断层的准确定位方法

Research on determining method of fault location

刘宇 李娜 王涛 张云 陈密 谈馨

中国石化河南油田分公司勘探开发研究院，河南 南阳 473132

Research Institute of Petroleum Exploration and Development, Henan Oilfield Company, SINOPEC, Nanyang 473132, China

复杂断块油田通常含油面积较小且形态不规则，其储量规模直接受断层控制。在开发中要合理动用该类油田，必须提高对断层产状和位置的识别精度，为开发井的部署提供依据。文中利用剖面法、公式法、交点法对断层位置的确定进行了分析，确定了河南新庄油田等复杂小断块油田中断层的位置。根据研究成果，在新庄南三块沿构造高部位贴近断层15～25 m，成功部署了14口水平井和15口大斜度定向井。其中，水平井投产后，单井初期平均产油量9.5 t/d，油汽比0.52，单井累计产油量0.49×10⁴ t，取得了良好的开发效果，为该类油藏的有效动用提供了技术支撑。

The oil-bearing area in complicated fault-block oilfield is usually small and irregular, and the size of reserves is directly controlled by faults. To develop this kind of oilfield properly, the recognition accuracy of fault occurrence and location must be enhanced, providing the basis for the deployment of development wells. Using the profiling, formula and intersection methods, this paper analyzed the determining accuracy of fault, and according to such methods, the fault locations in some complicated fault-block oilfields such as Xinzhuang in Henan Oilfield are determined. Based on the research result, 14 horizontal wells along the structural high location close to the fault 15-25 m and 15 high angle deviated wells were deployed. After the horizontal wells were put into production, the initial oil production of single well is 9.5 t/d, the oil-gas ratio is 0.52 and the cumulative oil production of single well is 4,900 t, achieving a good development result, which can provide technique support for the development of such reservoirs.

10.6056/dkyqt201203005