姬塬油田黄3长8油藏欠注井治理对策

黄3区块作为姬塬油田重要的增储上产区块之一,其主力开采油层三叠系长8油藏属典型的超低渗透油藏,近年来注水井欠注现象尤为明显。为了有效补充黄3长8油藏地层能量,降低油层产量的递减,通过对长8储层特征、注入水配伍性、井筒治理、注水系统进行研究,从地层、井筒、地面注水系统三方面分析了导致注水井欠注的原因,结合现场实际情况提出相应的治理措施,并对治理效果进行了评价,为下步治理同类油藏提供借鉴。

Rearch on countermeasures for insufficient injectors of Huang-3 Chang-8 Reservoir of Jiyuan Oilfield

As one of the important block for increasing the reserves and production of Jiyuan Oilfield, the major producing oil layer of Triassic Chang-8 reservoir of Huang-3 block belongs to typical super low permeability reservoir. In recent years under injection of injection wells is particularly obvious. In order to effectively replenish the formation energy of Huang-3 Chang-8 reservoir and reduce productioin decline of the Oilfield, this paper analyzed the causes for under injection of injectors in terms of formation, wellbore and surface water injecting equipment through studying the characteristics of Chang-8 reservoir, compatibility of injected water, wellbore control and water injection system, presented corresponding control measures in combination with the actual situation on the field and evaluated the effects of the treatment. This shall provide references for similar reservoir management in the future.