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文章根据川西致密砂岩气藏的损害特征和现场 10 0多口井的测试资料的统计分析表明 ,储层表现出自身的损害特点 ,其常规的矿场评价指标和标准不一定完全适合非常规的致密碎屑岩气藏的情况。针对川西致密砂岩气藏损害特征 ,提出新的气藏损害的评价标准 ,同时根据致密砂岩气藏油层损害的要求和评价标准的需要 ,建立起新的描述裂缝—孔隙性砂岩气藏损害评价的数学模型 ,该模型在原来裂缝—孔隙性砂岩渗流模型的基础上考虑裂缝与基块之间窜流表皮系数对渗流的影响。将该矿场评价标准和评价方法应用于川西致密砂岩储层的损害评价中取得很好的效果 ,这不仅对于川西致密砂岩的油层损害评价有现实意义 ,而且对裂缝—孔隙油气藏的试井解释和损害评价都具有重要的指导意义。
According to the damage characteristics of the tight sandstone gas reservoirs in western Sichuan and the statistical analysis of the test data of over 10 wells in the field, the reservoir shows its own characteristics of damage. The conventional indexes and standards of mine evaluation are not necessarily suitable for unconventional Tight clastic gas reservoirs. Aiming at the damage characteristics of tight sandstone gas reservoirs in western Sichuan, a new assessment standard of gas reservoir damage is proposed. Based on the requirement of reservoir damage and the criteria of evaluation, the new damage evaluation of fractured-sandstone gas reservoir is established Based on the original fractured-porous sandstone seepage model, this model considers the influence of the stratified skin factor between the fractures and the basement on seepage. The evaluation criteria and evaluation methods of the mine have been applied to the damage evaluation of the tight sandstone reservoirs in the western Sichuan and have achieved good results. This not only has practical significance for the evaluation of the reservoir damage of the tight sandstone in the western Sichuan, Interpretation and damage evaluation have important guiding significance.