动静态资料综合研究油藏特征

Comprehensive study of reservoir characteristics with static and dynamic information

T油田中区油藏埋深浅,高孔高渗,原油粘度较高,为普通稠油。油井生产初期可以自喷,天然能量充足。油井投产后含水上升速度快,无水期和低采油含水阶段时间短,开发10a后油田的综合含水超过85%。2004年后曾对中区进行了综合治理研究和现场实施,调整效果比较理想。2006年后油田产量呈下滑趋势,稳产难度加大,油田再次进入调整期。通过综合应用调整井的测井资料、饱和度监测、动态资料以及油藏数值模拟等方法,落实了剩余油的分布特点,发现实际动态资料与原地质认识有一定的出入,结合地质特征的重新进行研究,对油藏类型和驱动方式有了新的认识,为油田的下步调整提供了充分的依据。

In T oilfield, reservoir of the central area was shallowlly buried. The physical properties of the reservoir are high porosity and high permeability. The crude oil is conventional heavy oil due to high viscosity. At early stage of oil field development, natural flow of oil wells can occur due to sufficient natural energy. After wells were put into production, the water cut fleetly increases, production life without water and low water cut is short, after about 10 years, average water cut can reach over 85 ~. Since 2004, comprehensive treatments were studied and carried out in the central area of T oil＋ field. The effect of the treatments was better. Since 2006, oil production showed a declining trend, keeping constant rate of oil production became very difficult. So the oilfield once again entered a period of adjustment. Through the integrated application of wells logging data, saturation monitoring, dynamic data, and reservoir simulation, the distribution characteristics of remaining oil was determined. Then it was found that the actual dynamic data does not match with the original geological tmderstanding. Combined with the restudy of the geological characteristics, the new understandings of reservoir types and drive manner can be achieved to provide the basis for next adjustment of the field.