Productivity and oil fingerprinting: Application of analytical chemistry in the assessment of reservoir quality
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Productivity and oil fingerprinting : Application of analytical chemistry in the assessment of reservoir quality. / Nielsen, Julie; Poulsen, Kristoffer G.; Christensen, Jan H.; Lassen, Charlotte; Sølling, Theis I.
In: Journal of Petroleum Science and Engineering, Vol. 195, 107914, 12.2020.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Productivity and oil fingerprinting
T2 - Application of analytical chemistry in the assessment of reservoir quality
AU - Nielsen, Julie
AU - Poulsen, Kristoffer G.
AU - Christensen, Jan H.
AU - Lassen, Charlotte
AU - Sølling, Theis I.
PY - 2020/12
Y1 - 2020/12
N2 - The ability to understand and possibly even predict the productivity of wells across a field is an important accomplishment in a production setting. In the tight Lower Cretaceous chalk field Valdemar, 5 wells have been observed to produce significantly larger oil volumes compared to nearby wells. This study was conducted to map the inter-well differences in the oil composition to better understand the productivity differences. This was done by analyzing any chemical differences of 21 samples from 16 different wells by GC-MS and principal component analysis of summed extracted ion chromatograms (SICs) using the chemometric analysis of selected ion chromatograms (CHEMSIC) method. The sterane (m/z 217 and m/z 218) and C4 (m/z 234) biomarker SICs were found to have chemically meaningful features described by principal component 1 (PC1). The association between these markers and the relative production was modeled to provide a better understanding of the productivity of the different wells. A correlation between oil saturation and productivity was established in the sense that the more mature and thus less viscous oil seem to have charged certain favorably placed reservoir sections first; these locations coincide with the location of the 5 wells in question.
AB - The ability to understand and possibly even predict the productivity of wells across a field is an important accomplishment in a production setting. In the tight Lower Cretaceous chalk field Valdemar, 5 wells have been observed to produce significantly larger oil volumes compared to nearby wells. This study was conducted to map the inter-well differences in the oil composition to better understand the productivity differences. This was done by analyzing any chemical differences of 21 samples from 16 different wells by GC-MS and principal component analysis of summed extracted ion chromatograms (SICs) using the chemometric analysis of selected ion chromatograms (CHEMSIC) method. The sterane (m/z 217 and m/z 218) and C4 (m/z 234) biomarker SICs were found to have chemically meaningful features described by principal component 1 (PC1). The association between these markers and the relative production was modeled to provide a better understanding of the productivity of the different wells. A correlation between oil saturation and productivity was established in the sense that the more mature and thus less viscous oil seem to have charged certain favorably placed reservoir sections first; these locations coincide with the location of the 5 wells in question.
KW - CHEM-SIC
KW - GC-MS
KW - Oil fingerprinting
KW - PCA
KW - Reservoir quality
U2 - 10.1016/j.petrol.2020.107914
DO - 10.1016/j.petrol.2020.107914
M3 - Journal article
AN - SCOPUS:85090987687
VL - 195
JO - Journal of Petroleum Science and Engineering
JF - Journal of Petroleum Science and Engineering
SN - 0920-4105
M1 - 107914
ER -
ID: 249170397