中-大型加砂压裂在新场J2s气藏开发中的应用

新场气田上沙溪庙组（J2s）气藏储层岩石物性、孔渗关系、孔隙结构和连通性均较差，含气品位低．特别是沙－段和沙三段储层尤其如此。常规小型加砂压裂由于造缝长度短，泄气半径小，应用后增产效果较差，稳产期短，单井产量低。大量压裂实例证明，J2s气藏应用中－大型压裂增产稳产期长，增产效果显著，平均单层可比小型压裂多产天然气3706．7632×10^4m^3，多创经济效益3484．36万元，是该气藏剩余储量和难动用储量有效开发的关键技术手段，具有良好的推广应用前景。

An Application of Middle-large Sand Fracturing in the Development of J2s gas Reservoirs ,Xinchang Field

The gas reservoir in upper Shaximiao Formation（J2s） is poor in petrophysical property,porosity-permeability relationship ,pore structure and connection and gas content,particularly in Member 1 and 3 of the Formation.The traditional small sand fracturing usually results in poor production gain,short production stability and low single-well rate due to its shorter induced fractures and smaller gas drainage radius.A number of examples have shown that the middle-large sand fracturing for J2s reservoirs can lead to a much longer period of stable production and a significant effect of production gain,with its average production per gas bed 3706.7632×10^4m^3 of gas over that of the small sand fracturing,which may correspond to a revenue increase of ￥34383600.Therefore,the middle-large sand fracturing is a key technique to effectively develop remaining reserves and difficult recovery reserves of the reservoir, and has a good prospect of promotion.