胡七北块剩余油分布规律与开发

Study on Residual Oil Distribution and Potential Tapping in North of Hu 7 Block

吕立爽 邓金华 丁海霞 康艳琴 田东明 薛红妍 吕晓芹

LV Lishuang DENG Jinhua DING Haixia KANG Yanqin TIAN Dongming XUE Hongyan LV Xiaoqin

中国石油化工股份有限公司中原油田分公司勘探开发研究院, 河南濮阳 457000; 中国石油化工股份有限公司中原油田分公司采油五厂, 河南濮阳 457000

Research Institute of Petroleum Exploration and Development, SINOPEC Zhongyuan Oilfield Company, Puyang Henan 457000, China; The 5st Oil Production Plant, SINOPEC Zhongyuan Oilfield Company, Puyang Henan 457000, China

随着开发的深入,胡七北块进入高含水期,开采难度日益增大,寻找剩余油富集区带迫在眉睫。以沉积学、构造地质学、采油工程原理为指导,立足现有井网,总结胡七北块剩余油分布规律。研究发现胡七北块剩余油分布有两种类型:一是在水驱难以到达的构造边缘地带及构造高部位富集;二是在水驱动用程度较低的低渗储层中富集。通过部署新井、侧钻老井、转注对应井、完善注采井网、选择脉冲注水、采油工程技术,提高水驱效率,采用压裂措施,改善储层物性,以期达到油藏稳定、经济、高效开发目标。

Hu 7 Block has been at high water content stage, and oil field development is becoming more and more difficult. So it is very important to search for the regions with rich remaining oil. In this article, the distribution regularity of the remaining oil in north of Hu 7 Block has been summarized under the guidance of sedimentology theory, structural geology, oil recovery engineering on the basis of existing well pattern. Through study it is found that the enrichment patterns of the remaining oil is divided into two types, one is enriched in the edge of structure and the high position of micro structures which can't be flooded by injected water. The other one is enriched in the layers with low permeability. By deployed new wells, side drilling old wells, taking oil wells converted to water wells, optimization of wells spacing and well patterns, selecting pulse injection and using the technology of oil production engineer-ing to, water flooding efficiency has been improved greatly. By using fracturing technology, the physical properties of reservoirs have been improved. It is hoped that the oil reservoir could keep stability, and oil field development can be economic and efficient.

https://doi.org/10.3969/j.issn.1008-2336.2013.02.068