点汇离散法在压裂水平井产能评价中的应用

发布时间：2018-02-28 23:07

本文关键词： 压裂水平井裂缝离散法产能分析矩阵变换　出处：《天然气地球科学》2016年01期 　论文类型：期刊论文

【摘要】：在裂缝离散的基础上,应用无限大地层点汇位势理论、势叠加原理及矩阵变换方法,同时考虑裂缝的有限导流,推导了单裂缝压裂水平井和多裂缝压裂水平井产能计算线性方程组,利用数值分析方法获得了每条裂缝产量及水平井总的产量,并在此基础上进行了压裂水平井产能影响因素分析。结果表明:压裂水平井初期产能高,产量下降快,之后逐步趋于平缓,且外部裂缝产量高于内部裂缝;压裂水平井产能受多种因素的综合影响,其中裂缝条数和裂缝无因次导流能力对压裂水平井产能影响最大,其次是裂缝缝长,最后是裂缝与水平井筒夹角。相比以往的压裂水平井产能公式,该公式形式简洁,每一项物理意义明确,易于理解。通过与经典的源函数方法计算结果进行对比证明该公式及算法的可靠性和适用性。
[Abstract]:On the basis of the discrete fracture, the theory of the convergent potential of infinite strata, the principle of potential superposition and the method of matrix transformation are applied, and the finite conductivity of the fracture is taken into account. The linear equations for productivity calculation of single fracture fracturing horizontal well and multi fracture fracturing horizontal well are derived, and the total production rate of each fracture and horizontal well is obtained by using numerical analysis method. On this basis, the factors affecting productivity of fractured horizontal wells are analyzed. The results show that the initial productivity of fracturing horizontal wells is high, the production decreases rapidly, and then tends to be gentle gradually, and the output of external fractures is higher than that of internal fractures. The productivity of fractured horizontal wells is affected by many factors, among which the number of fracture strips and the dimensionless conductivity of fractures have the greatest influence on the productivity of fractured horizontal wells, followed by fracture fracture length. Finally, the angle between fracture and horizontal wellbore. Compared with the previous fracturing horizontal well productivity formula, the formula is simple in form and has a clear physical meaning. It is easy to understand. The reliability and applicability of the formula and the algorithm are proved by comparing the results with the classical source function method.
【作者单位】：中国石油勘探开发研究院;
【基金】：中国石油天然气集团公司重大专项(编号:2011E-2504)资助
【分类号】：TE328

【相似文献】