中南大学学报（自然科学版）Issue(5)：1732-1738,7.DOI:10.11817/j.issn.1672-7207.2015.05.022
致密油藏非达西渗流流态响应与极限井距研究
Non-Darcy flow pattern response and critical well spacing in tight oil reservoirs
摘要
Abstract
Based on the experiment results of actual cores and the typical non-linear flow mathematical model, the non-Darcy flow pattern response and critical well spacing in tight oil reservoirs were investigated. Based on a case, the critical well spacing in different permeability reservoirs was calculated, which reveals the pressure and gradient pressure distributing regularity between injection well and production well. The results indicate that during the single-phase flow in tight oil reservoir, there are three flow pattern response regions: a non-flow area, a non-linear flow area and a quasi-linear flow area. For fractured well, the track of production well about the injection well (i.e., a line and a quarter of a circle) is similar. As further away from the injection well, three pressure or gradient pressure distribution lines can show three flow patterns: radical flow near the injection well, pseudo radical flow around the fracture and linear flow in the fracture. The tighter reservoir is, the greater minimum start-up pressure gradient will be, and the more pressure loss between injection well and the tip point of fracture.关键词
致密油藏/非达西渗流/流态/极限井距Key words
tight oil reservoirs/non-Darcy flows/flow pattern/critical well spacing分类
能源科技引用本文复制引用
任龙,苏玉亮,赵广渊..致密油藏非达西渗流流态响应与极限井距研究[J].中南大学学报（自然科学版）,2015,(5):1732-1738,7.基金项目
国家科技重大专项(2011ZX05051)；长江学者和创新团队发展计划项目(IRT1294)@@@@(Project(2011ZX05051) supported by the National Science and Technology Major Project （2011ZX05051）
Project(IRT1294) supported by the Program for Changjiang Scholars and Innovative Research Team in University) （IRT1294）
