延长油田超低渗透油藏水平井分段压裂产量计算模型研究

发布时间：2018-03-12 07:26

本文选题：超低渗透致密油藏　切入点：水平井　出处：《钻采工艺》2017年03期 　论文类型：期刊论文

【摘要】：目前国内外关于水平井压裂产量的计算主要是基于储层基质中的达西流动模型,而油田矿场生产实践和室内实验结果表明,超低渗储层基质渗流不符合经典达西定律,存在较强的非线性渗流特征。因此,建立基于非线性渗流规律的产量评价模型对于超低渗透致密油藏的开发显得尤为重要。文章针对超低渗透储层的渗流规律,考虑分段压裂水平井基质中的非线性流动、裂缝中的达西流动、水平井井筒内的水力压降流动,提出一种耦合数值求解水平井产量的计算新模型,并应用该模型对延长油田W区块水平井产量进行计算,符合率达85.21%~95.79%。结果表明,应用推导的水平井产量计算模型可得到相对可靠的计算结果,验证了模型的准确性,这对于超低渗透储层分段压裂水平井技术具有重要的实践意义。
[Abstract]:At present, the calculation of horizontal well fracturing production at home and abroad is mainly based on Darcy flow model in reservoir matrix, and the field production practice and laboratory experiment results show that the matrix percolation of ultra-low permeability reservoir does not conform to the classical Darcy law. Therefore, it is very important to establish a production evaluation model based on nonlinear percolation law for the development of ultra-low permeability tight reservoir. Considering nonlinear flow in horizontal well matrix, Darcy flow in fracture and hydraulic pressure drop flow in horizontal well, a new coupled numerical model for calculating horizontal well production is proposed. The model is used to calculate the horizontal well production in the W block of Yanchang Oilfield, and the coincidence rate is up to 85.21 and 95.79.The results show that the model can obtain relatively reliable calculation results and verify the accuracy of the model. This is of great practical significance for segmented fracturing horizontal well technology in ultra-low permeability reservoir.
【作者单位】：陕西延长石油(集团)有限责任公司研究院;长江大学地球科学学院;
【基金】：国家科技重大专项“大型油气田及煤层气开发”(编号:2011ZX05003-001)
【分类号】：TE319;TE328

【相似文献】