致密砂岩气层压裂产能预测主要影响因素确定

Research on Determination of the Main Factors Influencing the Gas Well Post-frac Productivity Prediction for Tight Sandstone Reservoirs

致密砂岩储层孔隙度小、渗透率低、含气饱和度低，基本上没有自然产能，需要进行压裂，进行压裂产能的预测很有必要性。致密砂岩压裂产能的影响因素众多，并且各影响因素与产能之间关系复杂，从气井稳定声能公式入手，分别利用线性回归、灰色关联数学手段寻找分析测井参数、压裂施工参数对产能预测的影响因素重要的参数，分析苏里格西部地区致密砂岩气层压裂产能的关键影响因素。为致密砂岩气层压裂产能预测提供基本的参考。

Tight sandstone reservoirs are always with the characteristics of such as low porosity, low permeability, low gas saturation, and o almost with no natural capacity. Therefore, they have to be fractured for productivity, and the prediction of capability is necessary. But there are so many factors, and the relations between the factors and the post-frac productivity are complicated. In this study, first I concluded the total factors from the gas well stable productivity formula, and then I used linear regression, gray correlation to look for the main factors from the logging parameters and fracturing factors parameters in SULIGE area. This study could provide basic references for the gas post-frac productivity prediction in tight sandstone reservoirs.