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孤岛油田中二北馆5热采区属于具有边底水的薄层、高渗、强非均质性稠油油藏。该区于1992年8月新钻油井40口,采用200 × 283m反九点法井网进行注蒸汽吞吐开采。在开发过程中由于受水侵影响,使热采区含水上升率和产量递减加大,降低了采油速度和采收率,严重影响了开发效果。为此,在进行了水侵方式及其对蒸汽吞吐开采效果影响研究的基础上,优选配套工艺,发展完善了一套适用于薄层边底水稠油油藏治水增油综合治理模式:优选热采区中部含水较高的热采井实施高温封堵,对更新完善井提高避射底界,可有效降低单井含水,提高蒸汽吞吐开发效益。从而达到改善稠油热采开发效果的目的。
Gudao Oilfield Zhong Er North Hall 5 thermal recovery area belongs to a thin layer, high permeability, strong heterogeneous heavy oil reservoir with edge water. In August 1992, the district drilled 40 newly-drilled oil wells and adopted 200 × 283m anti-nine-point well pattern for steam stimulation. In the process of development, due to the influence of water intrusion, the rate of increase of water cut in the thermal recovery area and the decrease of output are increased, which reduces the oil recovery rate and oil recovery and seriously affects the development effect. Therefore, based on the research on water intrusion and its effect on steam huff and puff, it is necessary to optimize the supporting technology and to develop and perfect a set of comprehensive control modes for flood control and heavy oil recovery of heavy oil reservoirs with thin edges and edges: optimization High thermal recovery wells in the middle of the thermal recovery area have high-temperature plugging, which can improve the well and raise the bottom of avoidance and can effectively reduce single-well water and improve the efficiency of steam stimulation. So as to achieve the purpose of improving the development effect of heavy oil thermal recovery.