Xinjiang Petroleum Geology

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    EFFECT OF REFREEZING TECHNOLOGY ON CORE PHYSICAL PARAMETERS AND THEIR CORRECTION
    Zhao Fuzhen, Zeng Xiangmin, Chen Xinhua
    Xinjiang Petroleum Geology    1997, 18 (4): 389-391.  
    Abstract （211）      PDF（pc） （244KB）（231）       Save
    Using core refreezing technology to refreeze unconsolidated core from watered out area and heavy oil area can make core shape, prevent volatilization loss of fluid in core, and be favourable to determine the parameters as fuid saturation and the like. But fluid expansion of core resulted from refreezing can destroy pore structure of core, make physical parameters before and after refreezing change. Based on correlation analyses, this paper discussed changing regularity of porosity, peme-ability and saturation etc, presented a correction equation of porosity and correction factor of peme-ability, put forward step correction method of saturation, providing convient conditions for oilfield to properly use physical analysis data of refrozen core.
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    PILOT SIEAMFLOODING IN THE SHALLOW AND THIN HEAVY OIL RESERVOIR, 0 AREA, JINGLOU OILFIELD: A COMPREHENSIVE EVALUATION
    Hu Changhong, Liu Xinfu, Ma Chao
    Xinjiang Petroleum Geology    1997, 18 (3): 282-286.  
    Abstract （145）      PDF（pc） （399KB）（353）       Save
    It is a typical pilot steamflooding of shallow and thin extra-viscous oil reservoir. It has two sags: steam simulation and steam drive. This paper systematically describes the technical strategy of steamflood of such reservoir based on the reservoir geology and seamflooding recovery characteristics and holds a comprehensive evaluation of steamflooding performance in terms of active reservoir behavior, development index and economic index.
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    INTERMTTENT STEAM INJECTION- AN IMPORTANT METHOD FOR ENHANCING STEAM FLOODING EFFICIENCY
    Liu Xinfu, Song Pengrui
    Xinjiang Petroleum Geology    1997, 18 (1): 87-90.  
    Abstract （193）      PDF（pc） （340KB）（384）       Save
    After steam breakthrough, intermittent steam injection process can control steam channeling, enhance steam specific volume, sweep volume, steam quality, oil phase relative permeability and thermal efficiency, and establish the mechanism of imbibition displacement. It performed well while used in the pilot Area 0 of Jinglou oilfield. Field test and numerical simulation study showed that the optimized intermittent steam injection cycle is 30 days in thin heavy oil reservoir and steam injection rate should be 1. 5 times as continus steam injection rate; in a large sized waterflooding block, the injection wells at a row are designed as a unit, and the injection period in two adjacent rows of steam injection well should superimpose by 50%.
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