库车前陆盆地低孔裂缝性砂岩产能预测模型  

A capacity prediction model for the low porosity fractured reservoirs in the Kuqa foreland basin,NW China

作　　者：杨锋[1] 朱春启 王新海[1,3] 屈海州[4] 张福祥[5] 牛新年[5] 

机构地区：[1]油气资源与勘探技术教育部重点实验室(长江大学) [2]中国石油长城钻探工程有限公司 [3]中国石油大学(北京) [4]西南石油大学 [5]中国石油塔里木油田公司

出　　处：《石油勘探与开发》2013年第3期341-345,共5页Petroleum Exploration and Development

基　　金：国家自然科学基金项目(61273179;11201039);国家油气重大专项塔里木盆地库车前陆冲断带油气开发示范工程(2011zx05046);塔里木科研项目"库车前陆盆地低孔裂缝性砂岩产能预测技术研究"(201011110228)

摘　　要：基于对裂缝参数的描述及裂缝发育程度与产能的关系,讨论库车地区低孔裂缝性砂岩产能预测方法。对于取心井段,裂缝参数可由岩心直接描述;对于未取心井段,可利用成像测井资料统计裂缝参数,根据取心段岩心与成像测井统计参数经验差值校正后,可较准确定量描述裂缝参数。大北—克深地区气井测试段裂缝面缝率与产能有较好的相关性,据此得出裂缝产能系数计算公式,根据裂缝产能系数与米产气指数的回归公式即可预测气井产能。建立裂缝均匀分布与非均匀分布的理论模型,基于裂缝产能系数进行产能分析,结果表明:裂缝性砂岩地层中,裂缝总条数一定时,裂缝均匀分布产能小,裂缝集中分布于某一段时产能更大。Based on the description of fracture parameters and the relation between fracture development degree and capacity, a capacity prediction method was discussed of low porosity fractured sandstones in the Kuqa region. For coring section, fracture parameters are described directly by the core; for non-coring section, fracture parameters are available through imaging logging data, and after correction by difference between statistical parameters of core description and imaging logging interpretation in the coring section, the fracture parameters can be quantitatively described more accurately. The correlation of fracture seam and capacity is good in the gas well test section in Dabei - Keshen area and it is used to derive a formula of cracks capacity coefficient. Gas well capacity can be predicted by the regression formula of cracks capacity coefficient vs. meters gas production index. Also the models of uniform and non-unifon＇n fracture distribution were established, capacity was analyzed based on the cracks capacity coefficient, results show that in fractured sandstone reservoirs if the total fracture number is constant, the capacity is small when fractures have a uniform distribution, the productivity is bigger when fractures are concentrated in one section.

关 键 词：库车前陆盆地 低孔裂缝性砂岩 裂缝产能系数 产能预测 裂缝分布模型 

分 类 号：TE371[石油与天然气工程—油气田开发工程]