Petroleum Exploration and Development >

2017 , Vol. 44 >Issue 5: 779 - 787

DOI: https://doi.org/10.11698/PED.2017.05.13

OILAND GAS FIELD DEVELOPMENT

Experiments on gas supply capability of commingled production in a fracture-cavity carbonate gas reservoir

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  • 1. State Key Laboratory of Petroleum Resource and Engineering, China University of Petroleum-Beijing, Beijing 102249, China;
    2. Exploration and Development Research Institute of PetroChina Southwest Oil & Gas Field Company, Chengdu 610041, China

Received date: 2017-02-13

  Revised date: 2017-06-13

  Online published: 2017-09-18

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Abstract

The CT scan, mercury intrusion test and commingled production physical simulation experiment of the cores of pore-type, cavity-type and fracture-cave reservoirs was conducted to study the effects of interlayer heterogeneity, drawdown pressure, water saturation and water invasion on gas supply capacity. The experimental results were verified by the radial numerical model of multilayer commingled production based on the Eclipse software. The experimental results showed that: the fracture-cavity type reservoir, with strong seepage capability, makes great contribution to gas production in the early stage, while the pore-type and cavity-type reservoirs with weak seepage capability, make more contribution to gas production in the middle and late stages; the absolute permeability of the reservoir affects its contribution to productivity, while the relative permeability of reservoir affects the total recovery; the “dynamic supply balance” state among various reservoirs can be achieved at a reasonable drawdown pressure; although the fracture-cavity reservoir is less affected by edge and bottom water, water breakthrough will first occur in this type reservoir and block other reservoirs, significantly reducing the commingled gas supply capacity and recovery.

Cite this article

WANG Lu, YANG Shenglai, LIU Yicheng, XU Wei, DENG Hui, MENG Zhan, HAN Wei, QIAN Kun . Experiments on gas supply capability of commingled production in a fracture-cavity carbonate gas reservoir[J]. Petroleum Exploration and Development, 2017 , 44(5) : 779 -787 . DOI: 10.11698/PED.2017.05.13

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