Abstract
Reservoir engineers are frequently faced with a very difficult question, thought to be a simple one, when attempting to analyze pressure transient test data. Correct model identification that can be used to analyze test data is ought to be a very simple exercise due to numerous analytical models, which are published in the literature. However, dealing with almost a black box situation "Underground Reservoir," it is still difficult today to identify a reservoir model that represents a particular test. In fact, the pressure derivative technique in identifying flow regimes that pressure behavior undergoes during the well testing has introduced another dimension and is considered to be an important step in analyzing pressure transient tests. However, the non-uniqueness in model responses, which produces similar pressure derivatives, hinders the engineers, and most often causes in taking a wrong decision. This study looks into non-unique model response, introduces a simplistic method using numerical simulator and any reservoir information available in eliminating non-realistic solutions. Analysis of actual well test data, to obtain the very basic properties, and integrating any other available data, one can build different model realizations. An actual model was build by history matching the pressure derivative that helped reducing the problem of non-uniqueness response.
| Original language | English |
|---|---|
| Pages (from-to) | 879-899 |
| Number of pages | 21 |
| Journal | Petroleum Science and Technology |
| Volume | 21 |
| Issue number | 5-6 |
| Publication status | Published - May 2003 |
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Keywords
- Aquifer
- Composite system
- Dual permeability
- Dual porosity
- Identification
- Interporosity
- Multiple realizations
- Partial sealing
- Pressure derivative
- Reservoir modeling
- Transient
- Well testing
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
- Fuel Technology
- Geotechnical Engineering and Engineering Geology
- Energy Engineering and Power Technology
Cite this
The challenge of model identification in well test interpretation - A unique build up analysis case study. / Al-Bemani, Ali S.; Guo, Boyun; Ghalambor, Ali.
In: Petroleum Science and Technology, Vol. 21, No. 5-6, 05.2003, p. 879-899.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The challenge of model identification in well test interpretation - A unique build up analysis case study
AU - Al-Bemani, Ali S.
AU - Guo, Boyun
AU - Ghalambor, Ali
PY - 2003/5
Y1 - 2003/5
N2 - Reservoir engineers are frequently faced with a very difficult question, thought to be a simple one, when attempting to analyze pressure transient test data. Correct model identification that can be used to analyze test data is ought to be a very simple exercise due to numerous analytical models, which are published in the literature. However, dealing with almost a black box situation "Underground Reservoir," it is still difficult today to identify a reservoir model that represents a particular test. In fact, the pressure derivative technique in identifying flow regimes that pressure behavior undergoes during the well testing has introduced another dimension and is considered to be an important step in analyzing pressure transient tests. However, the non-uniqueness in model responses, which produces similar pressure derivatives, hinders the engineers, and most often causes in taking a wrong decision. This study looks into non-unique model response, introduces a simplistic method using numerical simulator and any reservoir information available in eliminating non-realistic solutions. Analysis of actual well test data, to obtain the very basic properties, and integrating any other available data, one can build different model realizations. An actual model was build by history matching the pressure derivative that helped reducing the problem of non-uniqueness response.
AB - Reservoir engineers are frequently faced with a very difficult question, thought to be a simple one, when attempting to analyze pressure transient test data. Correct model identification that can be used to analyze test data is ought to be a very simple exercise due to numerous analytical models, which are published in the literature. However, dealing with almost a black box situation "Underground Reservoir," it is still difficult today to identify a reservoir model that represents a particular test. In fact, the pressure derivative technique in identifying flow regimes that pressure behavior undergoes during the well testing has introduced another dimension and is considered to be an important step in analyzing pressure transient tests. However, the non-uniqueness in model responses, which produces similar pressure derivatives, hinders the engineers, and most often causes in taking a wrong decision. This study looks into non-unique model response, introduces a simplistic method using numerical simulator and any reservoir information available in eliminating non-realistic solutions. Analysis of actual well test data, to obtain the very basic properties, and integrating any other available data, one can build different model realizations. An actual model was build by history matching the pressure derivative that helped reducing the problem of non-uniqueness response.
KW - Aquifer
KW - Composite system
KW - Dual permeability
KW - Dual porosity
KW - Identification
KW - Interporosity
KW - Multiple realizations
KW - Partial sealing
KW - Pressure derivative
KW - Reservoir modeling
KW - Transient
KW - Well testing
UR - http://www.scopus.com/inward/record.url?scp=0038002894&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0038002894&partnerID=8YFLogxK
M3 - Article
VL - 21
SP - 879
EP - 899
JO - Petroleum Science and Technology
JF - Petroleum Science and Technology
SN - 1091-6466
IS - 5-6
ER -