摘要
储层压裂裂缝高度精确评价是海上油气田致密储层压裂效果评价的核心内容之一,直接影响油气田开采效果。受制于评价精度不高、放射性污染及管柱条件等因素,井温测井等传统的压裂裂缝高度评价方法无法在海上油气田应用。将过套管交叉偶极子阵列声波各向异性和径向速度层析成像测井技术相结合,不仅可以准确地确定海上油气田致密储层压裂后裂缝沿井壁波及段高度和集中破裂段高度,还可对储层压裂后产能高效贡献井段进行评价。东海西湖凹陷应用表明,过套管交叉偶极子阵列声波测井无污染、时效高,满足海上作业要求,值得广泛推广应用。
Accurate evaluation of hydraulic fracture height in offshore tight sandstone reservoir is one of the key evaluation works, which directly affects the oilfield development. Such traditional technologies as borehole temperature logging cannot be applied to evaluate the hydraulic fracture height for offshore oil-field due to low accuracy, radioactive pollution and down hole strings constraint. The proposed method, combining through casing cross-dipole acoustic array logging and radial velocity tomography logging, can accurately evaluate hydraulic fracture height along the wellbore, the fracture-concentrated zone, and the most productive reservoir interval after hydraulic fracturing. The applications in Xihu sag of the East Chi-na Sea basin show that the method can be applied widely due to the advantages of non-pollution and high efficiency, meeting the requirements of offshore operation.
出处
《中国海上油气》
CAS
CSCD
北大核心
2016年第6期34-39,共6页
China Offshore Oil and Gas
基金
中国海洋石油总公司"十二五"科技重大项目"中国近海低孔低渗油气藏勘探开发关键技术与实践(编号:CNOOC-KJ 125 ZDXM 07LTD)"部分研究成果
关键词
海上油气田
致密砂岩储层
压裂
裂缝波及段高度
集中破裂段高度
声波各向异性
声波径向速度层析成像
西湖凹陷
offshore oil and gas field
tight sandstone reservoir
fracturing
fracture-extended zone height
fracture-concentrated zone height
acoustic anisotropy
radial velocity tomography
Xihu sag
