胜利油田水平井地质导向钻井技术

Geo-Steering Drilling Technique of Horizontal Wells in Shengli Oilfield

通过理论研究、仪器研制和软件开发,自行研制了具有自主知识产权的新型MWD、随钻自然伽马测量仪、随钻电阻率测量仪以及国内第一个移动式随钻自然伽马测井标准刻度装置,形成了地质导向双参数LWD仪器设计制造技术和地质导向钻井工艺配套技术。该技术在50余口井地质导向钻井中进行了成功应用,开发的最小有效油层厚度0.8 m,平均油层有效延伸率达94%以上,将井眼轨迹控制标准由原来几何导向的"工程中靶"提升为"地质中靶",降低了因地质目标不确定性而带来的钻探风险,为薄油层、厚油层顶部剩余油等复杂油气藏开发提供了技术支撑。

A new MWD, a gamma ray measurement while drilling tool, and the first mobile gamma ray logging master scale device have been developed with independent intellectual property based on theoretical study along with instrument and software development. These instruments established double-parameter LWD design and manufacture technique and geo-steering drilling technology. The geo-steering drilling technique had been successfully used in more than 50 wells, among which the thinnest reservoir was less than 0.8 meter and the average efficient extensibility in reservoir was more than 940%. The criteria of wellbore trajectory control improved from engineering target to geology target, reducing the exploitation risk caused by the uncertainty of geology target and providing technical support to thin reservoir and remaining oil in the upper section of thick reservoir.