FMI资料在塔中卡1工区裂缝和构造应力场研究中的应用

Application of FMI data in fracture and tectonic stress field studies in Kal region,middle Tarim Basin

马庆佑 夏永涛 朱秀香

Ma Qingyou Xia Yongtao Zhu Xiuxiang

中国石化 西北油田分公司,乌鲁木齐 830011

SINOPEC Northwest Company,Urumqi,Xinjiang830011,China

塔中卡1工区中、下奥陶统鹰山组储层主要以裂缝型和裂缝-孔隙型为主,储层发育和分布与裂缝关系密切。利用10口已钻井FMI资料进行裂缝识别、成因分类和走向统计分析,认为该工区高阻缝(构造充填缝)最发育,通常被方解石或泥质充填,高导缝(构造开启缝)和钻井诱导缝次发育。钻井诱导缝和井眼崩落受现今应力场控制,构造成因的高导缝和高阻缝的形成则受古构造应力场控制。卡1工区现今构造最大主应力为NE和NEE2组优势方向,中、晚奥陶世古构造应力场最大主应力方向主要有NNE,NEE2组,其中NNE走向裂缝的形成早于NEE走向的裂缝。

The reservoirs of the Lower-Middle Ordovician Yingshan Formation in Ka1 region of themiddle Tarim Basin are mainly fissure and fissure-pore types.Reservoir generation and distribution areclosely related to fissures.Fissure identification,origin classification and orientation analyses were car-ried out with FMI data from 10 drilled wells.High-resistant fractures account for the first place in theregion,usually filled with calcite and mud.High-conductive and drilling-induced fractures account forthe second place.Drilling-induced fractures and borehole breakouts are controlled by present stressfield,while high-conductive and high-resistant fractures caused by tectonic genesis are closely related topalaeo-stress field.The present stress field in Ka1 region is mainly NE and NEE oriented.The palaeo-stress field during the Middle and Late Ordovician was mainly NNE and NEE oriented,and the NNEoriented fractures were formed before the NEE oriented ones.

https://doi.org/10.11781/sysydz2011S1046