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| Method of recognizing preferred water flow channels with dimensionless pressure drop curve |
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GU Jian wei1,2, ZHANG Xiu mei1, ZHENG Jia peng2,3, FAN Zhao ya1
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(1.School of Petroleum Engineering in China University of Petroleum, Qingdao 266555, China;2.College of Petroleum Engineering in China University of Petroleum, Beijing 102249, China;3.Drilling and Production Technology Research Institute of Jidong Oilfield Branch, PetroChina, Tangshan 063004,China)
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| Abstract: |
| Based on fundamental well test theory, the formula of dimensionless bottom hole pressure drop was derived. With the information of shallow reservoir in Jidong Oilfield, the numerical concept model of well groups was established. The dimensionless pressure drop plate under seven different permeability ranges and ten permeability difference coefficients were calculated and analyzed. The theoretical analysis and numerical concept model calculation results show that the dimensionless pressure drop can eliminate the effects of injection water volume, thick of water absorption lay, formation pressure on the bottom hole pressure drop. Under the studied reservoir conditions, the preferred water flow channels form when the permeability difference coefficient is greater than 6. |
| Key words: Jidong Nanpu Oilfield wellhead pressure drop curve dimensionless bottom hole pressure drop plate preferred water flow channel permeability difference coefficient |
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