layer fracturing/multilayer-commingled fracturing in tight layered reservoirs. ? 2023 57th US Rock Mechanics/Geomechanics Symposium. All Rights Reserved.

ISSN号：9780979497582

卷、期、页：ARMA-2023-0410

发表日期：2023-06-25

期刊分区（SCI为中科院分区）：无

收录情况：EI（工程索引）

发表期刊名称：57th US Rock Mechanics/Geomechanics Symposium

通讯作者：井美洋,丛日超,陈健翔,温海涛

第一作者：杨睿月,黄中伟

论文类型：会议论文

论文概要：井美洋,杨睿月,黄中伟,丛日超,陈健翔,温海涛，Numerical Investigation on Field-Scale Fracture Propagation of Multi-layered Formations Based on Unconventional Fracture Model，57th US Rock Mechanics/Geomechanics Symposium，2023，ARMA-2023-0410

论文题目：Numerical Investigation on Field-Scale Fracture Propagation of Multi-layered Formations Based on Unconventional Fracture Model