临兴区块盒三段水平井分段压裂技术与压后评价

Staged fracturing technology and evaluation after fracturing of horizontal well in the third Member of Shihezi Formation in Linxing block

临兴区块上石河子组盒三段为低孔低渗致密砂岩气藏,不经压裂无自然产能。以LX-161-3H井为例,采用水平井分段压裂技术,将水平段分9段进行压裂。根据压裂层段地层温度、气层特性、黏土含量等参数,优选出瓜胶压裂液体系,具有储层伤害性低、破胶迅速、增产改造效果好的特点。压裂施工过程未见异常,施工顺利,增产改造效果良好。

The third Member of the Upper Shihezi Formation in the Linxing block is a low-porosity and low-permeability dense sandstone gas reservoir with no natural production capacity without fracturing.In this paper,taking the LX-161-3H well as an example,the horizontal section is fractured in nine stages using horizontal well segmentation fracturing technology.According to the parameters of reservoirs temperature,characteristics and clay content in the fractured section,the guar gum fracturing fluid system is preferably selected,which has the characteristics of low reservoir damage,rapid gum breaking and good production enhancement and transformation effect.No abnormality occurred during the fracturing process,and the construction was smooth with good effect of production enhancement and transformation.