低渗透油藏合理井距计算的理论推导及对比研究  

Theoretical Derivation and Comparison Study of the Reasonable Limit Injection-Production Spacing for Low Permeability Reservoirs

作　　者：张枫[1] 董萍[2] 秦建敏[2] 李玉江[2] 邓以清[2] 易继贵[2] 

机构地区：[1]燕山大学车辆与能源学院,河北秦皇岛066004 [2]中国石油大港油田公司,天津300280

出　　处：《天然气地球科学》2009年第4期627-630,共4页Natural Gas Geoscience

摘　　要：低渗透储层孔喉细小,比表面大,渗流阻力大,存在启动压力梯度,这些因素增加了低渗透油田注水开发的难度。因此,低渗透油藏合理开发必须克服启动压力梯度的影响,才能在注采井间建立有效的驱动体系。从渗流力学出发,采用2种方式对低渗透油藏极限注采井距进行了系统的理论推导。根据我国部分已开发低渗透油藏建立的启动压力梯度和渗透率经验公式,计算了在不同注采压差和渗透率条件下的极限注采井距。Thin pore throats, large specific surface area and large percolation resistance of low permeability reservoirs and start-up pressure gradient increase the difficulties of water-injection development. So, building efficient driving systems between injection well and production well must conquer the influence of the start-up pressure gradient. Based on percolation theory, two methods are adopted to derive the limit injection-production spacing of the low permeability reservoir. According to the relative experienced formulas established in different low permeability reservoirs in China, the limit spacing is calculated under different permeability and different injection-production pressure differences.

关 键 词：低渗透油藏 极限注采井距 理论推导 对比研究 

分 类 号：TE32[石油与天然气工程—油气田开发工程]