کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8909286 1637137 2018 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pore structure, wettability and tracer migration in four leading shale formations in the Middle Yangtze Platform, China
ترجمه فارسی عنوان
ساختار پوسته، مرطوب بودن و مهاجرت تکراری در چهار شکل اصلی تشکیل شیل در پلتفرم یانگ تزی میانی، چین
کلمات کلیدی
شیل غنی از ارگانیک، ساختار پوسته، اتصال رطوبت مهاجرت ردیاب،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
چکیده انگلیسی
Pores <50 nm account for the majority of the pore volume in these organic shales. The shapes of hysteresis loop from gas physisorption show that the pores are mostly inkbottle-shaped in Wufeng, Longmaxi and Dongyuemiao Shales, while they are mostly narrow plate- or slit-like shaped pores in Dalong Shale. These four organic shales are strongly oil-wetting and moderately water-wetting. According to the imbibition behaviors toward aqueous (deionized water) and oleic (n-decane) phases, hydrophobic pores are better connected than hydrophilic pore networks, which is consistent with the measured contact angles. Diffusion of nano-sized nonsorbing (perrhenate [ReO4−]) and sorbing (cesium [Cs+]) tracers into brine-saturated shales indicates a high spatial variability and limited pore connectivity in these organic shales. The effective diffusion coefficient values are on the order of 10−13 m2/s with an associated geometric tortuosity ranging from 11.1 to 41.4. Due to the limited edge-connected pore spaces and low diffusion coefficients, the migration of hydrocarbons will be very slow from the shale matrix to hydraulically created fractures, with the initially high production of hydrocarbons from connected pore spaces near the sample edge (e.g., fracture face).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine and Petroleum Geology - Volume 89, Part 2, January 2018, Pages 415-427
نویسندگان
, , , , , , ,