A discussion on the interrelationships between five properties in reservoir evaluation
Reservoir pore spaces (incl. pores, fractures and vugs) are too complex to be predicted by use of the traditional interrelationships between the four properties of reservoirs, thus more and more contradictions occur in reservoir evaluation. A great number of case studies were made to reveal the caus...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2015-03-01
|
| Series: | Natural Gas Industry B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352854015000303 |
| _version_ | 1797283610806452224 |
|---|---|
| author | Liangxiao Zhao Mingjiang Chen |
| author_facet | Liangxiao Zhao Mingjiang Chen |
| author_sort | Liangxiao Zhao |
| collection | DOAJ |
| description | Reservoir pore spaces (incl. pores, fractures and vugs) are too complex to be predicted by use of the traditional interrelationships between the four properties of reservoirs, thus more and more contradictions occur in reservoir evaluation. A great number of case studies were made to reveal the causes of these contradictions and the corresponding solutions were also proposed. For the reservoirs with complex pore spaces, we found four common types of contradictions between porosity and permeability, porosity and water saturation, absolute permeability and effective permeability, and electrical property and hydrocarbon property. These contradictions are mainly caused by variation of pore types, pore-throat sizes and fracture occurrence. On this basis, the concept of geometrical property was presented and methods were discussed for qualitatively or quantitatively describing the geometrical properties of pores, fractures and vugs. The following findings were achieved. (1) For pores, two relationships were established between pores & throat sizes and rock textures, physical property & fluid property, and between pore types and fluid property & logging responses. (2) For fractures, five relationships were established between occurrence and pore texture index (m), radial extension and deep/shallow borehole resistivity, openness and fracture permeability, occurrence and matrix water saturation, and between development index and lithology. (3) For vugs, two relationships were established between size & connectivity and m value & three porosities derived from logging responses (neutron, density and sonic wave), and filling degree and logging responses. The interrelationships between geometrical property, lithology, physical property, fluid property and electrical property can significantly improve the evaluation of complex reservoirs such as carbonates. |
| first_indexed | 2024-03-07T17:33:11Z |
| format | Article |
| id | doaj.art-91591565e52f4257b4284dbbc9127978 |
| institution | Directory Open Access Journal |
| issn | 2352-8540 |
| language | English |
| last_indexed | 2024-03-07T17:33:11Z |
| publishDate | 2015-03-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Natural Gas Industry B |
| spelling | doaj.art-91591565e52f4257b4284dbbc91279782024-03-02T17:24:40ZengKeAi Communications Co., Ltd.Natural Gas Industry B2352-85402015-03-012213614310.1016/j.ngib.2015.07.002A discussion on the interrelationships between five properties in reservoir evaluationLiangxiao ZhaoMingjiang ChenReservoir pore spaces (incl. pores, fractures and vugs) are too complex to be predicted by use of the traditional interrelationships between the four properties of reservoirs, thus more and more contradictions occur in reservoir evaluation. A great number of case studies were made to reveal the causes of these contradictions and the corresponding solutions were also proposed. For the reservoirs with complex pore spaces, we found four common types of contradictions between porosity and permeability, porosity and water saturation, absolute permeability and effective permeability, and electrical property and hydrocarbon property. These contradictions are mainly caused by variation of pore types, pore-throat sizes and fracture occurrence. On this basis, the concept of geometrical property was presented and methods were discussed for qualitatively or quantitatively describing the geometrical properties of pores, fractures and vugs. The following findings were achieved. (1) For pores, two relationships were established between pores & throat sizes and rock textures, physical property & fluid property, and between pore types and fluid property & logging responses. (2) For fractures, five relationships were established between occurrence and pore texture index (m), radial extension and deep/shallow borehole resistivity, openness and fracture permeability, occurrence and matrix water saturation, and between development index and lithology. (3) For vugs, two relationships were established between size & connectivity and m value & three porosities derived from logging responses (neutron, density and sonic wave), and filling degree and logging responses. The interrelationships between geometrical property, lithology, physical property, fluid property and electrical property can significantly improve the evaluation of complex reservoirs such as carbonates.http://www.sciencedirect.com/science/article/pii/S2352854015000303Reservoir (rock)PoresFracturesVugPore spaceEvaluationGeometrical propertyLithologyPhysical propertyFluid propertyResistivity |
| spellingShingle | Liangxiao Zhao Mingjiang Chen A discussion on the interrelationships between five properties in reservoir evaluation Natural Gas Industry B Reservoir (rock) Pores Fractures Vug Pore space Evaluation Geometrical property Lithology Physical property Fluid property Resistivity |
| title | A discussion on the interrelationships between five properties in reservoir evaluation |
| title_full | A discussion on the interrelationships between five properties in reservoir evaluation |
| title_fullStr | A discussion on the interrelationships between five properties in reservoir evaluation |
| title_full_unstemmed | A discussion on the interrelationships between five properties in reservoir evaluation |
| title_short | A discussion on the interrelationships between five properties in reservoir evaluation |
| title_sort | discussion on the interrelationships between five properties in reservoir evaluation |
| topic | Reservoir (rock) Pores Fractures Vug Pore space Evaluation Geometrical property Lithology Physical property Fluid property Resistivity |
| url | http://www.sciencedirect.com/science/article/pii/S2352854015000303 |
| work_keys_str_mv | AT liangxiaozhao adiscussionontheinterrelationshipsbetweenfivepropertiesinreservoirevaluation AT mingjiangchen adiscussionontheinterrelationshipsbetweenfivepropertiesinreservoirevaluation AT liangxiaozhao discussionontheinterrelationshipsbetweenfivepropertiesinreservoirevaluation AT mingjiangchen discussionontheinterrelationshipsbetweenfivepropertiesinreservoirevaluation |