砂泥薄互层稠油边际油藏经济开发方式  

Economic development plan for viscous crude marginal pool of thin multilateral sand and shale

作　　者：张人玲[1] 唐湘明[2] 

机构地区：[1]中国石化国际石油勘探开发公司 [2]中国石化江苏油田地质科学研究院

出　　处：《石油勘探与开发》2004年第1期100-102,共3页Petroleum Exploration and Development

摘　　要：边际油藏的开发可行性必须将开发方式与经济效益紧密结合来评价。江苏油田的韦5断块属中低渗、砂泥薄互层的普通稠油油藏,可归于边际油田。对该油藏的室内微观驱油机理研究、油藏数值模拟研究表明,注入水温度对其驱油效率和开发效果影响不大,冷、热水驱替及CO2吞吐的启动压力均较高而驱油效率不高,较经济的开发方式为降压开采一段时间后转入注水或蒸汽吞吐或蒸汽吞吐转水驱。结合矿场开发先导性试验结果,韦5断块稠油油藏应采用注改性水方式开发,以降低注水压力,提高注水效果;对条件合适的生产井进行短缝压裂,提高单井产能;选择部分条件具备的井蒸汽吞吐,以提高采油速率,从而提高开发效果和总体经济效益。It is more risky for developing a marginal pool than that of conventional one, the feasibility must be evaluated by integrate its developing strategy and economic benefits. Block Wei 5 of the Jiangsu Oilfield is a marginal field with middle and low permeability and the thin multilateral sand and shale. The microcosmic research on the oil displacement and quantitative simulation results indicate that oil displacement and development are hardly affected by the injection water temperatures. The startup pressures are high and the displacement efficiencies are low in both kinds of experiments of oil displacement by waters with different temperature and carbon dioxide soak. Using depleted water injection method and cyclic steam stimulation can economically develop this kind of oil reservoir, or steam soaks and then water injection successively. According to the results of pilot tests in the area, modified water injection should be used in the development of Block Wei 5 viscous crude reservoir. Water injection effect can be improved by depressing the water injection. Productivities of suitable single well can be increased by hydraulic fracturing with short fractures. All of oil production rate, development efficiency and total economic benefit can be increased when some suitable wells are operated by cyclic steam stimulation.

关 键 词：稠油油藏 经济开发方式 微观驱油 蒸汽吞吐 水力压裂 注改性水 

分 类 号：TE345[石油与天然气工程—油气田开发工程]