塔里木油田库车山前裂缝性砂岩改造后地层系数变化规律分析  

The Rules of Formation Coefficient Change after Fracturing Reconstruction of Piedmont Fractured Sandstone Reservoirs in Kuqa Area of Tarim Oilfield

作　　者：刘洪涛[1] 杨向同[1] 周鹏遥 巴旦[1] 张志雄[2] 

机构地区：[1]中石油塔里木油田分公司油气工程研究院,新疆库尔勒841000 [2]中石油塔里木油田分公司库车油气开发部,新疆库尔勒841000

出　　处：《长江大学学报（自科版）（中旬）》2016年第11期60-63,共4页Journal of Yangtze University(Nature Science Edition)

摘　　要：塔里木盆地库车山前气井储层为低孔裂缝性碎屑岩地层,储层基质渗透性较差,渗流能力较弱,未经措施改造的油气井通常难以获得工业产能,大部分井都需要进行措施改造作业。另外,即使经过措施改造的井,由于裂缝性储层的复杂性,导致同区域措施改造后的井产量差别很大,甚至存在个别井措施改造不到位或措施改造过度的情况,使得部分井达不到配产要求或直接经济成本的增加。通过对已有的措施改造前、措施改造后的地层系数进行分析,结合措施改造液量、地层天然裂缝与地应力的夹角等因素,建立措施改造规模与地层系数的函数。该方法可为措施改造后产能预测提供重要参数,通过对实际生产井的预测,证实了该计算公式的有效性,为油气井措施改造设计提供重要的参考依据。There was a fractured detrital rock formation with a low porosity and poor metrix permeability in reservoirs and weak percolation ability in the piedmont gas reservoir of Kuqa Area in Tarim Basin.It was difficult for obtaining industrial productivity without fracturing reconstruction,the most of the wells needed to be reconstructed.In addition,because of the complexity of fractured reservoirs,even if some of the wells were reconstructed,there also existed great difference in production output after the reconstruction,and even in few wells the reconstruction was ineffective or excessively treated,therefore some of the wells could not meet the requirements of production allocation or resulted in the increase of production cost.By comparing the formation coefficient after frac-turing with that of before fracturing,combined with liquid volume,the included angle between natural fractures and formation stress,and other factors,the function between fracturing scale and formation coefficient is established,the method can provide critical parameters for productivity prediction after fracturing.It is used for production well prediction and it is proven that the calculation formula is effective and it provides important reference of the design of fracturing reconstruction.

关 键 词：裂缝性砂岩 产能 地层系数 措施改造液量 

分 类 号：TE344[石油与天然气工程—油气田开发工程]