河南油田浅薄层稠油开发技术试验研究

河南稠油油藏埋藏浅,厚度薄,原油粘度高,按照当时国内外稠油油藏蒸汽开发筛选标准,绝大部分油藏不能投入开发.借鉴国内外稠油开发经验,针对本油田的实际情况,通过合理划分层系、优化射孔井段、合理有效地动态调配注采参数、实施组合注汽技术及强排等措施,使浅薄层特超稠油注蒸汽吞吐开发技术获得了成功,并形成了一整套完善的开发技术程序.为了进一步提高稠油资源动用程度和开发效果,不断探索新技术和新方法,先后开展了水平压裂辅助蒸汽驱、螺杆泵出砂冷采、热水驱、间歇汽驱等新技术的矿场试验和推广应用,使河南油田浅薄层稠油资源动用程度由原来的8.3%提高到了75%,为河南油田近10年的稳产起到了重要的作用

Development technologies for shallow and thin heavy-oil reservoir in Henan Oilfield

The heavy-oil reservoir in Henan Oilfield is characterized by shallow buried depth,thin oil reservoir and viscosity of crude oil.According to the international and China’s screening standards of steam stimulation,most of heavy-oil resources could not be developed by means of conventional steam stimulation.Based on the characteristics of the heavy-oil reservoirs in Henan Oilfield,a series of works of steam stimulation was carried out,including rationally dividing layer series of development,optimizing perforation well section,dynamically adjusting injection-production parameters,assembling stimulation,forcing fluid withdrawal.So,the steam simulation in this kind of shallow and thin heavy-oil reservoirs has achieved successful results in both technology and economy,and a set of perfect recovery program has been set up.In order to further enhance the degree of utilizing heavy-oil resources and the effect of heavy-oil recovery,some new technologies and methods were studied and tested,such as cold heavy-oil production,horizontal fracturing assisted steam flooding technology,hot-water flooding and intermittent steam flooding.The producing reserves rate of heavy-oil resources increased from 8.3 percent to 75 percent by the use of these technologies,and the heavy-oil production of Henan Oilfield was stable in later decade.