地面测斜仪在长庆油田裂缝测试中的应用

Application of surface tiltmeter fracture mapping in Changqing Oilfield

唐梅荣 张矿生 樊凤玲

TANG Meirong ZHANG Kuangsheng FAN Fengling

长庆油田公司油气工艺研究院，陕西西安　710021

Oil &

准确获取水力裂缝的方位、尺寸等参数对长庆低渗透油气田开发具有重要意义，地面测斜仪测试方法是目前国际上公认的最为先进的裂缝监测技术之一，它采用高灵敏度的仪器监测压裂裂缝对大地造成的变形，运用地球物理反演计算来确定裂缝方位、倾角及产状。与同类方法相比，地面测斜仪能准确测量裂缝的方位和产状。介绍了地面测斜仪测试机理、安置要求、技术指标。长庆油田在国内首次引进地面测斜仪监测技术并在苏里格气田和榆林气田试验2口井，获得了水力裂缝方位NW70°左右，并且裂缝存在约20%的水平分量。通过应用地面测斜仪监测技术，进一步认识到了水力裂缝延伸的复杂性，提高了压裂设计针对性和水平。

To obtain such parameters as the fracture azimuth and dimension of hydraulic fracturing accurately is significant to the development of Changqing low permeability reservoirs. The test method through the surface tiltmeter is one of the most advanced techniques for fracture monitoring in the world. It uses high-sensitivity instruments to monitor the deformation resulted from fracturing and geophysical inversion to confirm the azimuth, obliquity and spacing. Compared to the other methods, the surface tiltmeter can be used to measure the azimuth and spacing of fractures exactly. The principle, resettlement requirements, technical indicators of the surface tiltmeter are introduced in this paper. It is the first time the monitoring method through the surface tiltmeter was introduced to China. The method has been tested in two wells in Sulige and Yulin gas fields. The azimuth of hydraulic fracturing is about NW70°and there is about 20% horizontal component in fracturing. The application of the monitoring method enables us to know the complexity of extension in hydraulic fracturing and improves improving the fracturing design.