摘要：Hydraulic fracturing technology is vital for the efficient extraction of oil and gas from low-permeability tight sandstone reservoirs.Taking the central Bohai oilfield in China as an example, these fields are typically composed of thinly interbedded tight sandstone, characterized by low permeability and significant lithological heterogeneity between layers. Fractures may either be confined, limiting vertical growth and reducing production, or overextend into water-bearing zones, causing contamination and compromising reservoir integrity. Therefore, predicting vertical fracture propagation during field fracturing operations is critical for efficient resource extraction.However, there is still a lack of comprehensive understanding of the mechanisms governing vertical fracture growth offshore.This paper applies numerical simulations based on the finite element method to elucidate the interlayer fracture propagation behavior in low-permeability tight sandstone reservoirs. A fracture propagation model for thin interlayered tight sandstone formations is constructed, and the effects of various factors on hydraulic fracture propagation are systematically analyzed, including geological factors such as interlayer stress contrast, thickness, and differences in elastic modulus, as well as operational parameters including fracturing fluid viscosity and injection rate. This study clarifies the cross-layer propagation patterns of hydraulic fractures under the influence of multiple factors and yields a comprehensive prediction chart for fracture propagation thickness under the combination of complex factors. The results of this research can provide theoretical support for the design of reservoir stimulation operations in low-permeability tight sandstone oilfields.

关键字：Bohai oilfield; hydraulic fracturing; thin interbedded tight sandstone; vertical propagation pattern

ISSN号：2227-9717

卷、期、页：卷12期11

发表日期：2024-11-01

期刊分区（SCI为中科院分区）：四区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：PROCESSES

参与作者：张安顺,武广瑷,陈峥嵘

通讯作者：赵梁梁,王景鹤

第一作者：刘伟

论文类型：期刊论文

论文概要：赵梁梁,张安顺,武广瑷,陈峥嵘,刘伟,王景鹤，Study on the Vertical Propagation Behavior of Hydraulic Fractures in Thin Interbedded Tight Sandstone，PROCESSES，2024，卷12期11

论文题目：Study on the Vertical Propagation Behavior of Hydraulic Fractures in Thin Interbedded Tight Sandstone