摘要
示踪剂井间监测可用来测试油藏动态参数，现场是用理论曲线与实测示踪剂产出曲线拟合来计算油藏动态参数，其中示踪剂的扩散常数目前还没有资料提供，国内只是借用某种示踪剂在某一特定条件下的扩散常数值，而没有考虑油藏的地质条件、示踪剂的类型对扩散常数的影响，给计算带来一定的误差。文中介绍了示踪剂扩散常数的室内测定方法，给出了示踪剂产出曲线解释方法（利用一维均质及微观非均质渗流扩散模型解析解与实测岩心的示踪剂产出曲线进行拟合反求模型参数）和进而求出扩散常数的方法；测定了３种不同的示踪剂以不同的浓度通过渗透率不同的岩心时的扩散系数。实测结果表明，岩心渗透率增加，扩散常数增大；示踪剂不同，扩散常数不同；示踪剂浓度增加，扩散常数增大；天然非均质岩心的扩散常数远高于均质填砂模型岩心的扩散常数。
Tracer testing is a new method that is being applied to determine reservoir
parameters. By analyzing the production curves, parameters such as the transverse and
longitudinal heterogeneity of reservoir, the residual oil saturation and other parameters of
waterflooding formation can be determined. An important parameter in the analyzing process is
the dispersion constant of tracers. Now there is no conference that gives this parameter, and a
special dispersion constant (0.01524 m) of one tracer under a certain conditions has been used,
but does not consider the influence of the geological feature of the reservoir and the properties
of the tracers. Thus the reservoir performance parameters calculated in this way would have
some error. An experimental system imitating the tracer flowing in the reservoir have been built
up and two analytic solutions deduced from the two numerical dispersion model in one
dimension in this paper were used to deal with experimental datum. The dispersion constants
of three tracers (NaCl, NH4SCN, NH4NO3) have been determined under different conditions. The
results showed that the dispersion constant relating to the concentration and the type of tracers,
the permeability and type of reservoir rock.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1999年第3期87-89,共3页
Petroleum Exploration and Development
