储层改造技术在龙王庙组气藏开发中的应用

Application of Stimulation Technology to Development of Longwangmiao Gas Reservoirs, Longnvsi Structure

龙女寺构造龙王庙组在勘探开发过程中仅少数井获高产工业气流,储层改造效果整体不明显。针对该区龙王庙组储层改造现状,在储层综合评价的基础上,优选有效的储层改造技术,是储层改造增产的关键。为此,从该区龙王庙组储层地质特征出发,依据当前储层改造成效,应用储层改造基本原理研究的方法,分析研究影响储层改造成效的主要因素,明确适宜储层地质特征的储层改造技术。结果表明:裂缝发育程度是影响该区龙王庙储层改造效果的关键因素;胶凝酸压裂酸化、转向酸压裂酸化、胶凝酸+加重酸压裂酸化、酸化+加砂压裂协同作业4种储层改造技术中,转向酸压裂酸化技术是该区龙王庙组最适宜的储层改造技术;实施大斜度井或水平井和应用转向酸压裂酸化技术是该区龙王庙组下步勘探开发最有效的增产措施。

In Longnvsi structure, only a few wells obtained high-yield commercial gas from Longwangmiao Formation. Moreover, an overall effect of reservoir stimulation was not apparent. So,it's very critical to develop and optimize more effective stimulation technologies. Some factors impacting on the stimulation effect were analyzed on the basis of geological features and theory of reservoir stimulation. And some stimulation technologies available for these features were made clear. Results show that(1) fracture growth is the key factor influencing on the stimulation effect of Longwangmiao reservoirs;(2) among four stimulation technologies containing gelled acid fracturing, diversion of acid fracturing, gelled + weighted acid fracturing, and acidizing + sanding fracturing, the second one is the most suitable for Longwangmiao Formation; and(3) the most effective stimulation measures in the next exploration and development include implementing technologies of high-angle or horizontal wells, and adopting diversion of acid fracturing.