Numerical investigation on the effect of depletion-induced stress reorientation on infill well hydraulic fracture propagation  

作　　者：Feng-Shou Zhang Liu-Ke Huang Lin Yang Egor Dontsov Ding-Wei Weng Hong-Bo Liang Zi-Rui Yin Ji-Zhou Tang 

机构地区：[1]Key Laboratory of Geotechnical&Underground Engineering of Ministry of Education,Tongji University,Shanghai,200092,China [2]Department of Geotechnical Engineering,College of Civil Engineering,Tongji University,Shanghai,200092,China [3]State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,430071,China [4]ResFrac Corporation,Palo Alto,CA,94301,USA [5]PetroChina Research Institute of Petroleum Exploration and Development,Langfang,065007,China [6]State Key Laboratory of Marine Geology,Tongji University,Shanghai,200092,China [7]School of Ocean and Earth Science,Tongji University,Shanghai,200092,China

出　　处：《Petroleum Science》2022年第1期296-308,共13页石油科学（英文版）

基　　金：the support provided by the Scientific Research and Technology Development Project of CNPC(Grant No.kt2017-19-01-1);the National Natural Science Foundation of China(Grant No.41772286,No.42077247 and No.42002271);Petro China Innovation Foundation(Grant No.2018D-5007-0202);Project funded by China Postdoctoral Science Foundation(Grant No.2021T140514);Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences(Grant No.Z020009)。

摘　　要：Depletion-induced stress change causes the redistribution of stress field in reservoirs,which can lead to the reorientation of principal stresses.Stress reorientation has a direct impact on fracture propagation of infill wells.To understand the effect of stress reorientation on the propagation of infill well’s fractures,an integrated simulation workflow that combines the reservoir flow calculation and the infill well hydraulic fracturing modeling is adopted.The reservoir simulation is computed to examine the relationship between the extent of stress reversal region and reservoir properties.Then,the hydraulic fracturing model considering the altered stress field for production is built to characterize the stress evolution of secondary fracturing.Numerical simulations show that stress reorientation may occur due to the decreasing of the horizontal stresses in an elliptical region around the parent well.Also,the initial stress difference is the driving factor for stress reorientation.However,the bottom hole pressure,permeability and other properties connected with fluid flow control timing of the stress reorientation.The decrease of the horizontal stresses around the parent well lead to asymmetrical propagation of a hydraulic fracture of the infill well.The study provides insights on understanding the influence of stress reorientation to the infill well fracturing treatment and interference between parent and infill wells.

关 键 词：Infill well Depletion Hydraulic fracture Stress reorientation Asymmetry fracture 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]