摘要
目前评价石油低渗透储层安全损害状况时,缺少对流体渗流的分析,导致评价适用度较低。为此,提出石油低渗透储层安全损害评价方法。构建流体渗流模型,利用流体偏差因子以及流体黏度得出储层空隙间流体压力;预判储层是否存在损害,若存在则通过计算储层的真实表皮系数总和,即储层附加阻力总和,得出储层低渗透流体对底层的损害深度;利用表皮系数和渗透率间的关系进行描述,实现石油低渗透储层安全损害评价。实验结果表明,所提方法能够较全面地对石油低渗透储层进行安全损害评价。
At present,when evaluating the safety damage status of petroleum low-permeability reservoirs,the lack of analysis of fluid seepage results in low applicability of the evaluation.For this reason,a safety damage evaluation method for oil low-permeability reservoirs was proposed.Construct fluid seepage model,used fluid deviation factor and fluid viscosity to obtain fluid pressure between reservoir pores;predicted whether there was damage to the reservoir,and if so,calculated the sum of the true skin coefficient of the reservoir,that was,the sum of additional resistance of the reservoir.The depth of damage to the bottom layer by the low-permeability fluid of the reservoir was described;the relationship between the skin coefficient and the permeability was used to describe the safety damage evaluation of the low-permeability oil reservoir.The experimental results showed that the proposed method could comprehensively evaluate the safety damage of oil low-permeability reservoirs.
作者
侯祥丽
邓璐
Hou Xiangli;Deng Lu(Shanghai Changhai Hospital,Shanghai 200433,China)
出处
《能源与环保》
2021年第9期142-148,共7页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
青年科学基金项目(51352882)。
关键词
低渗透
安全损害
损害评价
流体模型
low permeability
safety damage
damage evaluation
fluid model
