基于枚举法的断块油藏层系重组优化设计

发布时间：2019-05-18 14:19

【摘要】：高含水期多油层断块油藏,纵向非均质性严重,层间动用程度差异明显,层系重组是减小层间干扰、提高中低渗储层动用程度的有效手段。文中采用枚举法,穷举出可能方案,综合考虑技术、经济两方面,筛选出采收率和经济效益都较高的重组方案。技术方面以累计产油量为评价指标,建立了多油层非活塞水驱油模型,根据B-L水驱油理论,预测各划分方案累计产油量。同时,考虑经济效益约束,采用净现值法,进行动态经济评价。以某断块油藏为例,计算结果表明:14个小层划分为2套层系,共有8 191种重组方案,采用渗流阻力级差约束后筛选,保留64种,经开发指标预测和经济效益评价,第63种为最优方案。其钻井数为2,油价3 500元/t时,其净现值为430万元。
[Abstract]:In the high water cut stage, the longitudinal heterogeneity of multi-reservoir fault block reservoirs is serious, and the degree of interlayer production is obviously different. the reorganization of strata is an effective means to reduce interlayer interference and improve the production degree of medium and low permeability reservoirs. In this paper, the enumerating method is used to enumerate the possible schemes, and the reorganization scheme with high recovery and economic benefits is screened out by considering the technical and economic aspects. In the technical aspect, the cumulative oil production is taken as the evaluation index, and the multi-reservoir non-piston water flooding model is established. According to the B / L water displacement theory, the cumulative oil production of each division scheme is predicted. At the same time, considering the constraint of economic benefit, the net present value method is used to evaluate the dynamic economy. Taking a fault block reservoir as an example, the calculation results show that 14 small layers are divided into 2 sets of layer systems, and there are 8191 kinds of reorganization schemes. 64 species are selected by seepage resistance differential constraint, and 64 kinds are retained by development index prediction and economic benefit evaluation. The 63 th is the optimal scheme. When the drilling number is 2 and the oil price is 3 500 yuan / t, the net present value is 4.3 million yuan.
【作者单位】：中国石油大学(华东)石油工程学院;中国石化胜利油田分公司勘探开发研究院;
【基金】：国家科技重大专项“胜利油田特高含水期提高采收率技术”(2016ZX05011)
【分类号】：TE347

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