杜庆龙
DU Qinglong

• 1:大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

对于注水开发的非均质多油层砂岩老油田,搞清油水井的分层动用状况是有针对性地采取分层调整措施的前提条件。针对喇萨杏油田油层多、非均质性严重、开发时间长、层系井网复杂的特点,以精细地质研究成果和渗流理论为基础,首先提出了一套基于沉积相控的油水井注采关系的自动评价方法;然后综合考虑油水井的油层条件和开发条件,提出了基于井间非均质性的渗流阻力计算方法;最终实现了油水井注采关系的定量评价和注水井分层注入量、生产井分层产油量的计算。通过喇萨杏油田6个典型区块的评价,水驱控制程度统计精度达到95%以上,吸水剖面层段吸水比例符合率达到77.9%,小层累计注水量和累计产油量与数值模拟结果基本一致。根据评价结果,对5口井50个小层实施补孔、压裂等措施,取得明显的增油降水效果。该方法具有操作简便、实用、高效等优点,可广泛应用于多层水驱砂岩油田的注采关系评价、小层动用状况及剩余油研究。
For waterflooded multilayered heterogeneous sandstone mature oilfields,the ensured developed conditions of the separated layers of the oil and water wells are the prerequisite to the specific interlayered adjusting measures. In the light of the characteristics of the multiple oil reservoirs,strong heterogeneity,longer production period and complex series of the strata and well patterns,on the bases of the fine geological research achievements and filtrating theory,the automatic facies-controlled injection-production relationship evaluating method was first promoted; and then comprehensively considering the oil reservoir and development conditions of the wells,the calculating method to determine the percolation resistances was presented based on the interwell heterogeneities; finally the quantitative evaluations of the injection-production relationships among the wells were realized,so done the calculations of the separated layers' injection and production. With the help of the evaluations of the six typicalblocks for Lasaxing Oilfields,the precisions of the waterflooded controlled degree have reached 95% or above,the coincidence rates of the water absorbed percentage of the water absorbed intervals have risen to 77. 9%,and moreover there is a good consistency between the accumulated injection-production and results of the numerical simulation. According to the evaluated results,the stimulations such as adding perforation / re-perforating and fracturing were conducted for the 50 sublayers of 5 wells,much more obvious results of increasing the oil production and reducing the watercut were achieved. The method is verified to possess the easy-to-use,practical and high-efficiency advantages,and furthermore can be widely applied in the researches on the injection-production relationship evaluation,sublayer developed conditions and remained oil.

关键词(KeyWords)： 水驱;单层;注采关系;两相渗流;剩余油
waterflooding;individual / single reservoir / layer;injection-production relationship;two-phase filtrational flow;remained oil

Abstract:

Keywords:

基金项目(Foundation): 国家重大科技专题项目(2011ZX05010-002,2011ZX05052);; 中国石油天然气股份有限公司重大科技项目(2011E1205)

作者(Author): 杜庆龙
DU Qinglong

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