کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1755560 1522852 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Low velocity non-linear flow in ultra-low permeability reservoir
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
پیش نمایش صفحه اول مقاله
Low velocity non-linear flow in ultra-low permeability reservoir
چکیده انگلیسی

Experimental equipment is designed to investigate single-phase oil/water flow in ultra-low permeability cores, using capillary flow meter to achieve accurate measurement of fluid volume. The results confirm that the single-phase oil/water flow in ultra-low permeability cores is not consistent with Darcy's Law. Typical flow curve is a combination of straight line and concave curve. The lower permeability the core has, the stronger non-linearity the concave curve shows. Pseudo (minimum) threshold pressure gradient exists widely in utra-low permeability cores for different fluid. Physical simulation and theoretical studies have shown that the relationship between threshold pressure gradient and permeability is a power function with the power of − 1. Nonlinear factor is defined to describe nonlinear flow characteristics. Higher viscosity leads to larger nonlinear factor and wider distribution of pressure. The minimum threshold pressure gradient can be calculated by pseudo threshold pressure gradient and nonlinear factor.

▶ Use capillary flow meter measuring fluid volume in the experiment. ▶ Flow characteristic does not follow Darcy's law in ultra-low permeability. ▶ Pseudo (Min) TPG versus permeability present power function with power of –1. ▶ Nonlinear factor is defined to reflect the characteristics of nonlinear flow.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Petroleum Science and Engineering - Volume 80, Issue 1, December 2011, Pages 1–6
نویسندگان
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