克拉玛依油田八区下乌尔禾组油藏行列注水试验区开发试验效果  

EXPERIMENTTAL EFFECT OF DEVELOPMENT OF LINE DRIVE FLOOD TEST AREA IN LOWER WUERHE RESERVOIR OF DISTRICT NO.8,KARAMAY FIELD

作　　者：于霞[1] 覃建华[2] 吴让彬[1] 吴新平[1] 

机构地区：[1]中国石油新疆油田分公司采油二厂,新疆克拉玛依834008 [2]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000

出　　处：《新疆石油天然气》2010年第3期49-53,共5页Xinjiang Oil & Gas

摘　　要：克拉玛依油田八区下乌尔禾组油藏是特低渗透、微裂缝发育的巨厚层块状砾岩油藏。1979年采用反九点法面积井网试验开发,经历了三次加密,实现了全面注水开发,由于八区下乌尔禾组加密后,地层压力下降快、见水未见效井较多,稳产基础差。为寻求合理注采井网,为提高注水开发效果提供依据,论证现有注采井网方式调整的可行性,建立水压驱动,2006年10月在256井断裂上盘中部采矛盾突出的八个井组开展行列注水试验。试验开展3年来结合油井配套措施,有效地扩大了注水波及体积、减缓压力下降及递减,行列开采形势有所改观。对比八区下乌尔禾组油藏上盘4+5井网效果较好。Xia Wuerhe reservoir of District No.8 in Karamay oil field is a thick massive ultra reservoir with low permeability and well developed microfracture conglomerate reservoir,and was developed by water-flooding with inverted nine-spot pattern in 1979,undergone thrice infill development,then flood development was achieved thoroughly.After infill development,the reservoir pressure droped speedily,water was breakthrough but non response producers seized a major ratio,and was short of the basis of maintenance capability.In order to find advisable flooding network,to offer criteria to improve water flood effect,to demonstrate the feasibility of current flooding pattern adjustment,and to develop water drive,line drive flood test was done with 8 well groups in the area with prominent injection imbalance in up-faulted block of 256 fracture in 2006.With three years’ experiment with self-contained oil well stimulation,broadened water-flood sweep volume;slowed down decrease of reservoir pressure;the condition exploration improved obviously,as a result,the development effect was better than that of WU-4+5 unit in the up-faulted block.

关 键 词：油藏 行列式注水 试验 开发效果 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]