基于井筒与油藏耦合机制的水平井试井设计

Horizontal well test design based on wellbore and reservoir coupling strategy

通过试井设计确定合理的测试工作制度是保证测试成功、资料完整、解释可靠的关键。尽管业界一直广泛重视试井设计,但是目前的试井设计主要利用经验或近似关系作很初步的估计,缺少完整的手段综合考虑各种因素的影响。为此,提出基于井筒油藏耦合机制的水平井不稳态产能预测模型,应用该耦合模型进行气藏水平井的产能测试和压力恢复测试的全过程模拟,通过测试模拟全面分析各种因素对测试资料的影响,从而为试井设计方案的优选和风险评价提供先进的手段。

To determine reasonable well test rules through well test design is a key factor to ensure successful well test, complete data and reliable interpretation. The industry pays much attention to well test design, but the current design mainly uses empirical of approximate relation for primary estimation, lacking of complete method for considering the effect of different factors. This paper, proposes an unsteady productivity prediction model for horizontal well based on wellbore and reservoir coupling strategy. It applies the coupling model to perform productivity test of horizontal wells in gas reservoirs and simulation of the whole process of pressure restore test. It analyzes the effect of different factors on test data through test simulation so as to provide advanced method for well test design plan optimization and risk evaluation.