低渗透油藏综合量化评价井网适应性探讨

Discussion of comprehensive quantitative evaluation of well pattern adaptability in low permeability reservoirs

井网适应性评价是油葳开发中一项重要分析评价内容，尤其是低渗透油藏，但由于其影响因素复杂，目前尚无较好的可推广的分析方法。在借鉴前人经验的基础上，从油藏开发动态的角度，以低渗透油藏为研究对象。构建了综合考虑最终采收率、水驱储量、采油速度、地层能量保持、见效特征、水驱特征、产量递减的井网适应性评价指标体系：再通过评价指标的分类量化处理和优化权重系数分配，建立了低渗透油藏水驱开发阶段井网适应性评价综合量化模型：最后以两个不同油藏为例，开展综合量化模型评价井网适应性的实际应用，检验了其适用性，证明了其借鉴价值。

Evaluation of well pattern adaptability is a significant content of analysis in reservoir development, especially for low permeability reservoirs. Currently there is no better analysis method worth to be generalised due to complexity of the influencing factors. Based on the experience from predecessors, from the angle of reservoir performance, taking low permeability reservoirs as objects to study, a system of evaluating the index of well pattern applicability is established with comprehensive considerations of ultimate re- covery factor, waterflooding reserves, oil recovery rate, conservation of reservoir energy, response characteristics, water drive charac- teristics, and production rate decline. A comprehensive quantitative model of appraisal of well pattern adaptability at the waterllooding stage of low-permeability reservoirs is established by classified and quantified processing of evaluation indexes and optimization of weight factor distribution. Finally, taking two different reservoirs for example, the well pattern adaptability is evaluated practically with the comprehensive quantitative model. The applicability is tested, and its reference value has been proven.