Innovative Unconventional Formation Evaluation Approach in a Tight Oil Reservoir, Xinjiang Oilfield, China

DOI

10.2991/meic-15.2015.37How to use a DOI?

Keywords

Tight oil;Unconventional evaluation;Horizontal well;3D structural modeling;Stimulation design

Abstract

Complicated minerals, high total organic carbon (TOC) content, and thin interbeded layers aggravated the complexity of logging responses and made it very difficult to find the target zone of the tight oil reservoir in the Jimusaer depression in northwestern China. Horizontal well drilling is extremely difficult in the formation due tohigh heterogeneity and uncertain fault, it caused hundreds of millions of dollars' loss to drill one horizontal well without targeting the zone. To maximize oil production with low cost, an integrated solution is provided. First, we used an unconventional evaluation approach to integrate an elemental capture spectroscopy log with other logs to get accurate reservoir characteristics. Second, we built a 3D structural model to target the best reservoir. Third, we combined Reservoir Quality (RQ), Completion Quality (CQ), and 3D structural models to optimize the stimulation design and enhance production. With this approach, which integrates the RQ and CQ parameters into the 3D structural model, not only can we evaluate the effective porosity, saturation, minerals, fractures, TOC, and stress profile along the wellbore, but also can get a clear picture of these properties in 3D distribution so that multistage hydraulic fracturing design can be made more effectively and at lower cost. Application of this approach on several wells proved that it is an effective way for tight oil reservoir evaluation and production enhancement.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Guobin Wang
AU  - Fangfang Wu
AU  - Jinlong Wu
AU  - Lei Yang
PY  - 2015/04
DA  - 2015/04
TI  - Innovative Unconventional Formation Evaluation Approach in a Tight Oil Reservoir, Xinjiang Oilfield, China
BT  - Proceedings of the 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering
PB  - Atlantis Press
SP  - 151
EP  - 154
SN  - 2352-5401
UR  - https://doi.org/10.2991/meic-15.2015.37
DO  - 10.2991/meic-15.2015.37
ID  - Wang2015/04
ER  -