随钻地质导向在S7-59H井中的应用

Application of LWD geosteering in S7-59H well

王谦¹ 苏波¹ 李震¹ 虞兵¹ 杨帆¹ 洪英霖²

中国石油集团测井有限公司，陕西 西安 710077 中国石油塔里木油田分公司，新疆 库尔勒 841000

Logging Company Ltd., PetroChina, Xi′an, 710077, China Tarim Oilfield Company, PetroChina, Korla 841000, China

水平井地质导向技术在地质构造复杂的油气藏与薄油层的开发中发挥着重要的作用，通过地质导向可以提高水平井储层的钻遇率，提高单井产量，降低勘探开发风险。文中系统地建立了视地层倾角的预测方法，以随钻测井资料为基础进行地层精细对比，利用随钻电阻率探测半径的差异进行储层界面预测，结合气测、岩屑、钻时等信息克服了随钻测井仪器零长带来的盲区，指导水平井安全着陆。同时，结合视地层倾角实时预测结果，调整控制井眼轨迹远离储层边界，使储层的钻遇率高达100%。通过对随钻测井资料与电缆测井资料的对比分析，结果表明，随钻测井曲线与电缆测井曲线的一致性较好，随钻自然伽马测井对高伽马储层的识别能力低于电缆自然电位测井，随钻电磁波电阻率的分辨率略低于阵列感应的分辨率，随钻测井资料可以满足储层解释评价的需求。

Horizontal well geosteering technology plays an important role in the development of the complex geological structure or thin reservoir. Geosteering can raise the level of the reservoir well drill rate, improve well production, and reduce exploration and development risk. This paper systematically establishes the methods to predict the formation dip. Using fine correlated horizons based on LWD data, reservoir interface predicting by different probe radius of drilling resistivity, and combining with gas logging, cuttings, drilling time and other information, the blind area caused by tool zero length was overcome, which can be used to guide horizontal well safe landing. The well trajectory is adjusted and controlled away from the reservoir boundary using dip real-time prediction results, which makes the reservoir drilling rate as high as 100%. Based on the comparison between while drilling logging data and cable logging data, we find that while drilling logging and cable logging curve are in good agreement. For the identification of high gamma reservoir, natural potential logging is superior to LWD gamma logging, and the resolution of electromagnetic wave resistivity is lower than that of multi-array induction. The results show that LWD data can meet the demand of reservoir interpretation and evaluation.

10.6056/dkyqt201602027