论文部分内容阅读
侧钻井储层伤害评价是后期完井作业和增产措施的一项重要的设计依据，也是评价前期侧钻井造成井底伤害的一项重要指标，因而评价侧钻井对油层的伤害研究是油田急需解决的一项课题。从渗流角度讲，侧钻井是水平井渗流的一种近似，因此不能沿用裸眼井复合油藏试井模型。本研究从考虑广泛的侧钻井完井方法入手，建立侧钻井对砂岩储层伤害的不稳定渗流数学物理模型，采用比差分法和有限元法更节时、省力的边界元数值方法求解，然后合理组合相关参数团，绘制标准图版，从而计算出侧钻井引起的表皮系数和污染半径，评价侧钻井对储层的伤害。
Lateral well damage assessment is an important design basis for late completion and stimulation measures. It is also an important index for evaluating bottom hole damage caused by lateral drilling in the early stage. Therefore, it is an urgent need to evaluate the damage to the oil layer by side drilling wells. A topic. From the point of view of seepage, lateral drilling is an approximation of horizontal well seepage, so it can not follow open hole well testing model. In this study, starting from the consideration of a wide range of lateral well completion methods, an unsteady seepage mathematical and physical model of lateral well damage to sandstone reservoirs was established. Compared with the finite difference method and the finite element method, a more time-saving and labor- Reasonable combination of the relevant parameters of the group, draw the standard plate, thereby calculating the lateral drilling caused by the skin coefficient and pollution radius, evaluation of lateral drilling damage to the reservoir.