渤海海域PLA含油构造稠油特征及稠变因素分析

Analysis of heavy oil characteristics and densification factors of PLA oil-bearing structures in the water area of Bohai

海域油藏开发经济门限高,对稠油油藏来说,选取合理的开采技术提高产能、扩大经济效益将是重中之重。通过对PLA含油构造区稠油物理特征、原油稠变环境以及影响原油稠变因素分析,总结出该区原油具有"三高三低"的稠油特点,属于普通稠油-特稠油;原油稠变主要因素是地层埋藏浅、温度低,保存条件差以及强生物降解和水洗作用。

As the economic threshold of offshore oilfield development is high,selecting the reasonable production technique to enhance productivity and economic benefit is of the highest importance for heavy oil reservoir.Through the analysis of heavy oil characteristics,densification environment and densification factcors of PLA oil-bearing structures in the water area of Bohai,the crude oil is summarized to be of the characteristics of 'three-low and three-high',belonging to conventional heavy and extra-high reservoir.The densification factors are found to be shallow buried depth,low temperature,poor preserving conditions,strong biodegradation and water washing,which provides good guidance for heavy oil reservoir development and thermal production technology of heavy oil.