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| Anisotropy of areal reservoir permeability estimated by TDS technique |
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LUO Yin-fu1,2,LONG Zheng-feng3,MA Zhong-liang4
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(1. CNOOC Research Center, Beijing 100027,China;2. Faculty of Petroleum Engineering in China University of Petroleum, Beijing 102249, China ;3. Chuan Dongbei Gas Field，Southwest Oil and Gas Field Company，PetroChina, Dazhou 635000, China-;4. Planning and Design Institute, East China Company，SIN OPEC ^ Nanjing 210036, China)
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| Abstract: |
| To determine areal anisotropy in hydrocarbon reservoirs without tiring type-curve matching, a new method based on TDS (Tiab's direct synthesis) technique was presented to estimate the maximum and minimum directional permeability and its azimuth angle, average areal permeability as well as anisotropy degree. Firstly, the interference test pressure and pressure derivative curves of areal anisotropic reservoir were drawn. Then, the directional permeability between activation well and observation well was estimated by pressure and pressure derivative as well as dimensionless time at intersection point. Finally, the estimated directional permeability was incorporated into the quantitative calculation model of anisotropic permeability of the observation well, and the model can be solved. The results agree well with the results of field test. |
| Key words: areal permeability directional permeability azimuth angle interference test TDS technique |
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