Detecting Microbially Induced Calcite Precipitation in a Model Well-Bore Using Downhole Low-Field NMR [electronic resource]

 0 Người đánh giá. Xếp hạng trung bình 0

Tác giả:

Ngôn ngữ: eng

Ký hiệu phân loại: 502.1 Miscellany

Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Office of the Assistant Secretary of Energy for Fossil Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2016

Mô tả vật lý: Size: p. 1537-1543 : , digital, PDF file.

Bộ sưu tập: Metadata

ID: 257349

 Microbially induced calcite precipitation (MICP) has been widely researched recently due to its relevance for subsurface engineering applications including sealing leakage pathways and permeability modification. These applications of MICP are inherently difficult to monitor nondestructively in time and space. Nuclear magnetic resonance (NMR) can characterize the pore size distributions, porosity, and permeability of subsurface formations. This investigation used a low-field NMR well-logging probe to monitor MICP in a sand-filled bioreactor, measuring NMR signal amplitude and <
 i>
 T<
 /i>
 <
 sub>
 2<
 /sub>
  relaxation over an 8 day experimental period. Following inoculation with the ureolytic bacteria, <
 i>
 Sporosarcina pasteurii<
 /i>
 , and pulsed injections of urea and calcium substrate, the NMR measured water content in the reactor decreased to 76% of its initial value. <
 i>
 T<
 /i>
 <
 sub>
 2<
 /sub>
  relaxation distributions bifurcated from a single mode centered about approximately 650 ms into a fast decaying population (<
 i>
 T<
 /i>
 <
 sub>
 2<
 /sub>
  less than 10 ms) and a larger population with <
 i>
 T<
 /i>
 <
 sub>
 2<
 /sub>
  greater than 1000 ms. The combination of changes in pore volume and surface minerology accounts for the changes in the <
 i>
 T<
 /i>
 <
 sub>
 2<
 /sub>
  distributions. Destructive sampling confirmed final porosity was approximately 88% of the original value. Here, these results indicate the low-field NMR well-logging probe is sensitive to the physical and chemical changes caused by MICP in a laboratory bioreactor.
Tạo bộ sưu tập với mã QR

THƯ VIỆN - TRƯỜNG ĐẠI HỌC CÔNG NGHỆ TP.HCM

ĐT: (028) 71010608 | Email: tt.thuvien@hutech.edu.vn

Copyright @2024 THƯ VIỆN HUTECH