川中地区角51井低渗气层加砂压裂增产的可行性研究

Study on feasibility of sand fracturing in low permeability gas zone of well Jiao-51 in middle of Sichuan province

方法通过对角51井须四层储层条件的评价及增产潜力的研究，探讨了该层压裂增产的可行性。目的研究川中地区角51须四低渗气层加砂压裂增产的可行性。结果角51井须四层有效储层发育，有天然裂缝存在，纵横向均具人工造缝的有利条件，而且压裂缝高能被控制，增产潜力大、能量足。结论角51井须四层可以进行加砂压裂，压裂时，应先将下部T_3x^4Ⅳ层射孔井段用砂粒坦住，只压裂上部T_3x^4Ⅱ层，以确保最佳填砂效果，充分发挥主要产层T_3x^4Ⅱ的增产潜力。

Method This paper studies the feasibility of fracturing in zone Xu-4 of well Jiao-51 through evaluation of the reservoir and study on its production potential. Purpose To study the feasibility of sand fracturing in low permeability gas zone Xu-4 of well Jiao-51 in middle of Sichuan province. Result There are development of pay reservoir, natural fracture, favourable conditions for creating fracture in both longitudinal and lateral direction in zone Xu-4 of well Jiao-51. The height of fractured fracture can be controlled. The reservoir has great potential of increasing production and sufficient formation energy. Conclusion Xu-4 zone of well Jiao-51 is suitable for sand fracturing. When fracturing, perforated interval of zone T3x4 Ⅳ in the lower part should be first buried with sand. Only zone T3x4 Ⅱ in the upper part is going to be fractured to ensure the best sand filling efficiency and tap the production potential of the main payzone.