Authors:
Houqin Zhu
;
Yuzhong Xing
and
Xiangwen Kong
Affiliation:
Research Institute of Petroleum Exploration and Development, PetroChina and Beijing, China
Keyword(s):
Liquid hydrocarbon, pyrolysis experiment, hydrogen index, planar distribution, Duvernay Shale, West Canadian Sedimentary Basin (WCSB)
Abstract:
The pyrolysis experiment data and production data are applied to predict the planar distribution of liquid hydrocarbons in shale gas. On the basis of the variation of pyrolysis experiment parameters of samples before and after extraction, the quantitative relations of △S2 with Ro, △S2/S2 with Ro, △HI with Ro and △HI with HIunextracted are established and HIunextracted is corrected. Combined with the production data, the quantitative relation of HI with CGR is established. The planar distribution diagram of HI values is plotted, and based on the division standard for different grade of liquid hydrocarbons, the planar distribution of different grade of liquid hydrocarbons is predicted quantitatively. The results indicate that, (1) the pyrolysis comparison experiments before and after extraction indicate that △S2, △S2/S2 and △HI have a good correlation with Ro, △HI also has good correlation with HIunextracted, and these quantitative relations can be used to correct HIunextracted. (2) Th
e corrected HI has a very good correlation with CGR, and the planar distribution of all grades of liquid hydrocarbons can be predicted according to HI. (3) The dry gas is distributed mainly in the structural deformation belt and Leduc ring reef belt. The northeast region of the study area is mainly a rich oil region. Gas condensate, rich gas condensate and very rich gas condensate are distributed in NW-SE banded shape from Simonette to Willesden Green.
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