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Study on characteristics of well-test type curves for composite reservoir with sealing faults

Petroleum 2018年第3期4卷 309-317页

作者： Qiguo Liu Heng Lu Longxin Li Aiting Mu School of Oil&Gas Engineering Southwest Petroleum UniversityChengduSichuanPR China Exploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company PR China

The pressure response for the composite reservoirs with a sealing fault locating in inner and outer region is different,which neglected by previous researchers,would cause significant errors during well-test interpretations.Based on seepage theory,a well-test model of two-region radial composite reservoir with infinite outer boundary has been built in this study considering wellbore storage and skin effects.The solutions for this model and characteristics of the type curves have been analyzed by applying the method of mirror image,Laplace transformation and superposition principle,including a straight fault,a perpendicular fault and parallel faults cases.The study shows that the dimensionless pressure derivative curves would be obviously different in two cases:the well to fault distance is larger,and smaller than the half length of the inner-region radius.Therefore,type curves are presented with reasonable parameters to analyze the distance effect on the dynamic pressure response.The results in this study are of great significance。

关键词： composite reservoir Sealing faults Well-test interpretation Dynamic pressure response Superposition principle

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Interpretation of Temperature Profiles during Soak Periods in Steam-stimulated Wells

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Petroleum Science 2007年第4期4卷 74-79页

作者： Liu Huiqing Zhang Hongling Wang Peixi Key Laboratory of Petroleum Engineering under Ministry of Education China University of Petroleum Beijing 102249 China

To address the problems existing in testing steam injection profiles in a steam-stimulated well during steam injection and production periods, this paper proposes that the temperature profile in the completion interval could be tested during the soak period. A mathematical model for calculating the vertical distribution of temperature in a single layer reservoir is established based on the temperature characteristics of steam stimulated reservoirs, and the vertical distribution of temperature in a single layer reservoir could be obtained and heat loss could be calculated. The temperature, which is disturbed by thermal conduction in a multilayer reservoir, and heat loss could be derived based on the superposition principle of temperature potential. This paper establishes a multilayer testing temperature profile interpretation method and interprets the actual test temperature profile of Well Gao 3-7-66. The results indicate that the temperature profile in the soak period can reflect the thermal absorption conditions in various reservoir beds.

关键词： Steam stimulation production logging composite reservoir profile mathematical model

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