乌里雅斯太油田太27断块整体压裂数值模拟

发布时间：2018-04-03 11:07

本文选题：低渗透油藏　切入点：整体压裂　出处：《石油钻采工艺》2017年01期

【摘要】：乌里雅斯太油田太27断块属于典型的低渗透油藏,经过压裂改造后才具有一定的生产能力。为了优化太27断块的整体压裂参数,在考虑启动压力梯度的非达西渗流模型和整体压裂数学模型的基础上,采用数值模拟对生产井进行了历史拟合以验证模型的可靠性,并对乌里雅斯太油田太27断块反九点井网进行了整体压裂优化设计,分析了不同裂缝缝长比和导流能力对油井产能的影响。同时采用正交设计方法,设计了不同裂缝参数组合下的开发方案并进行优化。模拟结果表明,适合太27断块的裂缝参数为水井半缝长44 m,水井导流能力10 D·cm,边井缝长比0.3(半缝长66 m),角井缝长比0.45(半缝长99 m),角井导流能力为20 D·cm。在给定的井网条件下,裂缝缝长和导流能力存在最优值且并非越大越好,为其他低渗油藏区块整体压裂方案的设计提供技术参考。
[Abstract]:The fault block Tai27 in Uriyatai oilfield is a typical low permeability reservoir, which has a certain production capacity only after fracturing.In order to optimize the integral fracturing parameters of Tai27 fault block, on the basis of non-Darcy seepage model and integral fracturing mathematical model considering starting pressure gradient, the historical fitting of production well is carried out by numerical simulation to verify the reliability of the model.The overall fracturing optimization design for the inverse nine-spot well pattern of Tai27 fault block in Uriestadai oilfield is carried out, and the effects of different fracture length ratio and flow conductivity on the productivity of the well are analyzed.At the same time, the orthogonal design method is used to design and optimize the development scheme with different fracture parameters.The simulation results show that the fracture parameters suitable for Tai 27 block are well half fracture length 44 m, well diversion capacity 10 D cm, side well fracture length ratio 0.3 (half fracture length 66 m), angle well length ratio 0.45 (half fracture length 99 mm), angle well diversion capacity 20 D cm.Under the given well pattern condition, the fracture fracture length and the conductivity have the optimum value and are not the bigger the better, which provides the technical reference for the whole fracturing scheme design of other low permeability reservoir blocks.
【作者单位】：华北油田分公司采油工程研究院;中国石油大学(北京)石油工程教育部重点实验室;石油工业出版社有限公司;
【基金】：中国石油天然气股份有限公司重大科技专项“华北油田上产稳产800万吨关键技术研究与应用”(2014E-35-08-03)资助
【分类号】：TE357.1

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