孝泉地区致密砂岩气藏水平井产能评价研究  

RESEARCH ON HORIZONTAL WELL PRODUCTIVITY OF TIGHT SANDSTONE GAS RESERVOIR IN XIAOQUAN AREA

作　　者：张岩[1] 吴铬[1] 黎华继[1] 苏燕[1] 唐灵[1] 张仕强[1] 钟水清[2,3] 程俊 王洪星[5] 

机构地区：[1]中国石化西南油气分公司 [2]西南石油大学 [3]中国石油西南油气田分公司 [4]中国石油四川销售分公司 [5]中国石油吉林油田分公司

出　　处：《钻采工艺》2013年第4期56-58,61,共4页Drilling & Production Technology

基　　金：国家油气重大专项"剩余油分布综合预测与层系井网重组技术"(编号:2008ZX05010-003)资助

摘　　要：孝泉气田勘探开发主要层位为侏罗系蓬莱镇组和沙溪庙组,储层砂体为三角洲前缘的分流河道沉积,属于典型的低孔致密储层。由于基质物性较差,以往直井产能低,储量基本未动用,近期水平评价井实施分段压裂工艺技术取得较好效果,为指导下一步开发井位部署及难采储量的高效开发,根据已有系统试井和测试资料对一点法产能经验公式进行修正,得到适合该气藏的水平井无阻流量计算公式,研究了水平井产能特征。通过分析影响水平井产能的因素,认识到储层品质、裂缝发育程度、含水饱和度、井间干扰与储层改造效果均对产能有重要影响。储层优质,裂缝发育,含水饱和度低,未受到邻井生产干扰,储层伤害小,压裂液返排率高,水平井往往具有较高产能。The main layer of Xiaoquan gas field exploration and development is Jurassic Penglaizhen Formation and Shaximiao Formation,it belongs to typical low porosity,low permeability reservoir.Due to poor physical properties of the matrix,the productivity of vertical wells is low,reserves are basically unused.At present,the staged fracturing technique was used in horizontal well and good results were achieved.In order to develop effectively the difficult-to-produce reserves,the single-point production experience formula was corrected by using the existing well test system and test data,the open-flow capacity calculation formula of horizontal wells suited for the Xiaoquan gas reservoir was obtained,and the productivity features of horizontal well were studied.Through the analysis of influence factors on horizontal well productivity,the important influential factors on productivity were found,including the reservoir quality,the development degree of fractures,water saturation,interwell interference and reservoir reconstruction effects etc.In the high quality reservoir,fracture development,low water saturation,few adjacent well production interference,low reservoir damage,and high flowback rate reservoir,the productivity of horizontal well was higher.

关 键 词：孝泉气田 致密砂岩 分段压裂 裂缝分布 无阻流量 

分 类 号：TE37[石油与天然气工程—油气田开发工程]